{"title":"Ported Subwoofer Boxes","description":"\u003cdiv class=\"ai-collection-block\"\u003e\n\u003ch2\u003eHow a Ported Subwoofer Box Works\u003c\/h2\u003e\n\u003cp\u003eA ported enclosure, also called a vented enclosure, uses a tuned port to extend and reinforce low-frequency output beyond what a sealed design can achieve at the same power input. The physics behind it are straightforward: at and near the port tuning frequency, the air mass in the port resonates in phase with the driver's cone movement, contributing its own acoustic output alongside the cone. The result is a combined output that exceeds what the cone alone produces, with more SPL, deeper extension, and higher efficiency in the tuned frequency range.\u003c\/p\u003e\n\u003cp\u003eBelow the port tuning frequency, the port's contribution reverses phase and the driver effectively unloads. Cone excursion increases rapidly while acoustic output drops sharply. This is the ported enclosure's primary limitation and the reason port tuning frequency is the most critical design decision in a vented system. Tune too high and the enclosure sounds punchy in the upper bass but thin below 40Hz. Tune too low and sub-bass extension improves but upper bass output suffers. The target tuning frequency should be driven by the driver's characteristics and the listening goals of the system, not by a generic default.\u003c\/p\u003e\n\u003ch2\u003ePort Tuning, Matching Frequency to Purpose\u003c\/h2\u003e\n\u003cp\u003eFor daily-use and musical listening builds, port tuning in the 33-38Hz range produces the best balance of deep extension and output efficiency. This range is low enough to reproduce the fundamental frequencies of kick drums, bass guitar, and synthesized bass lines, while high enough that the upper bass range remains full and impactful at normal listening volumes.\u003c\/p\u003e\n\u003cp\u003eFor competition and SQL builds where scoring frequencies are typically in the 40-63Hz range depending on the class, port tuning can be raised toward 38-45Hz to maximize output in the scored range at the cost of sub-bass extension below 35Hz. This tradeoff is deliberate and appropriate for competition use. The system is optimized for the measurement, not for general musical listening.\u003c\/p\u003e\n\u003cp\u003eFor extreme sub-bass builds targeting the lowest possible extension, including subsonic bass below 30Hz used in some SQL formats and movie soundtrack playback, port tuning below 30Hz extends reach at the cost of upper bass output and requires careful filtering to prevent over-excursion below the tuning point. Proline X enclosures for this application include subsonic filter recommendations on the product page to prevent driver damage.\u003c\/p\u003e\n\u003ch2\u003ePort Design, Why Size and Shape Matter\u003c\/h2\u003e\n\u003cp\u003ePort area and length are as important as tuning frequency, and generic enclosures consistently get this wrong. A port that's too small in cross-sectional area produces audible chuffing, which is turbulent airflow through the port, at high excursion levels. Chuffing sounds like a rhythmic whooshing noise that increases with volume and is a clear indicator that the port is undersized for the driver's output capability.\u003c\/p\u003e\n\u003cp\u003eProline X ported enclosures use large-diameter round ports or slot ports calculated from the driver's maximum excursion and the port velocity limits that produce laminar rather than turbulent airflow. Port area is not an approximation. It's a calculated minimum derived from the driver's Xmax and the enclosure's tuning target. The result is a ported enclosure that maintains clean, quiet airflow at the maximum output levels the driver can produce, which is the standard that a purpose-built enclosure should meet.\u003c\/p\u003e\n\u003ch2\u003eDownfire Configuration\u003c\/h2\u003e\n\u003cp\u003eSeveral Proline X ported enclosures in this collection are available in downfire configuration. The subwoofer faces downward toward the vehicle floor rather than rearward toward the trunk opening. Downfire placement changes the acoustic loading on the driver, using the vehicle floor as a boundary that reinforces low-frequency output and distributes bass more evenly throughout the cabin.\u003c\/p\u003e\n\u003cp\u003eDownfire enclosures are particularly well suited to SUV and hatchback builds where the cargo area opens directly to the passenger cabin. The downward-facing driver produces a more omnidirectional bass pattern that fills the interior more evenly than a rearward-facing driver in the same location. They're also a practical choice for builds where the enclosure faces the back seats and the driver's output would otherwise be aimed directly at passengers rather than into the cabin generally.\u003c\/p\u003e\n\u003ch2\u003eConstruction Standards\u003c\/h2\u003e\n\u003cp\u003eEvery Proline X ported enclosure is built from Langboard Elite MDF (48.5 lb\/ft³ density, 200 psi internal bond strength), the highest-grade MDF available for enclosure construction. No thin-wall panels, no particle board, no cost-cutting on structural components. Internal bracing is placed at intervals calculated to prevent panel resonance at the frequencies the enclosure operates in. All joints are glued and fastened for airtight construction. A ported enclosure with air leaks in the cabinet walls loses the acoustic benefit of the port tuning and produces distorted, inefficient bass output.\u003c\/p\u003e\n\u003cp\u003eThe CNC manufacturing process ensures every panel dimension, port opening, and baffle cutout is repeatable to within 0.005 inches. There is no variation between units of the same model, which means the tuning is consistent and the performance is predictable. Terminal cups accept up to 8 AWG wire for high-current applications.\u003c\/p\u003e\n\u003ch2\u003eMatching the Right Enclosure to Your Amplifier\u003c\/h2\u003e\n\u003cp\u003ePorted enclosures are more sensitive to amplifier power than sealed designs. The efficiency gain of a well-tuned ported box means a given amplifier produces more acoustic output, which also means that a poorly matched or underpowered amplifier is more audible in a ported system than in a sealed one. Match your amplifier's RMS output to the driver's RMS rating at the correct impedance, and use a subsonic filter set to approximately 10Hz below the port tuning frequency to prevent over-excursion below the enclosure's operating range.\u003c\/p\u003e\n\u003cp\u003eA subsonic filter is not optional in a ported system running significant power. Below the port tuning frequency, the driver unloads and cone excursion increases rapidly with no acoustic output to show for it. Without a subsonic filter, bass content below the tuning point drives the cone to its excursion limit and beyond. This is the most common cause of ported subwoofer failure in systems that are otherwise correctly matched.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Ported Subwoofer Box Questions\u003c\/h2\u003e\n\u003ch3\u003eIs a ported subwoofer box louder than a sealed box?\u003c\/h3\u003e\n\u003cp\u003eYes, by approximately 3 dB on average and significantly more at the port tuning frequency. The tuned port adds acoustic output to the driver's cone output in the same frequency range, producing more SPL per watt of amplifier power. For builds where loudness is the priority, ported is the right alignment. For builds where accuracy and transient response are the priority, sealed is the better choice.\u003c\/p\u003e\n\u003ch3\u003eWhat port tuning frequency should I choose?\u003c\/h3\u003e\n\u003cp\u003eFor daily musical listening, 33-38Hz produces the best balance of deep extension and upper bass output. For competition SQL builds with scoring in the 40-63Hz range, 38-45Hz tuning maximizes output in the scored range. For extreme sub-bass builds with content below 30Hz, port tuning below 30Hz extends reach but requires careful subsonic filtering. The right tuning frequency is driven by the driver's characteristics and the listening goals, not a generic default.\u003c\/p\u003e\n\u003ch3\u003eWhy do I need a subsonic filter with a ported box?\u003c\/h3\u003e\n\u003cp\u003eBelow the port tuning frequency, the air mass in the port stops loading the driver and the cone effectively unloads. Excursion increases rapidly with no acoustic output to show for it. Without a subsonic filter, bass content below the tuning point drives the cone past its excursion limit, which is the most common cause of ported subwoofer failure. Set the subsonic filter to approximately 10Hz below the enclosure's port tuning frequency.\u003c\/p\u003e\n\u003ch3\u003eWhat's port chuffing and how do I avoid it?\u003c\/h3\u003e\n\u003cp\u003ePort chuffing is the audible whooshing noise produced when air moves through a port faster than laminar flow allows, typically at high excursion levels. It's a clear indicator that the port is undersized for the driver's output capability. The solution is correct port area calculated from the driver's Xmax and the target port velocity limit. Proline X ported enclosures use port dimensions calculated to maintain laminar airflow at the maximum output levels the driver can produce.\u003c\/p\u003e\n\u003ch3\u003eWhat's the difference between Performance Series and Performance Optimized ported boxes?\u003c\/h3\u003e\n\u003cp\u003ePerformance Series ported boxes are universal-fit, with internal volume and port tuning calculated for the typical driver in the size class. Performance Optimized ported boxes are tuned to specific driver models (Arc Audio, JL Audio, Image Dynamics, Ground Zero) using the driver's published Thiele-Small parameters. The Performance Optimized series produces more output and tighter alignment with the matched driver. The Performance Series gives flexibility to use any driver in the size class.\u003c\/p\u003e\n\u003ch3\u003eWhat size amplifier do I need for a ported sub box?\u003c\/h3\u003e\n\u003cp\u003eMatch your amplifier's RMS output at your wired impedance to the subwoofer's RMS rating. Ported enclosures are more sensitive to amplifier matching than sealed designs because the efficiency gain amplifies any underpowering or clipping. A monoblock amplifier matched cleanly to the driver's RMS rating at the final wired impedance is the standard approach. Always include a subsonic filter set 10Hz below the port tuning frequency.\u003c\/p\u003e\n\u003ch3\u003eWhat exact materials prevent your cabinets from flexing?\u003c\/h3\u003e\n\u003cp\u003eWe assemble our cabinets with true industrial-grade wood glue and tight dado joinery. This heavy-duty bracing ensures that the inner pressure waves cannot flex the walls, preserving all mechanical energy for pure acoustic bass output.\u003c\/p\u003e\n\u003ch3\u003eCan I install a shallow-mount subwoofer inside a vented box?\u003c\/h3\u003e\n\u003cp\u003eMost shallow-mount drivers are specifically engineered for tiny, sealed environments due to their limited mechanical travel. Mounting them inside a highly efficient vented setup can cause over-excursion, which will quickly damage the voice coils unless you precisely limit your amplifier's subsonic filter settings.\u003c\/p\u003e\n\u003ch3\u003eWhat specific tuning frequencies do your standard vented units feature?\u003c\/h3\u003e\n\u003cp\u003eOur universal pre-fabricated vented models are engineered with a clean 36Hz target tuning. This frequency delivers the most versatile curve, allowing for excellent low-end rumble on modern tracks while maintaining plenty of kick-drum response for rock and metal.\u003c\/p\u003e\n\u003ch3\u003eHow does a dual-chamber box differ from a single large shared space?\u003c\/h3\u003e\n\u003cp\u003eA dual-chamber design completely separates the air volume for each individual driver. This physical division guarantees that if one subwoofer experiences a technical issue or wire failure, the remaining driver will not fail.\u003c\/p\u003e\n\u003ch2\u003ePrefer Accuracy Over Output?\u003c\/h2\u003e\n\u003cp\u003eIf your priority is tight, transient-accurate bass rather than maximum SPL, see our \u003ca href=\"https:\/\/audiointensity.com\/collections\/sealed-subwoofer-boxes\"\u003esealed subwoofer boxes\u003c\/a\u003e . Airtight enclosures tuned for SQ-focused builds.\u003c\/p\u003e\n\u003c\/div\u003e","products":[{"product_id":"proline-x-p12-p-single-12-ported-subwoofer-enclosure-v3","title":"Proline X P12-P | Single 12\" Ported Subwoofer Enclosure | V3","description":"\u003cstyle\u003e\n .px-desc {\n font-family: 'Helvetica Neue', Arial, sans-serif;\n line-height: 1.8;\n color: #1e293b;\n max-width: 1200px;\n margin: 0 auto;\n background: #ffffff;\n }\n\n .px-hero {\n background: linear-gradient(135deg, #0f172a 0%, #0e7490 100%);\n padding: 60px 40px;\n text-align: center;\n color: white;\n }\n\n .px-hero .px-title {\n font-size: 2.6em;\n font-weight: 800;\n text-transform: uppercase;\n letter-spacing: 2px;\n margin: 0 0 10px 0;\n color: white;\n }\n\n .px-hero .px-subtitle {\n font-size: 1.2em;\n font-weight: 300;\n opacity: 0.9;\n margin: 0 0 30px 0;\n }\n\n .px-badges {\n display: flex;\n justify-content: center;\n flex-wrap: wrap;\n gap: 12px;\n margin-top: 20px;\n }\n\n .px-badge {\n background: rgba(6, 182, 212, 0.2);\n border: 1px solid #06b6d4;\n color: #67e8f9;\n padding: 8px 20px;\n border-radius: 20px;\n font-size: 0.9em;\n font-weight: 600;\n letter-spacing: 0.5px;\n }\n\n .px-section {\n padding: 50px 40px;\n border-bottom: 1px solid #e2e8f0;\n background: #ffffff;\n }\n\n .px-section:nth-child(even) {\n background: #f0f9ff;\n }\n\n .px-section h2 {\n color: #0e7490;\n font-size: 2em;\n font-weight: 700;\n margin: 0 0 20px 0;\n padding-bottom: 12px;\n border-bottom: 3px solid #06b6d4;\n }\n\n .px-section h3 {\n color: #0f172a;\n font-size: 1.4em;\n font-weight: 600;\n margin: 30px 0 15px 0;\n }\n\n .px-section p {\n font-size: 1.05em;\n color: #334155;\n margin-bottom: 18px;\n }\n\n .px-section ul {\n margin: 15px 0;\n padding-left: 25px;\n }\n\n .px-section li {\n font-size: 1.05em;\n color: #334155;\n margin-bottom: 10px;\n line-height: 1.7;\n }\n\n .px-grid {\n display: grid;\n grid-template-columns: repeat(2, 1fr);\n gap: 24px;\n margin: 30px 0;\n }\n\n .px-card {\n background: #ffffff;\n border: 1px solid #e2e8f0;\n border-top: 4px solid #06b6d4;\n border-radius: 6px;\n padding: 24px;\n }\n\n .px-card h4 {\n color: #0e7490;\n font-size: 1.15em;\n font-weight: 700;\n margin: 0 0 12px 0;\n }\n\n .px-card p {\n font-size: 1em;\n color: #475569;\n margin: 0;\n line-height: 1.7;\n }\n\n .px-highlight {\n background: #f0f9ff;\n border-left: 5px solid #06b6d4;\n padding: 24px 28px;\n margin: 28px 0;\n border-radius: 0 6px 6px 0;\n }\n\n .px-highlight h3 {\n color: #0e7490;\n margin: 0 0 12px 0;\n font-size: 1.2em;\n }\n\n .px-highlight p {\n margin-bottom: 10px;\n color: #1e293b;\n }\n\n .px-cta {\n background: linear-gradient(135deg, #0f172a 0%, #0e7490 100%);\n padding: 60px 40px;\n text-align: center;\n color: white;\n }\n\n .px-cta h2 {\n font-size: 2.2em;\n font-weight: 700;\n margin: 0 0 20px 0;\n color: white;\n border: none;\n padding: 0;\n }\n\n .px-cta p {\n font-size: 1.15em;\n opacity: 0.92;\n max-width: 800px;\n margin: 0 auto 20px auto;\n color: white;\n }\n\n .px-driver-link {\n display: inline-block;\n background: #f0f9ff;\n border: 2px solid #06b6d4;\n border-radius: 6px;\n padding: 16px 24px;\n margin: 10px 10px 10px 0;\n text-decoration: none;\n color: #0e7490;\n font-weight: 700;\n font-size: 1em;\n transition: all 0.2s ease;\n }\n\n .px-driver-link:hover {\n background: #06b6d4;\n color: white;\n }\n\n @media (max-width: 768px) {\n .px-hero { padding: 40px 20px; }\n .px-hero .px-title { font-size: 1.8em; }\n .px-section { padding: 30px 20px; }\n .px-section h2 { font-size: 1.6em; }\n .px-grid { grid-template-columns: 1fr; }\n .px-cta { padding: 40px 20px; }\n .px-cta h2 { font-size: 1.6em; }\n }\n\u003c\/style\u003e\n\n\u003cdiv class=\"px-desc\"\u003e\n\n \u003c!-- Hero --\u003e\n \u003cdiv class=\"px-hero\"\u003e\n \u003cp class=\"px-title\"\u003eProline X P12-P\u003c\/p\u003e\n \u003cp class=\"px-subtitle\"\u003eSingle 12\" Ported Subwoofer Enclosure | V3\u003c\/p\u003e\n \u003cdiv class=\"px-badges\"\u003e\n \u003cspan class=\"px-badge\"\u003e1.5 ft³ Net\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003e36Hz Tuning\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003ePorted Bass Reflex\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003e7.25\" Max Depth\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- Introduction --\u003e\n \u003cdiv class=\"px-section\"\u003e\n \u003ch2\u003eMaximum Output From a Single 12\". Deep, Efficient, Properly Tuned.\u003c\/h2\u003e\n \u003cp\u003eThe \u003cstrong\u003eProline X P12-P\u003c\/strong\u003e is a single 12\" slot-ported enclosure built for installs that need the most output a single 12\" driver can produce. At \u003cstrong\u003e1.5 ft³ net\u003c\/strong\u003e and tuned to \u003cstrong\u003e36Hz\u003c\/strong\u003e, this enclosure gives a 12\" driver the air space and port geometry to operate at its efficiency peak, strong output from the upper bass range down into the low 30s, with a response curve that performs across music genres without being optimized for just one application.\u003c\/p\u003e\n \u003cp\u003eAt \u003cstrong\u003e19.5\" wide, 14.5\" tall, and 15.5\" deep\u003c\/strong\u003e, the P12-P is sized for a standard trunk build. The 15.5\" depth is the critical dimension. Measure your available trunk depth before ordering. The \u003cstrong\u003e7.25\" max mounting depth\u003c\/strong\u003e covers most standard 12\" drivers. Port geometry is CNC-cut to exact dimensions. Tuning is consistent unit to unit with no hand-cut variance in port length or cross-section.\u003c\/p\u003e\n \u003cp\u003eEvery panel is CNC-cut from \u003cstrong\u003eLangboard Elite MDF\u003c\/strong\u003e to exact internal volume and assembled by hand in our Tennessee facility. A single recessed \u003cstrong\u003eABS\/Carbon Fiber Composite terminal cup\u003c\/strong\u003e handles wiring, pre-wired with \u003cstrong\u003e12g OFC speaker wire\u003c\/strong\u003e. Finish options are Dark Gray Trunkliner or Plush Black. Shipping is included.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003c!-- Why Ported --\u003e\n \u003cdiv class=\"px-section\"\u003e\n \u003ch2\u003eWhy Ported at 36Hz for a Single 12\"\u003c\/h2\u003e\n \u003cp\u003eA sealed 12\" at 1.25 ft³ produces accurate, controlled bass with a flat response. The P12-P trades some of that precision for significantly more output and lower frequency extension, the correct tradeoff when the install goal is impact, room-pressurizing bass, and maximum efficiency from the 12\" format. The ported alignment at \u003cstrong\u003e36Hz\u003c\/strong\u003e pushes the efficiency peak into the upper sub-bass range where the majority of bass content in music lives, and where a sealed 12\" cannot compete on output at the same power level.\u003c\/p\u003e\n \u003cp\u003eAt 1.5 ft³, the P12-P gives the driver adequate air space in a ported alignment without the box becoming impractical for a standard trunk install. Port velocity stays controlled at this volume, no chuffing, no audible port noise at real-world listening levels. The driver operates in its correctly-sized ported range and the port is sized to match the enclosure volume.\u003c\/p\u003e\n \u003cdiv class=\"px-grid\"\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eExtended Low-Frequency Output\u003c\/h4\u003e\n \u003cp\u003ePorted alignment at 36Hz extends usable bass output significantly lower than the sealed P12-S. The P12-P produces audible, impactful output well below 40Hz. Output levels the sealed version cannot approach at the same amplifier power level.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eHigher Efficiency Per Watt\u003c\/h4\u003e\n \u003cp\u003ePorted enclosures convert amplifier power to acoustic output more efficiently than sealed designs near the tuning frequency. More output from the same amplifier, the 12\" format in ported alignment is one of the most efficient bass configurations in car audio.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eReduced Driver Excursion at Tuning\u003c\/h4\u003e\n \u003cp\u003eAt and near 36Hz, the port handles the acoustic load and driver excursion drops significantly. Less mechanical stress on the driver at the frequencies where high-excursion 12\" motors are most vulnerable to over-excursion at sustained high power levels.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003e36Hz: General-Purpose Tuning\u003c\/h4\u003e\n \u003cp\u003e36Hz provides strong output through the upper sub-bass without port velocity issues on a properly sized 12\" enclosure. A genre-agnostic tuning point that performs across hip-hop, rock, and electronic equally, not tuned for one application at the expense of others.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- Construction --\u003e\n \u003cdiv class=\"px-section\"\u003e\n \u003ch2\u003eConstruction: CNC-Cut Port Geometry, Consistent Tuning Every Unit\u003c\/h2\u003e\n \u003cp\u003eThe P12-P uses the same Langboard Elite MDF and V-groove and dado joinery construction as every enclosure in the Proline X Performance Series. The port geometry, length, cross-section, and position, is CNC-cut to exact dimensions. Tuning frequency does not vary between units. Every P12-P performs identically to spec.\u003c\/p\u003e\n\n \u003ch3\u003eLangboard Elite MDF, Named, Verified, Documented\u003c\/h3\u003e\n \u003cp\u003eEvery panel is cut from \u003cstrong\u003eLangboard Elite MDF: 3\/4\" (18mm)\u003c\/strong\u003e, a named, mill-documented panel stock produced in the United States. The specifications below are pulled directly from Langboard's published mill data.\u003c\/p\u003e\n\n \u003cdiv class=\"px-highlight\"\u003e\n \u003ch3\u003eLangboard Elite: Published Mill Data\u003c\/h3\u003e\n \u003cp\u003e\u003cstrong\u003eDensity:\u003c\/strong\u003e 48.5 lbs\/ft³, higher density means less porosity, better screw retention, and reduced resonance\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eInternal Bond:\u003c\/strong\u003e 200 psi, resistance to delamination under sustained bass pressure cycling\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eModulus of Elasticity:\u003c\/strong\u003e 410,000 psi, panel stiffness under load; less flex means less resonance\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eFace Screw Holding:\u003c\/strong\u003e 325 lbs, baffle hardware stays locked under vibration\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eEdge Screw Holding:\u003c\/strong\u003e 250 lbs, joint integrity at every panel edge connection\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003ch3\u003eV-Groove and Dado Joinery\u003c\/h3\u003e\n \u003cp\u003eEvery panel joint uses \u003cstrong\u003eV-groove and dado joinery\u003c\/strong\u003e, CNC-cut interlocking grooves that mechanically lock panels before adhesive is applied. Port panels are joined with the same interlocking geometry as the enclosure walls, airtight, consistent, and resistant to shear forces at the joint level regardless of adhesive condition over time.\u003c\/p\u003e\n\n \u003ch3\u003eIn-House ABS\/Carbon Fiber Composite Terminal Cup\u003c\/h3\u003e\n \u003cp\u003eThe terminal cup is built in-house at our Tennessee facility. The \u003cstrong\u003eABS\/Carbon Fiber Composite recessed cup\u003c\/strong\u003e features stainless steel hardware, aluminum landing plates, and copper ring terminals, pre-wired with \u003cstrong\u003e12g OFC speaker wire\u003c\/strong\u003e. The recessed mount protects terminals from cargo contact. Copper ring terminals provide a clean, corrosion-resistant connection that does not loosen under vibration.\u003c\/p\u003e\n\n \u003cdiv class=\"px-grid\"\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eCNC-Cut Port Geometry\u003c\/h4\u003e\n \u003cp\u003ePort length, cross-section, and position are machine-cut to exact dimensions on ShopSabre CNC routers. Tuning frequency is consistent unit to unit. No hand-cut variance in port dimensions means every P12-P performs identically.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eHand-Assembled in Tennessee\u003c\/h4\u003e\n \u003cp\u003eEvery enclosure is hand-assembled at our Tennessee facility and inspected before it ships. No overseas manufacturing. No batch assembly shortcuts.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eDark Gray Trunkliner or Plush Black\u003c\/h4\u003e\n \u003cp\u003eBoth finish options are professionally applied. Dark Gray Trunkliner blends with factory trunk materials. Plush Black delivers the traditional aftermarket look. Both are durably bonded for long-term wear.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eShipping Included\u003c\/h4\u003e\n \u003cp\u003eNo freight charges at checkout. The price you see is the price you pay. The enclosure ships assembled and ready to install.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- Fitment --\u003e\n \u003cdiv class=\"px-section\"\u003e\n \u003ch2\u003eFitment Guide\u003c\/h2\u003e\n \u003cp\u003eThe P12-P fits in most standard sedan and truck trunk configurations. At \u003cstrong\u003e19.5\"W x 14.5\"H x 15.5\"D\u003c\/strong\u003e, the 15.5\" depth is the critical dimension. Deeper than the sealed P12-S. Measure your available trunk depth before ordering.\u003c\/p\u003e\n\n \u003ch3\u003eDimensional Specifications\u003c\/h3\u003e\n \u003cdiv class=\"px-highlight\"\u003e\n \u003cp\u003e\u003cstrong\u003eExternal Dimensions:\u003c\/strong\u003e 19.5\" W x 14.5\" H x 15.5\" D\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eNet Internal Volume:\u003c\/strong\u003e 1.5 ft³\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eTuning Frequency:\u003c\/strong\u003e 36Hz\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eSubwoofer Cutout:\u003c\/strong\u003e 11.15\"\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eMax Mounting Depth:\u003c\/strong\u003e 7.25\"\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eFront Panel Thickness:\u003c\/strong\u003e 0.75\" Single Baffle\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003ch3\u003eDriver Compatibility\u003c\/h3\u003e\n \u003cp\u003eThe P12-P accommodates any 12\" subwoofer with a cutout diameter at or below \u003cstrong\u003e11.15\"\u003c\/strong\u003e and a mounting depth at or below \u003cstrong\u003e7.25\"\u003c\/strong\u003e. Verify both dimensions against your driver's published specifications before ordering.\u003c\/p\u003e\n\n \u003ch3\u003eCompatible Drivers\u003c\/h3\u003e\n \u003cp\u003eThe following drivers are available from Audio Intensity and are compatible with the P12-P:\u003c\/p\u003e\n \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/prodigy-audio-12-inch-subwoofer-nb2-series\"\u003eProdigy NB2-12D4 \u003c\/a\u003e\n \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/image-dynamics-id12-v4-12-inch-subwoofer\"\u003eImage Dynamics ID12 V4 \u003c\/a\u003e\n \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/prodigy-audio-12-inch-subwoofer-nb3-series\"\u003eProdigy NB3-12D4 \u003c\/a\u003e\n \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/arc-audio-arc-series-12-subwoofer\"\u003eArc Audio ARC12 D2 \u003c\/a\u003e\n \u003cp style=\"font-size:0.9em; color:#64748b; margin-top:12px;\"\u003eAlways verify cutout diameter and mounting depth against your specific driver's published specifications before ordering.\u003c\/p\u003e\n\n \u003ch3\u003eIdeal Install Applications\u003c\/h3\u003e\n \u003cdiv class=\"px-grid\"\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eStandard Trunk Build\u003c\/h4\u003e\n \u003cp\u003eAt 19.5\" wide and 15.5\" deep, the P12-P fits in most standard sedan and truck trunk configurations. The 15.5\" depth requires more trunk space than the sealed P12-S. Measure your available depth before ordering.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eMaximum Single 12\" Output\u003c\/h4\u003e\n \u003cp\u003eFor builds where the P12-S sealed is not enough output, the P12-P is the direct step up. Same driver compatibility, significantly more output and lower frequency extension from the ported alignment at 36Hz.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eDaily High-Output Systems\u003c\/h4\u003e\n \u003cp\u003eThe 36Hz tuning and 1.5 ft³ volume produce a bass response that works across music genres at high output levels without requiring system-specific tuning. A strong general-purpose single 12\" ported platform for daily high-output use.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eStep Up From 10\" Builds\u003c\/h4\u003e\n \u003cp\u003eFor installs running a single 10\" ported that need more output and deeper extension, the P12-P is the natural step up. More cone area, more volume, more output from a similarly sized trunk footprint.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- CTA --\u003e\n \u003cdiv class=\"px-cta\"\u003e\n \u003ch2\u003eMaximum 12\" Output. Tennessee-Built. Shipping Included.\u003c\/h2\u003e\n \u003cp\u003eThe Proline X P12-P is a single 12\" ported enclosure built to a spec, not a price point. Langboard Elite MDF. V-groove and dado joinery. CNC-cut port geometry. In-house terminal cup. Hand-assembled in Tennessee and inspected before it ships.\u003c\/p\u003e\n \u003cp\u003eIf you need the most output a single 12\" driver can produce from a standard trunk footprint. This is the correct enclosure. \u003cstrong\u003e$219.99 Dark Gray Trunkliner. $229.99 Plush Black.\u003c\/strong\u003e Shipping included.\u003c\/p\u003e\n \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Dark Gray Trunkliner","offer_id":43157658239065,"sku":"P12-P G","price":219.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black","offer_id":43157658271833,"sku":"P12-P B","price":229.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/products\/proline-x-performance-p12-p-ported-enclosure-for-12-subwooferssubwoofer-enclosuresproline-x-818300.jpg?v=1761969149"},{"product_id":"proline-x-p10d-p-dual-10-ported-subwoofer-enclosure-v3","title":"Proline X P10D-P | Dual 10\" Ported Subwoofer Enclosure | V3","description":"\u003cstyle\u003e\n .px-desc {\n font-family: 'Helvetica Neue', Arial, sans-serif;\n line-height: 1.8;\n color: #1e293b;\n max-width: 1200px;\n margin: 0 auto;\n background: #ffffff;\n }\n\n .px-hero {\n background: linear-gradient(135deg, #0f172a 0%, #0e7490 100%);\n padding: 60px 40px;\n text-align: center;\n color: white;\n }\n\n .px-hero .px-title {\n font-size: 2.6em;\n font-weight: 800;\n text-transform: uppercase;\n letter-spacing: 2px;\n margin: 0 0 10px 0;\n color: white;\n }\n\n .px-hero .px-subtitle {\n font-size: 1.2em;\n font-weight: 300;\n opacity: 0.9;\n margin: 0 0 30px 0;\n }\n\n .px-badges {\n display: flex;\n justify-content: center;\n flex-wrap: wrap;\n gap: 12px;\n margin-top: 20px;\n }\n\n .px-badge {\n background: rgba(6, 182, 212, 0.2);\n border: 1px solid #06b6d4;\n color: #67e8f9;\n padding: 8px 20px;\n border-radius: 20px;\n font-size: 0.9em;\n font-weight: 600;\n letter-spacing: 0.5px;\n }\n\n .px-section {\n padding: 50px 40px;\n border-bottom: 1px solid #e2e8f0;\n background: #ffffff;\n }\n\n .px-section:nth-child(even) {\n background: #f0f9ff;\n }\n\n .px-section h2 {\n color: #0e7490;\n font-size: 2em;\n font-weight: 700;\n margin: 0 0 20px 0;\n padding-bottom: 12px;\n border-bottom: 3px solid #06b6d4;\n }\n\n .px-section h3 {\n color: #0f172a;\n font-size: 1.4em;\n font-weight: 600;\n margin: 30px 0 15px 0;\n }\n\n .px-section p {\n font-size: 1.05em;\n color: #334155;\n margin-bottom: 18px;\n }\n\n .px-section ul {\n margin: 15px 0;\n padding-left: 25px;\n }\n\n .px-section li {\n font-size: 1.05em;\n color: #334155;\n margin-bottom: 10px;\n line-height: 1.7;\n }\n\n .px-grid {\n display: grid;\n grid-template-columns: repeat(2, 1fr);\n gap: 24px;\n margin: 30px 0;\n }\n\n .px-card {\n background: #ffffff;\n border: 1px solid #e2e8f0;\n border-top: 4px solid #06b6d4;\n border-radius: 6px;\n padding: 24px;\n }\n\n .px-card h4 {\n color: #0e7490;\n font-size: 1.15em;\n font-weight: 700;\n margin: 0 0 12px 0;\n }\n\n .px-card p {\n font-size: 1em;\n color: #475569;\n margin: 0;\n line-height: 1.7;\n }\n\n .px-highlight {\n background: #f0f9ff;\n border-left: 5px solid #06b6d4;\n padding: 24px 28px;\n margin: 28px 0;\n border-radius: 0 6px 6px 0;\n }\n\n .px-highlight h3 {\n color: #0e7490;\n margin: 0 0 12px 0;\n font-size: 1.2em;\n }\n\n .px-highlight p {\n margin-bottom: 10px;\n color: #1e293b;\n }\n\n .px-cta {\n background: linear-gradient(135deg, #0f172a 0%, #0e7490 100%);\n padding: 60px 40px;\n text-align: center;\n color: white;\n }\n\n .px-cta h2 {\n font-size: 2.2em;\n font-weight: 700;\n margin: 0 0 20px 0;\n color: white;\n border: none;\n padding: 0;\n }\n\n .px-cta p {\n font-size: 1.15em;\n opacity: 0.92;\n max-width: 800px;\n margin: 0 auto 20px auto;\n color: white;\n }\n\n .px-driver-link {\n display: inline-block;\n background: #f0f9ff;\n border: 2px solid #06b6d4;\n border-radius: 6px;\n padding: 16px 24px;\n margin: 10px 10px 10px 0;\n text-decoration: none;\n color: #0e7490;\n font-weight: 700;\n font-size: 1em;\n transition: all 0.2s ease;\n }\n\n .px-driver-link:hover {\n background: #06b6d4;\n color: white;\n }\n\n @media (max-width: 768px) {\n .px-hero { padding: 40px 20px; }\n .px-hero .px-title { font-size: 1.8em; }\n .px-section { padding: 30px 20px; }\n .px-section h2 { font-size: 1.6em; }\n .px-grid { grid-template-columns: 1fr; }\n .px-cta { padding: 40px 20px; }\n .px-cta h2 { font-size: 1.6em; }\n }\n\u003c\/style\u003e\n\n\u003cdiv class=\"px-desc\"\u003e\n\n \u003c!-- Hero --\u003e\n \u003cdiv class=\"px-hero\"\u003e\n \u003cp class=\"px-title\"\u003eProline X P10D-P\u003c\/p\u003e\n \u003cp class=\"px-subtitle\"\u003eDual 10\" Ported Subwoofer Enclosure | V3\u003c\/p\u003e\n \u003cdiv class=\"px-badges\"\u003e\n \u003cspan class=\"px-badge\"\u003e2.25 ft³ Net\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003e36Hz Tuning\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003ePorted Bass Reflex\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003e8\" Max Depth\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- Introduction --\u003e\n \u003cdiv class=\"px-section\"\u003e\n \u003ch2\u003eDual 10\" Ported Output. Built for Installs That Need Serious Low-End.\u003c\/h2\u003e\n \u003cp\u003eThe \u003cstrong\u003eProline X P10D-P\u003c\/strong\u003e is a dual 10\" slot-ported enclosure built for installs that need maximum output and deep low-frequency extension. At \u003cstrong\u003e2.25 ft³ net\u003c\/strong\u003e and tuned to \u003cstrong\u003e36Hz\u003c\/strong\u003e, this enclosure gives two 10\" drivers the combined air space and port geometry to perform at their efficiency peak. The combined cone area of two 10\" drivers in ported alignment produces output that fills large vehicles and dedicated listening spaces, output that requires a single 12\" or 15\" in a ported box to match, at significantly more enclosure depth.\u003c\/p\u003e\n \u003cp\u003eAt \u003cstrong\u003e28\" wide, 12.5\" tall, and 17.5\" deep\u003c\/strong\u003e, the P10D-P is a dedicated trunk build. The 17.5\" depth is the critical dimension. This enclosure requires a trunk installation. Measure your available trunk depth before ordering. The \u003cstrong\u003e8\" max mounting depth\u003c\/strong\u003e covers most standard and high-excursion 10\" drivers. A single terminal cup handles both drivers internally. Both must be run at the same impedance.\u003c\/p\u003e\n \u003cp\u003eEvery panel is CNC-cut from \u003cstrong\u003eLangboard Elite MDF\u003c\/strong\u003e to exact internal volume and assembled by hand in our Tennessee facility. Port geometry is CNC-cut to exact dimensions. Tuning is consistent unit to unit. Finish options are Dark Gray Trunkliner or Plush Black. Shipping is included.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003c!-- Why Ported --\u003e\n \u003cdiv class=\"px-section\"\u003e\n \u003ch2\u003eWhy Dual 10\" Ported at 36Hz\u003c\/h2\u003e\n \u003cp\u003eTwo 10\" drivers in ported alignment at 36Hz is a configuration built for one purpose: maximum output from the 10\" driver format. The combined cone area approaches a single 15\", and the ported alignment at 36Hz pushes that combined output into the upper sub-bass range where the efficiency peak delivers the most audible impact. The result is output that competes with single large-driver ported builds while maintaining the transient characteristics that larger drivers sacrifice at equivalent output levels.\u003c\/p\u003e\n \u003cp\u003eAt 2.25 ft³ net, each driver has adequate air space to operate efficiently in ported alignment without port velocity becoming an issue at real-world listening levels. Both drivers are working the same correctly-sized acoustic load at the same tuning frequency, consistent output, consistent port behavior, consistent response across the full output range of the enclosure.\u003c\/p\u003e\n \u003cdiv class=\"px-grid\"\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eMaximum Dual 10\" Output\u003c\/h4\u003e\n \u003cp\u003eTwo 10\" drivers in ported alignment at 36Hz produce the highest output available from the 10\" driver format. Combined cone area approaches a single 15\" while maintaining the transient speed advantage the 10\" format delivers over larger drivers.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003e36Hz Tuning: Deep and Controlled\u003c\/h4\u003e\n \u003cp\u003e36Hz places the port output peak in the upper sub-bass range where bass impact is most audible. Strong output from the mid-30s through the upper bass range without port velocity issues at the 2.25 ft³ volume this enclosure provides.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003e2.25 ft³: Correctly Sized\u003c\/h4\u003e\n \u003cp\u003eEach driver has adequate air space in ported alignment. Port velocity stays controlled at listening levels. Both drivers operate efficiently at the 36Hz tuning point without the enclosure working against them.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eWide Bass Dispersion\u003c\/h4\u003e\n \u003cp\u003eTwo drivers spaced across a 28\" baffle produce a wider, more even bass presentation than a single driver of any size. Low-frequency output is distributed more evenly across the full cabin width.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- Construction --\u003e\n \u003cdiv class=\"px-section\"\u003e\n \u003ch2\u003eConstruction: CNC-Cut Port Geometry, Consistent Tuning, Single Terminal Cup\u003c\/h2\u003e\n \u003cp\u003eThe P10D-P uses the same Langboard Elite MDF and V-groove and dado joinery construction as every enclosure in the Proline X Performance Series. Port geometry is CNC-cut to exact dimensions. Port length, cross-section, and position are consistent unit to unit. A single terminal cup handles both drivers internally.\u003c\/p\u003e\n\n \u003ch3\u003eLangboard Elite MDF, Named, Verified, Documented\u003c\/h3\u003e\n \u003cp\u003eEvery panel is cut from \u003cstrong\u003eLangboard Elite MDF: 3\/4\" (18mm)\u003c\/strong\u003e, a named, mill-documented panel stock produced in the United States. The specifications below are pulled directly from Langboard's published mill data.\u003c\/p\u003e\n\n \u003cdiv class=\"px-highlight\"\u003e\n \u003ch3\u003eLangboard Elite: Published Mill Data\u003c\/h3\u003e\n \u003cp\u003e\u003cstrong\u003eDensity:\u003c\/strong\u003e 48.5 lbs\/ft³, higher density means less porosity, better screw retention, and reduced resonance\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eInternal Bond:\u003c\/strong\u003e 200 psi, resistance to delamination under sustained bass pressure cycling\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eModulus of Elasticity:\u003c\/strong\u003e 410,000 psi, panel stiffness under load; less flex means less resonance\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eFace Screw Holding:\u003c\/strong\u003e 325 lbs, baffle hardware stays locked under vibration\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eEdge Screw Holding:\u003c\/strong\u003e 250 lbs, joint integrity at every panel edge connection\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003ch3\u003eV-Groove and Dado Joinery\u003c\/h3\u003e\n \u003cp\u003eEvery panel joint uses \u003cstrong\u003eV-groove and dado joinery\u003c\/strong\u003e, CNC-cut interlocking grooves that mechanically lock panels before adhesive is applied. Port panels are joined with the same interlocking geometry as the enclosure walls, airtight, consistent, and resistant to shear forces at the joint level. On an enclosure 17.5\" deep and 28\" wide, joint integrity across every panel is critical to maintaining the acoustic seal and structural rigidity under sustained high-output use.\u003c\/p\u003e\n\n \u003ch3\u003eSingle Terminal Cup: Same Impedance Required\u003c\/h3\u003e\n \u003cp\u003eThe P10D-P uses a single \u003cstrong\u003eABS\/Carbon Fiber Composite recessed terminal cup\u003c\/strong\u003e built in-house at our Tennessee facility. Both drivers are wired internally to the cup with stainless steel hardware, aluminum landing plates, and copper ring terminals, pre-wired with \u003cstrong\u003e12g OFC speaker wire\u003c\/strong\u003e. Both drivers must be run at the same impedance. Confirm your amplifier output and driver impedances before wiring.\u003c\/p\u003e\n\n \u003cdiv class=\"px-grid\"\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eCNC-Cut Port Geometry\u003c\/h4\u003e\n \u003cp\u003ePort length, cross-section, and position are machine-cut to exact dimensions on ShopSabre CNC routers. Tuning frequency is consistent unit to unit. No hand-cut variance in port dimensions.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eHand-Assembled in Tennessee\u003c\/h4\u003e\n \u003cp\u003eEvery enclosure is hand-assembled at our Tennessee facility and inspected before it ships. No overseas manufacturing. No batch assembly shortcuts.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eDark Gray Trunkliner or Plush Black\u003c\/h4\u003e\n \u003cp\u003eBoth finish options are professionally applied. Dark Gray Trunkliner blends with factory trunk materials. Plush Black delivers the traditional aftermarket look. Both are durably bonded for long-term wear.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eShipping Included\u003c\/h4\u003e\n \u003cp\u003eNo freight charges at checkout. The price you see is the price you pay. The enclosure ships assembled and ready to install.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- Fitment --\u003e\n \u003cdiv class=\"px-section\"\u003e\n \u003ch2\u003eFitment Guide\u003c\/h2\u003e\n \u003cp\u003eThe P10D-P is a dedicated trunk build. At \u003cstrong\u003e28\"W x 12.5\"H x 17.5\"D\u003c\/strong\u003e, the 17.5\" depth requires a trunk installation, not a behind-seat option. Measure your available trunk depth carefully before ordering.\u003c\/p\u003e\n\n \u003ch3\u003eDimensional Specifications\u003c\/h3\u003e\n \u003cdiv class=\"px-highlight\"\u003e\n \u003cp\u003e\u003cstrong\u003eExternal Dimensions:\u003c\/strong\u003e 28\" W x 12.5\" H x 17.5\" D\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eNet Internal Volume:\u003c\/strong\u003e 2.25 ft³\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eTuning Frequency:\u003c\/strong\u003e 36Hz\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eSubwoofer Cutout:\u003c\/strong\u003e 9.25\"\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eMax Mounting Depth:\u003c\/strong\u003e 8\"\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eFront Panel Thickness:\u003c\/strong\u003e 0.75\" Single Baffle\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003ch3\u003eDriver Compatibility\u003c\/h3\u003e\n \u003cp\u003eThe P10D-P accommodates any 10\" subwoofer with a cutout diameter at or below \u003cstrong\u003e9.25\"\u003c\/strong\u003e and a mounting depth at or below \u003cstrong\u003e8\"\u003c\/strong\u003e. Both drivers must be the same model and impedance. Verify published specifications before ordering.\u003c\/p\u003e\n\n \u003ch3\u003eCompatible Drivers\u003c\/h3\u003e\n \u003cp\u003eThe following drivers are available from Audio Intensity and are compatible with the P10D-P:\u003c\/p\u003e\n \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/prodigy-audio-10-inch-subwoofer-nb2-series\"\u003eProdigy NB2-10D4 \u003c\/a\u003e\n \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/image-dynamics-id10-v4-10-inch-subwoofer\"\u003eImage Dynamics ID10 V4 \u003c\/a\u003e\n \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/prodigy-audio-10-inch-subwoofer-nb3-series\"\u003eProdigy NB3-10D4 \u003c\/a\u003e\n \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/audiomobile-gt2-2010-10-subwoofer-single\"\u003eAudiomobile GT2 2010 \u003c\/a\u003e\n \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/prodigy-audio-1000-watt-10-inch-subwoofer-nb5-series\"\u003eProdigy NB5-10D4 \u003c\/a\u003e\n \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/crescendo-revolution-710-10-inch-subwoofer\"\u003eCrescendo Revolution 710 \u003c\/a\u003e\n \u003cp style=\"font-size:0.9em; color:#64748b; margin-top:12px;\"\u003eAlways verify cutout diameter and mounting depth against your specific driver's published specifications before ordering. Both drivers must be run at the same impedance.\u003c\/p\u003e\n\n \u003ch3\u003eIdeal Install Applications\u003c\/h3\u003e\n \u003cdiv class=\"px-grid\"\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eDedicated Trunk Build\u003c\/h4\u003e\n \u003cp\u003eAt 28\" wide and 17.5\" deep, the P10D-P requires a dedicated trunk installation. The 17.5\" depth is the critical dimension. Measure your available trunk depth before ordering.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eMaximum Dual 10\" Output\u003c\/h4\u003e\n \u003cp\u003eFor builds that need the most output the 10\" driver format can deliver, the P10D-P is the correct enclosure. Two drivers in ported alignment at 36Hz produce output that competes with single large-driver builds at a fraction of the enclosure depth.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eStep Up From Sealed\u003c\/h4\u003e\n \u003cp\u003eFor builds running the P10D-S that need more output and lower frequency extension without switching driver sizes, the P10D-P is the direct step up. Same driver compatibility, significantly more output from the ported alignment.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eHigh-Output Daily Systems\u003c\/h4\u003e\n \u003cp\u003eTwo 10\" drivers in ported alignment produce output that dominates most vehicles' acoustic space at moderate amplifier power levels. A strong platform for daily high-output builds where impact and low-frequency extension are the priority.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- CTA --\u003e\n \u003cdiv class=\"px-cta\"\u003e\n \u003ch2\u003eMaximum Dual 10\" Output. Tennessee-Built. Shipping Included.\u003c\/h2\u003e\n \u003cp\u003eThe Proline X P10D-P delivers the highest output available from the dual 10\" format. Langboard Elite MDF. V-groove and dado joinery. CNC-cut port geometry. In-house terminal cup. Hand-assembled in Tennessee and inspected before it ships.\u003c\/p\u003e\n \u003cp\u003eTwo drivers. Ported efficiency. Output that competes with a single 15\", from a dedicated trunk enclosure. \u003cstrong\u003e$259.99 Dark Gray Trunkliner. $269.99 Plush Black.\u003c\/strong\u003e Shipping included.\u003c\/p\u003e\n \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Dark Gray Trunkliner","offer_id":43157607317593,"sku":"P10D-P G","price":259.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black","offer_id":43157607350361,"sku":"P10D-P B","price":269.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/products\/proline-x-performance-p10d-p-ported-enclosure-for-dual-10-subwooferssubwoofer-enclosuresproline-x-105328.jpg?v=1761969156"},{"product_id":"proline-x-p12d-p-dual-12-ported-subwoofer-enclosure-v3","title":"Proline X P12D-P | Dual 12\" Ported Subwoofer Enclosure | V3","description":"\u003cstyle\u003e\n .px-desc {\n font-family: 'Helvetica Neue', Arial, sans-serif;\n line-height: 1.8;\n color: #1e293b;\n max-width: 1200px;\n margin: 0 auto;\n background: #ffffff;\n }\n\n .px-hero {\n background: linear-gradient(135deg, #0f172a 0%, #0e7490 100%);\n padding: 60px 40px;\n text-align: center;\n color: white;\n }\n\n .px-hero .px-title {\n font-size: 2.6em;\n font-weight: 800;\n text-transform: uppercase;\n letter-spacing: 2px;\n margin: 0 0 10px 0;\n color: white;\n }\n\n .px-hero .px-subtitle {\n font-size: 1.2em;\n font-weight: 300;\n opacity: 0.9;\n margin: 0 0 30px 0;\n }\n\n .px-badges {\n display: flex;\n justify-content: center;\n flex-wrap: wrap;\n gap: 12px;\n margin-top: 20px;\n }\n\n .px-badge {\n background: rgba(6, 182, 212, 0.2);\n border: 1px solid #06b6d4;\n color: #67e8f9;\n padding: 8px 20px;\n border-radius: 20px;\n font-size: 0.9em;\n font-weight: 600;\n letter-spacing: 0.5px;\n }\n\n .px-section {\n padding: 50px 40px;\n border-bottom: 1px solid #e2e8f0;\n background: #ffffff;\n }\n\n .px-section:nth-child(even) {\n background: #f0f9ff;\n }\n\n .px-section h2 {\n color: #0e7490;\n font-size: 2em;\n font-weight: 700;\n margin: 0 0 20px 0;\n padding-bottom: 12px;\n border-bottom: 3px solid #06b6d4;\n }\n\n .px-section h3 {\n color: #0f172a;\n font-size: 1.4em;\n font-weight: 600;\n margin: 30px 0 15px 0;\n }\n\n .px-section p {\n font-size: 1.05em;\n color: #334155;\n margin-bottom: 18px;\n }\n\n .px-section ul {\n margin: 15px 0;\n padding-left: 25px;\n }\n\n .px-section li {\n font-size: 1.05em;\n color: #334155;\n margin-bottom: 10px;\n line-height: 1.7;\n }\n\n .px-grid {\n display: grid;\n grid-template-columns: repeat(2, 1fr);\n gap: 24px;\n margin: 30px 0;\n }\n\n .px-card {\n background: #ffffff;\n border: 1px solid #e2e8f0;\n border-top: 4px solid #06b6d4;\n border-radius: 6px;\n padding: 24px;\n }\n\n .px-card h4 {\n color: #0e7490;\n font-size: 1.15em;\n font-weight: 700;\n margin: 0 0 12px 0;\n }\n\n .px-card p {\n font-size: 1em;\n color: #475569;\n margin: 0;\n line-height: 1.7;\n }\n\n .px-highlight {\n background: #f0f9ff;\n border-left: 5px solid #06b6d4;\n padding: 24px 28px;\n margin: 28px 0;\n border-radius: 0 6px 6px 0;\n }\n\n .px-highlight h3 {\n color: #0e7490;\n margin: 0 0 12px 0;\n font-size: 1.2em;\n }\n\n .px-highlight p {\n margin-bottom: 10px;\n color: #1e293b;\n }\n\n .px-cta {\n background: linear-gradient(135deg, #0f172a 0%, #0e7490 100%);\n padding: 60px 40px;\n text-align: center;\n color: white;\n }\n\n .px-cta h2 {\n font-size: 2.2em;\n font-weight: 700;\n margin: 0 0 20px 0;\n color: white;\n border: none;\n padding: 0;\n }\n\n .px-cta p {\n font-size: 1.15em;\n opacity: 0.92;\n max-width: 800px;\n margin: 0 auto 20px auto;\n color: white;\n }\n\n .px-driver-link {\n display: inline-block;\n background: #f0f9ff;\n border: 2px solid #06b6d4;\n border-radius: 6px;\n padding: 16px 24px;\n margin: 10px 10px 10px 0;\n text-decoration: none;\n color: #0e7490;\n font-weight: 700;\n font-size: 1em;\n transition: all 0.2s ease;\n }\n\n .px-driver-link:hover {\n background: #06b6d4;\n color: white;\n }\n\n @media (max-width: 768px) {\n .px-hero { padding: 40px 20px; }\n .px-hero .px-title { font-size: 1.8em; }\n .px-section { padding: 30px 20px; }\n .px-section h2 { font-size: 1.6em; }\n .px-grid { grid-template-columns: 1fr; }\n .px-cta { padding: 40px 20px; }\n .px-cta h2 { font-size: 1.6em; }\n }\n\u003c\/style\u003e\n\n\u003cdiv class=\"px-desc\"\u003e\n\n \u003c!-- Hero --\u003e\n \u003cdiv class=\"px-hero\"\u003e\n \u003cp class=\"px-title\"\u003eProline X P12D-P\u003c\/p\u003e\n \u003cp class=\"px-subtitle\"\u003eDual 12\" Ported Subwoofer Enclosure | V3\u003c\/p\u003e\n \u003cdiv class=\"px-badges\"\u003e\n \u003cspan class=\"px-badge\"\u003e2.75 ft³ Net\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003e36Hz Tuning\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003ePorted Bass Reflex\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003e7.125\" Max Depth\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- Introduction --\u003e\n \u003cdiv class=\"px-section\"\u003e\n \u003ch2\u003eDual 12\" Ported Output. The Highest Output Configuration in the Performance Series.\u003c\/h2\u003e\n \u003cp\u003eThe \u003cstrong\u003eProline X P12D-P\u003c\/strong\u003e is a dual 12\" slot-ported enclosure built for installs that demand maximum output and deep low-frequency extension. At \u003cstrong\u003e2.75 ft³ net\u003c\/strong\u003e and tuned to \u003cstrong\u003e36Hz\u003c\/strong\u003e, this enclosure gives two 12\" drivers the combined air space and port geometry to produce output at the top end of what the Performance Series delivers. Two 12\" drivers in ported alignment at 36Hz produce combined output that fills large vehicles and dedicated listening spaces. Output that requires custom fabrication or a purpose-built SPL setup to exceed.\u003c\/p\u003e\n \u003cp\u003eAt \u003cstrong\u003e32\" wide, 15\" tall, and 15.3\" deep\u003c\/strong\u003e, the P12D-P is a dedicated trunk build. Both the 32\" width and 15.3\" depth are critical dimensions. Measure your available trunk space carefully before ordering. The \u003cstrong\u003e7.125\" max mounting depth\u003c\/strong\u003e covers the majority of standard 12\" drivers. A single terminal cup handles both drivers internally. Both must be run at the same impedance.\u003c\/p\u003e\n \u003cp\u003eEvery panel is CNC-cut from \u003cstrong\u003eLangboard Elite MDF\u003c\/strong\u003e to exact internal volume and assembled by hand in our Tennessee facility. Port geometry is CNC-cut to exact dimensions. Tuning is consistent unit to unit. Finish options are Dark Gray Trunkliner or Plush Black. Shipping is included.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003c!-- Why Ported --\u003e\n \u003cdiv class=\"px-section\"\u003e\n \u003ch2\u003eWhy Dual 12\" Ported at 36Hz\u003c\/h2\u003e\n \u003cp\u003eThe dual 12\" ported configuration at 36Hz is the highest-output enclosure in the Performance Series lineup. Two 12\" drivers in ported alignment produce combined output that exceeds what most single large-format drivers in ported enclosures can match at equivalent amplifier power levels. The 36Hz tuning point places the port output peak in the upper sub-bass range, where impact is most audible and where the combined efficiency of two ported drivers reaches its maximum.\u003c\/p\u003e\n \u003cp\u003eAt 2.75 ft³ net, each driver has adequate air space to operate efficiently in ported alignment. Port velocity is controlled at this volume, no chuffing, no audible port noise at real-world listening levels. Both drivers operate at the same correctly-sized acoustic load at the same tuning frequency, which produces consistent output and consistent port behavior across the full output range of the enclosure.\u003c\/p\u003e\n \u003cdiv class=\"px-grid\"\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eMaximum Performance Series Output\u003c\/h4\u003e\n \u003cp\u003eTwo 12\" drivers in ported alignment at 36Hz represent the peak output configuration in the Performance Series. Combined efficiency at the tuning point produces bass output that no other enclosure in the lineup approaches.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003e36Hz: Deep and Impactful\u003c\/h4\u003e\n \u003cp\u003e36Hz places the efficiency peak at the upper sub-bass range where bass impact is most audible. Strong output from the mid-30s through the upper bass range without port velocity issues at the 2.75 ft³ volume this enclosure provides.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003e2.75 ft³: Room to Breathe\u003c\/h4\u003e\n \u003cp\u003eEach driver has adequate air space in ported alignment. Port velocity stays controlled at real-world listening levels. Both drivers operate efficiently at 36Hz without the enclosure working against them or port noise becoming audible.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eWide Bass Dispersion\u003c\/h4\u003e\n \u003cp\u003eTwo drivers spaced across a 32\" baffle produce the widest bass dispersion in the Performance Series ported lineup. Low-frequency output is distributed evenly across the full cabin width at output levels that demand it.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- Construction --\u003e\n \u003cdiv class=\"px-section\"\u003e\n \u003ch2\u003eConstruction: Maximum Volume, CNC-Cut Port Geometry, Single Terminal Cup\u003c\/h2\u003e\n \u003cp\u003eThe P12D-P uses the same Langboard Elite MDF and V-groove and dado joinery construction as every enclosure in the Proline X Performance Series. At 32\" wide and 15.3\" deep, this is the largest enclosure in the Performance Series lineup. Joint integrity and panel rigidity across every panel are critical at this scale. Port geometry is CNC-cut to exact dimensions. A single terminal cup handles both drivers internally.\u003c\/p\u003e\n\n \u003ch3\u003eLangboard Elite MDF, Named, Verified, Documented\u003c\/h3\u003e\n \u003cp\u003eEvery panel is cut from \u003cstrong\u003eLangboard Elite MDF: 3\/4\" (18mm)\u003c\/strong\u003e, a named, mill-documented panel stock produced in the United States. The specifications below are pulled directly from Langboard's published mill data.\u003c\/p\u003e\n\n \u003cdiv class=\"px-highlight\"\u003e\n \u003ch3\u003eLangboard Elite: Published Mill Data\u003c\/h3\u003e\n \u003cp\u003e\u003cstrong\u003eDensity:\u003c\/strong\u003e 48.5 lbs\/ft³, higher density means less porosity, better screw retention, and reduced resonance\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eInternal Bond:\u003c\/strong\u003e 200 psi, resistance to delamination under sustained bass pressure cycling\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eModulus of Elasticity:\u003c\/strong\u003e 410,000 psi, panel stiffness under load; less flex means less resonance\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eFace Screw Holding:\u003c\/strong\u003e 325 lbs, baffle hardware stays locked under vibration\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eEdge Screw Holding:\u003c\/strong\u003e 250 lbs, joint integrity at every panel edge connection\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003ch3\u003eV-Groove and Dado Joinery\u003c\/h3\u003e\n \u003cp\u003eEvery panel joint uses \u003cstrong\u003eV-groove and dado joinery\u003c\/strong\u003e, CNC-cut interlocking grooves that mechanically lock panels before adhesive is applied. On the largest enclosure in the Performance Series lineup, joint integrity across 32\" wide panels and 15.3\" deep side walls is the difference between an enclosure that holds its acoustic performance over years of sustained high-output use and one that does not. Every joint on the P12D-P is mechanically locked before adhesive is applied.\u003c\/p\u003e\n\n \u003ch3\u003eSingle Terminal Cup: Same Impedance Required\u003c\/h3\u003e\n \u003cp\u003eThe P12D-P uses a single \u003cstrong\u003eABS\/Carbon Fiber Composite recessed terminal cup\u003c\/strong\u003e built in-house at our Tennessee facility. Both drivers are wired internally to the cup with stainless steel hardware, aluminum landing plates, and copper ring terminals, pre-wired with \u003cstrong\u003e12g OFC speaker wire\u003c\/strong\u003e. Both drivers must be run at the same impedance. Confirm your amplifier output and driver impedances before wiring.\u003c\/p\u003e\n\n \u003cdiv class=\"px-grid\"\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eCNC-Cut Port Geometry\u003c\/h4\u003e\n \u003cp\u003ePort length, cross-section, and position are machine-cut to exact dimensions on ShopSabre CNC routers. Tuning frequency is consistent unit to unit. No hand-cut variance in port dimensions across the largest enclosure in the lineup.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eHand-Assembled in Tennessee\u003c\/h4\u003e\n \u003cp\u003eEvery enclosure is hand-assembled at our Tennessee facility and inspected before it ships. No overseas manufacturing. No batch assembly shortcuts. Regardless of enclosure size.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eDark Gray Trunkliner or Plush Black\u003c\/h4\u003e\n \u003cp\u003eBoth finish options are professionally applied. Dark Gray Trunkliner blends with factory trunk materials. Plush Black delivers the traditional aftermarket look. Both are durably bonded for long-term wear.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eShipping Included\u003c\/h4\u003e\n \u003cp\u003eNo freight charges at checkout. The price you see is the price you pay. The enclosure ships assembled and ready to install.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- Fitment --\u003e\n \u003cdiv class=\"px-section\"\u003e\n \u003ch2\u003eFitment Guide\u003c\/h2\u003e\n \u003cp\u003eThe P12D-P is the largest enclosure in the Performance Series. At \u003cstrong\u003e32\"W x 15\"H x 15.3\"D\u003c\/strong\u003e, both the width and depth are critical dimensions. This is a dedicated trunk build. Measure both dimensions carefully before ordering.\u003c\/p\u003e\n\n \u003ch3\u003eDimensional Specifications\u003c\/h3\u003e\n \u003cdiv class=\"px-highlight\"\u003e\n \u003cp\u003e\u003cstrong\u003eExternal Dimensions:\u003c\/strong\u003e 32\" W x 15\" H x 15.3\" D\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eNet Internal Volume:\u003c\/strong\u003e 2.75 ft³\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eTuning Frequency:\u003c\/strong\u003e 36Hz\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eSubwoofer Cutout:\u003c\/strong\u003e 11.15\"\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eMax Mounting Depth:\u003c\/strong\u003e 7.125\"\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eFront Panel Thickness:\u003c\/strong\u003e 0.75\" Single Baffle\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003ch3\u003eDriver Compatibility\u003c\/h3\u003e\n \u003cp\u003eThe P12D-P accommodates any 12\" subwoofer with a cutout diameter at or below \u003cstrong\u003e11.15\"\u003c\/strong\u003e and a mounting depth at or below \u003cstrong\u003e7.125\"\u003c\/strong\u003e. Both drivers must be the same model and impedance. Verify published specifications before ordering.\u003c\/p\u003e\n\n \u003ch3\u003eCompatible Drivers\u003c\/h3\u003e\n \u003cp\u003eThe following drivers are available from Audio Intensity and are compatible with the P12D-P:\u003c\/p\u003e\n \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/prodigy-audio-12-inch-subwoofer-nb2-series\"\u003eProdigy NB2-12D4 \u003c\/a\u003e\n \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/image-dynamics-id12-v4-12-inch-subwoofer\"\u003eImage Dynamics ID12 V4 \u003c\/a\u003e\n \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/prodigy-audio-12-inch-subwoofer-nb3-series\"\u003eProdigy NB3-12D4 \u003c\/a\u003e\n \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/arc-audio-arc-series-12-subwoofer\"\u003eArc Audio ARC12 D2 \u003c\/a\u003e\n \u003cp style=\"font-size:0.9em; color:#64748b; margin-top:12px;\"\u003eAlways verify cutout diameter and mounting depth against your specific driver's published specifications before ordering. Both drivers must be run at the same impedance.\u003c\/p\u003e\n\n \u003ch3\u003eIdeal Install Applications\u003c\/h3\u003e\n \u003cdiv class=\"px-grid\"\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eDedicated Trunk Build\u003c\/h4\u003e\n \u003cp\u003eAt 32\" wide and 15.3\" deep, the P12D-P requires a dedicated trunk installation with adequate space for both dimensions. Measure your available trunk width and depth before ordering. Both are critical.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eMaximum Performance Series Output\u003c\/h4\u003e\n \u003cp\u003eThe P12D-P is the highest-output enclosure in the Performance Series lineup. For builds where maximum output from a production enclosure is the goal: this is the correct choice.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eLarge Vehicle High-Output Systems\u003c\/h4\u003e\n \u003cp\u003eFull-size sedans, trucks, and SUVs with adequate trunk dimensions are the natural home for the P12D-P. The combined output of two 12\" drivers in ported alignment fills large acoustic spaces that smaller configurations cannot pressurize effectively.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eStep Up From Sealed\u003c\/h4\u003e\n \u003cp\u003eFor builds running the P12D-S that need significantly more output and lower frequency extension, the P12D-P is the direct step up. Same driver compatibility, the full output advantage of ported alignment at 36Hz.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- CTA --\u003e\n \u003cdiv class=\"px-cta\"\u003e\n \u003ch2\u003eMaximum Dual 12\" Output. Tennessee-Built. Shipping Included.\u003c\/h2\u003e\n \u003cp\u003eThe Proline X P12D-P is the highest-output enclosure in the Performance Series. Langboard Elite MDF. V-groove and dado joinery. CNC-cut port geometry. In-house terminal cup. Hand-assembled in Tennessee and inspected before it ships.\u003c\/p\u003e\n \u003cp\u003eTwo drivers. Ported efficiency. The peak output configuration in the Proline X Performance Series lineup. \u003cstrong\u003e$269.99 Dark Gray Trunkliner. $279.99 Plush Black.\u003c\/strong\u003e Shipping included.\u003c\/p\u003e\n \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Dark Gray Trunkliner","offer_id":43157680455769,"sku":"P12D-P G","price":269.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black","offer_id":43157680488537,"sku":"P12D-P B","price":279.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/products\/proline-x-performance-p12d-p-ported-enclosure-for-dual-12-subwooferssubwoofer-enclosuresproline-x-723960.jpg?v=1761969165"},{"product_id":"proline-x-professional-series-enclosure-for-single-kickersolo-x-12","title":"Kicker Solo-Baric L7X 12 Box: Ported 12\" Professional Series Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica 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class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Enclosure | X Series | Fits Kicker Solo X 12\" Subwoofer\u003c\/h2\u003e\n  \u003cp\u003eAudio Intensity and Proline X are not affiliated with Kicker. This enclosure is built to the published parameters of the Kicker Solo-Baric L7X.\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e3.00 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 38.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003e2.25\" three-layer baffle\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Kicker Solo-Baric L7X 12\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 38.5 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe Solo-Baric L7X 12 carries the biggest Sd of the three smaller L7X sizes, and this cabinet gives it 3.00 cubic feet net, vented at 38.5 Hz through a 72.5 square inch slot. It is the third size in the professional Kicker line, sized for one driver.\u003c\/p\u003e\n  \u003cp\u003eF3 lands at 31.9 Hz on this airspace, and passband ripple holds at 5.20 dB, comfortably inside the ceiling we hold new designs to. The port stays under the chuff threshold up to 2400 W, above which the mouth velocity crosses Kicker's own reference. Set the subsonic filter at 24 Hz and leave it there below tuning.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe cabinet\u003c\/h3\u003e\n  \u003cp\u003e32.00\" W x 16.00\" H x 21.88\" D external, internally braced. It ships as a UPS parcel; the price includes shipping in the 48 states.\u003c\/p\u003e\n  \u003cp\u003eThis is our single-twelve envelope, sized for one L7X 12 only. The baffle cutout is machined to the L7X's square frame, which is not cross-compatible with round-frame drivers of the same nominal size. You source the driver. We handle the box.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe numbers to respect\u003c\/h3\u003e\n  \u003cp\u003eKicker's own Klippel rig measured the L7X 12 under SKU 49L7X122, and the Dual 2 Ohm coil is the one they publish; the cabinet fits either the D1 or D2 version of this driver. Kicker publishes no outer frame dimension for the L7X, so the frame OD used here, 12.5625 inches, is estimated from the published cutout; Kicker's own driver sheet also mislabels the L7X 12's cutout under a CompVX row, so the L7X owner's manual is the source used here instead. Audio Intensity and Proline X are not affiliated with Kicker.\u003c\/p\u003e\n  \u003cp\u003eThis cabinet is 3.00 cubic feet net, with a slot port of 72.5 square inches tuned to 38.5 Hz; the port stays under the chuff threshold at 2400 W, the design power basis.\u003c\/p\u003e\n  \u003cp\u003eSet a 30 Hz subsonic filter, 24 dB per octave. Below tuning the vent stops loading the cone; with the filter in place the cone reaches 12.1 mm of its 31.2 mm at 2400 W.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"None - Carpet Only","offer_id":43165514334297,"sku":"Pro12-P KIK NA","price":602.99,"currency_code":"USD","in_stock":true},{"title":"Standard - Hex and Flag","offer_id":43165514367065,"sku":"Pro12-P KIK HEX","price":632.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/proline-x-enclosure-x-series-fits-kicker-solo-x-8-subwoofersubwoofer-enclosuresproline-x-9950209.jpg?v=1774479103"},{"product_id":"proline-x-6-5-ported-mdf-subwoofer-enclosure","title":"Proline X P6-P | Single 6.5\" Ported Subwoofer Enclosure | V3","description":"\u003cstyle\u003e\n .px-desc {\n font-family: 'Helvetica Neue', Arial, sans-serif;\n line-height: 1.8;\n color: #1e293b;\n max-width: 1200px;\n margin: 0 auto;\n background: #ffffff;\n }\n\n .px-hero {\n background: linear-gradient(135deg, #0f172a 0%, #0e7490 100%);\n padding: 60px 40px;\n text-align: center;\n color: white;\n }\n\n .px-hero .px-title {\n font-size: 2.6em;\n font-weight: 800;\n text-transform: uppercase;\n letter-spacing: 2px;\n margin: 0 0 10px 0;\n color: white;\n }\n\n .px-hero .px-subtitle {\n font-size: 1.2em;\n font-weight: 300;\n opacity: 0.9;\n margin: 0 0 30px 0;\n }\n\n .px-badges {\n display: flex;\n justify-content: center;\n flex-wrap: wrap;\n gap: 12px;\n margin-top: 20px;\n }\n\n .px-badge {\n background: rgba(6, 182, 212, 0.2);\n border: 1px solid #06b6d4;\n color: #67e8f9;\n padding: 8px 20px;\n border-radius: 20px;\n font-size: 0.9em;\n font-weight: 600;\n letter-spacing: 0.5px;\n }\n\n .px-section {\n padding: 50px 40px;\n border-bottom: 1px solid #e2e8f0;\n background: #ffffff;\n }\n\n .px-section:nth-child(even) {\n background: #f0f9ff;\n }\n\n .px-section h2 {\n color: #0e7490;\n font-size: 2em;\n font-weight: 700;\n margin: 0 0 20px 0;\n padding-bottom: 12px;\n border-bottom: 3px solid #06b6d4;\n }\n\n .px-section h3 {\n color: #0f172a;\n font-size: 1.4em;\n font-weight: 600;\n margin: 30px 0 15px 0;\n }\n\n .px-section p {\n font-size: 1.05em;\n color: #334155;\n margin-bottom: 18px;\n }\n\n .px-section ul {\n margin: 15px 0;\n padding-left: 25px;\n }\n\n .px-section li {\n font-size: 1.05em;\n color: #334155;\n margin-bottom: 10px;\n line-height: 1.7;\n }\n\n .px-grid {\n display: grid;\n grid-template-columns: repeat(2, 1fr);\n gap: 24px;\n margin: 30px 0;\n }\n\n .px-card {\n background: #ffffff;\n border: 1px solid #e2e8f0;\n border-top: 4px solid #06b6d4;\n border-radius: 6px;\n padding: 24px;\n }\n\n .px-card h4 {\n color: #0e7490;\n font-size: 1.15em;\n font-weight: 700;\n margin: 0 0 12px 0;\n }\n\n .px-card p {\n font-size: 1em;\n color: #475569;\n margin: 0;\n line-height: 1.7;\n }\n\n .px-highlight {\n background: #f0f9ff;\n border-left: 5px solid #06b6d4;\n padding: 24px 28px;\n margin: 28px 0;\n border-radius: 0 6px 6px 0;\n }\n\n .px-highlight h3 {\n color: #0e7490;\n margin: 0 0 12px 0;\n font-size: 1.2em;\n }\n\n .px-highlight p {\n margin-bottom: 10px;\n color: #1e293b;\n }\n\n .px-cta {\n background: linear-gradient(135deg, #0f172a 0%, #0e7490 100%);\n padding: 60px 40px;\n text-align: center;\n color: white;\n }\n\n .px-cta h2 {\n font-size: 2.2em;\n font-weight: 700;\n margin: 0 0 20px 0;\n color: white;\n border: none;\n padding: 0;\n }\n\n .px-cta p {\n font-size: 1.15em;\n opacity: 0.92;\n max-width: 800px;\n margin: 0 auto 20px auto;\n color: white;\n }\n\n .px-driver-link {\n display: inline-block;\n background: #f0f9ff;\n border: 2px solid #06b6d4;\n border-radius: 6px;\n padding: 16px 24px;\n margin: 10px 10px 10px 0;\n text-decoration: none;\n color: #0e7490;\n font-weight: 700;\n font-size: 1em;\n transition: all 0.2s ease;\n }\n\n .px-driver-link:hover {\n background: #06b6d4;\n color: white;\n }\n\n @media (max-width: 768px) {\n .px-hero { padding: 40px 20px; }\n .px-hero .px-title { font-size: 1.8em; }\n .px-section { padding: 30px 20px; }\n .px-section h2 { font-size: 1.6em; }\n .px-grid { grid-template-columns: 1fr; }\n .px-cta { padding: 40px 20px; }\n .px-cta h2 { font-size: 1.6em; }\n }\n\u003c\/style\u003e\n\n\u003cdiv class=\"px-desc\"\u003e\n\n \u003c!-- Hero --\u003e\n \u003cdiv class=\"px-hero\"\u003e\n \u003cp class=\"px-title\"\u003eProline X P6-P\u003c\/p\u003e\n \u003cp class=\"px-subtitle\"\u003eSingle 6.5\" Ported Subwoofer Enclosure | V3\u003c\/p\u003e\n \u003cdiv class=\"px-badges\"\u003e\n \u003cspan class=\"px-badge\"\u003e0.30 ft³ Net\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003e38Hz Tuning\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003ePorted Bass Reflex\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003e1.5\" Double Baffle\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- Introduction --\u003e\n \u003cdiv class=\"px-section\"\u003e\n \u003ch2\u003eBuilt for the Install That Has No Room for Compromise\u003c\/h2\u003e\n \u003cp\u003eThe \u003cstrong\u003eProline X P6-P\u003c\/strong\u003e is a single 6.5\" slot-ported enclosure engineered for installs where space is the primary constraint but output is still a requirement. A 6.5\" driver in a properly tuned ported box at \u003cstrong\u003e38Hz\u003c\/strong\u003e produces real, audible bass, not the thin, overworked low-end you get from a 6.5\" running full-range through a factory system. This enclosure gives that driver the air space and port geometry it needs to perform at its efficiency peak.\u003c\/p\u003e\n \u003cp\u003eAt \u003cstrong\u003e16\" wide, 8\" tall, and 10.75\" deep\u003c\/strong\u003e, the P6-P fits behind seats, under cargo floors, and in door-adjacent trunk positions that a 10\" or 12\" enclosure could never reach. It is the right tool for compact vehicles, rear deck builds, and stealth installs where the box has to disappear into the vehicle while the bass does not.\u003c\/p\u003e\n \u003cp\u003eThis is not a box built to a price point. Every panel is CNC-cut from \u003cstrong\u003eLangboard Elite MDF\u003c\/strong\u003e to exact internal volume, assembled by hand in our Tennessee facility, and finished in your choice of Dark Gray Trunkliner or Plush Black. Shipping is included.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003c!-- Why Ported --\u003e\n \u003cdiv class=\"px-section\"\u003e\n \u003ch2\u003eWhy Ported at 38Hz for a 6.5\" Driver\u003c\/h2\u003e\n \u003cp\u003ePorted alignment on a small driver is a deliberate engineering choice, not a compromise. A sealed 6.5\" enclosure produces tight, accurate bass but rolls off quickly below 60Hz, audible, but not impactful. A ported enclosure tuned to \u003cstrong\u003e38Hz\u003c\/strong\u003e extends usable output significantly lower, allowing the driver to produce bass that you feel, not just hear.\u003c\/p\u003e\n \u003cp\u003eAt 38Hz, port output peaks at a frequency that covers the majority of kick drum fundamentals, bass guitar low notes, and the upper sub-bass range in electronic music. The driver works less at and below tuning, excursion is minimized where port output is maximized, which protects the driver and improves efficiency simultaneously.\u003c\/p\u003e\n \u003cdiv class=\"px-grid\"\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eExtended Low-Frequency Output\u003c\/h4\u003e\n \u003cp\u003ePorted alignment extends usable bass output to frequencies a sealed box of equal volume cannot reach. The P6-P produces audible output below 40Hz. Territory most 6.5\" sealed enclosures cannot access.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eHigher Efficiency\u003c\/h4\u003e\n \u003cp\u003ePorted enclosures convert amplifier power to acoustic output more efficiently than sealed designs. The P6-P gets more output per watt, which matters in compact installs where amplifier headroom is often limited.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eReduced Driver Excursion at Tuning\u003c\/h4\u003e\n \u003cp\u003eAt and near 38Hz, the port handles the acoustic load. Driver excursion drops significantly. This reduces mechanical stress on the driver at the frequencies where small drivers are most vulnerable.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003e38Hz: The Right Tuning Point\u003c\/h4\u003e\n \u003cp\u003e38Hz provides strong output through the upper sub-bass and bass range without the port velocity issues that come with tuning too low on a compact driver. It is a general-purpose tuning that works across music genres without being optimized for just one.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- Construction --\u003e\n \u003cdiv class=\"px-section\"\u003e\n \u003ch2\u003eConstruction: What Separates Proline X From the Rest\u003c\/h2\u003e\n \u003cp\u003eMost enclosures in this size category are built to hit a retail price point. Panel thickness is reduced, joinery is simplified to butt joints, and MDF is sourced from wherever is cheapest that week. The result is boxes that flex under pressure, lose their acoustic seal over time, and sound progressively worse as the joints loosen. The P6-P is built to a different standard.\u003c\/p\u003e\n\n \u003ch3\u003eLangboard Elite MDF, Named, Verified, Documented\u003c\/h3\u003e\n \u003cp\u003eEvery panel in the P6-P is cut from \u003cstrong\u003eLangboard Elite MDF: 3\/4\" (18mm)\u003c\/strong\u003e, a named, mill-documented panel stock produced in the United States. Most manufacturers source generic MDF and describe it as \"high-density\" or \"premium\" without any supporting data. We name our panel stock because naming it holds us accountable to the spec.\u003c\/p\u003e\n\n \u003cdiv class=\"px-highlight\"\u003e\n \u003ch3\u003eLangboard Elite: Published Mill Data\u003c\/h3\u003e\n \u003cp\u003e\u003cstrong\u003eDensity:\u003c\/strong\u003e 48.5 lbs\/ft³, higher density means less porosity, better screw retention, and reduced resonance\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eInternal Bond:\u003c\/strong\u003e 200 psi, resistance to delamination under sustained bass pressure cycling\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eModulus of Elasticity:\u003c\/strong\u003e 410,000 psi, panel stiffness under load; less flex means less resonance\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eFace Screw Holding:\u003c\/strong\u003e 325 lbs, baffle hardware stays locked under vibration\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eEdge Screw Holding:\u003c\/strong\u003e 250 lbs, joint integrity at every panel edge connection\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003ch3\u003eV-Groove and Dado Joinery\u003c\/h3\u003e\n \u003cp\u003eThe P6-P uses \u003cstrong\u003eV-groove and dado joinery\u003c\/strong\u003e, CNC-cut interlocking grooves that mechanically lock every panel before adhesive is applied. A dado joint cuts a groove into one panel that accepts the edge of the adjoining panel, creating a tongue-and-groove style mechanical interlock. The result is a joint that resists shear forces mechanically, not just through glue strength. Every corner is locked. Every seam is airtight. The box does not flex.\u003c\/p\u003e\n\n \u003ch3\u003e1.5\" Double Baffle\u003c\/h3\u003e\n \u003cp\u003eThe front panel on the P6-P is a \u003cstrong\u003e1.5\" double baffle\u003c\/strong\u003e: two layers of 3\/4\" Langboard Elite MDF laminated together at the front panel. This is the panel that takes the most mechanical stress: it holds the driver, absorbs motor vibration, and maintains the acoustic seal at the cutout. At 1.5\" thickness it does not flex, does not resonate at driver frequencies, and holds mounting hardware with the grip of a solid panel rather than a thin baffle that loosens over time.\u003c\/p\u003e\n\n \u003ch3\u003eIn-House ABS\/Carbon Fiber Composite Terminal Cup\u003c\/h3\u003e\n \u003cp\u003eThe terminal cup on the P6-P is built in-house at our Tennessee facility, not sourced from a generic hardware catalog. The \u003cstrong\u003eABS\/Carbon Fiber Composite recessed cup\u003c\/strong\u003e features stainless steel hardware, aluminum landing plates, and copper ring terminals, pre-wired internally with \u003cstrong\u003e12g OFC speaker wire\u003c\/strong\u003e. The recessed mount protects the terminals from cargo contact. The copper ring terminals ensure a clean, corrosion-resistant connection that does not loosen over time.\u003c\/p\u003e\n\n \u003cdiv class=\"px-grid\"\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eShopSabre CNC Routers\u003c\/h4\u003e\n \u003cp\u003eEvery panel is machine-cut on ShopSabre industrial CNC routers. Consistent geometry, no hand-cut variance, no gaps at the joints. Panel #1 and panel #500 are dimensionally identical.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eHand-Assembled in Tennessee\u003c\/h4\u003e\n \u003cp\u003eCNC cutting is only half the process. Every enclosure is hand-assembled at our Tennessee facility and inspected before it ships. No overseas manufacturing. No batch assembly shortcuts.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eDark Gray Trunkliner or Plush Black\u003c\/h4\u003e\n \u003cp\u003eBoth finish options are professionally applied. Dark Gray Trunkliner matches factory trunk materials for a stealth install. Plush Black provides the traditional aftermarket aesthetic. Both are durable and bonded for long-term wear.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eShipping Included\u003c\/h4\u003e\n \u003cp\u003eNo freight charges at checkout. The price you see is the price you pay. The enclosure ships assembled and ready to install.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- Fitment --\u003e\n \u003cdiv class=\"px-section\"\u003e\n \u003ch2\u003eFitment Guide\u003c\/h2\u003e\n \u003cp\u003eThe P6-P is sized for installs where larger enclosures simply will not fit. At \u003cstrong\u003e16\"W x 8\"H x 10.75\"D\u003c\/strong\u003e it occupies a footprint smaller than most factory spare tire wells and fits behind the rear seat of virtually every compact vehicle on the market.\u003c\/p\u003e\n\n \u003ch3\u003eDimensional Specifications\u003c\/h3\u003e\n \u003cdiv class=\"px-highlight\"\u003e\n \u003cp\u003e\u003cstrong\u003eExternal Dimensions:\u003c\/strong\u003e 16\" W x 8\" H x 10.75\" D\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eNet Internal Volume:\u003c\/strong\u003e 0.30 ft³\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eTuning Frequency:\u003c\/strong\u003e 38Hz\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eSubwoofer Cutout:\u003c\/strong\u003e 5.95\"\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eMax Mounting Depth:\u003c\/strong\u003e 7.25\"\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eFront Panel Thickness:\u003c\/strong\u003e 1.5\" Double Baffle\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003ch3\u003eDriver Compatibility\u003c\/h3\u003e\n \u003cp\u003eThe P6-P accommodates any 6.5\" subwoofer with a cutout diameter at or below \u003cstrong\u003e5.95\"\u003c\/strong\u003e and a mounting depth at or below \u003cstrong\u003e7.25\"\u003c\/strong\u003e. Verify both dimensions against your driver's published specifications before ordering.\u003c\/p\u003e\n\n \u003ch3\u003eCompatible Driver\u003c\/h3\u003e\n \u003cp\u003eThe following driver is available from Audio Intensity and has been verified for fitment in the P6-P:\u003c\/p\u003e\n \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/triton-sx6d4-6-5-dual-4-ohm-subwoofer\"\u003eTriton SX6D4, 6.5\" Dual 4-Ohm Subwoofer \u003c\/a\u003e\n \u003cp style=\"font-size:0.9em; color:#64748b; margin-top:12px;\"\u003eNote: The Proline X 6\" subwoofer will be available shortly and will replace this recommendation once live.\u003c\/p\u003e\n\n \u003ch3\u003eIdeal Install Applications\u003c\/h3\u003e\n \u003cdiv class=\"px-grid\"\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eBehind Rear Seat\u003c\/h4\u003e\n \u003cp\u003eAt 8\" tall and 10.75\" deep, the P6-P fits behind the rear seat of most compact sedans, coupes, and hatchbacks without requiring seat modification or custom fabrication.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eCompact Trunk Builds\u003c\/h4\u003e\n \u003cp\u003eThe 16\" width fits comfortably in most compact trunk configurations without blocking access to the spare tire or cargo floor latches.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eStealth Installs\u003c\/h4\u003e\n \u003cp\u003eThe compact footprint and Dark Gray Trunkliner finish make the P6-P essentially invisible in most trunk environments, the bass is present but the box is not obvious.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eDual Configuration\u003c\/h4\u003e\n \u003cp\u003eTwo P6-P enclosures side by side measure 32\" wide, a viable dual setup in most full-size sedan trunks for significantly increased output and cone area.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- CTA --\u003e\n \u003cdiv class=\"px-cta\"\u003e\n \u003ch2\u003ePrecision-Built. Tennessee-Made. Shipping Included.\u003c\/h2\u003e\n \u003cp\u003eThe Proline X P6-P is a single 6.5\" ported enclosure built to a spec, not a price point. Langboard Elite MDF. V-groove and dado joinery. 1.5\" double baffle. In-house terminal cup. Hand-assembled in Tennessee and inspected before it ships.\u003c\/p\u003e\n \u003cp\u003eIf you need real bass in a space where larger enclosures will not fit, this is the correct enclosure. \u003cstrong\u003e$149.99 Dark Gray Trunkliner. $159.99 Plush Black.\u003c\/strong\u003e Shipping included.\u003c\/p\u003e\n \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Dark Gray Trunkliner","offer_id":43142380748889,"sku":"P6-P G","price":149.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black","offer_id":43142380781657,"sku":"P6-P B","price":159.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/products\/performance-series-65-inch-subwoofer-box-portedsubwoofer-enclosuresproline-x-454254.jpg?v=1761970089"},{"product_id":"proline-x-jl-audio-13w7-ported-subwoofer-enclosure","title":"JL Audio 13W7AE Box: Ported 13\" Professional Series 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class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Professional 13\" Ported\u003c\/h2\u003e\n  \u003cp\u003eOne 13W7AE-D1.5 in JL's own recommended ported volume, 2.375 cubic feet at 34.6 Hz, on a three-layer flush-mount baffle\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e2.40 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 34.6 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 31.1 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003e2.25\" three-layer baffle\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the 13W7AE-D1.5\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e2.40\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e34.6\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e31.1\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e43.5\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 34.6 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe 13W7AE-D1.5 is the 13.5 inch of JL Audio's W7AE line: 23.5 Hz, a Qts of 0.448, 104.3 litres of Vas, dual 1.5 ohm coils rated 1500 W RMS together and 32 mm of one-way excursion from a 10.5 inch deep motor. JL recommends a 2.375 cubic foot ported box tuned to 34.6 Hz, and that is what this cabinet is: 2.40 cubic feet net behind a 2.25 inch three-layer baffle, tuned to 34.6 Hz through a 43.5 square inch slot beside the woofer, for an anechoic F3 of 31.1 Hz in a 34 by 16 by 16.4 inch front-firing box.\u003c\/p\u003e\n  \u003cp\u003eJL's own ported design uses a 2.25 by 14.5 inch slot, about 32.6 square inches. This one keeps JL's volume and tuning and opens the slot to 43.5 square inches: gated at 1800 W, 1.2 times JL's rating, the channel runs 22.5 m\/s against a 30.6 gate and the mouth 15.8 m\/s, and the cone peaks at 12.1 of its 32 mm with the subsonic filter in place. Sealed, JL's 1.875 cubic foot box is a Qtc of 0.77 with an F3 of 37.4 Hz.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhat makes it Professional\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThree-layer baffle, flush mount\u003c\/h4\u003e\n\u003cp\u003eThree layers of 3\/4 inch Langboard Elite make a 2.25 inch\n    front. The outer layer is routed to the flange, so the woofer sits flush with the face; the two layers behind it\n    carry the mounting hardware and the load.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eJL Audio logo acrylic\u003c\/h4\u003e\n\u003cp\u003eA glossy black acrylic insert with the JL Audio mark sits in the outer\n    layer beside the woofer. It is standard on every Professional cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eMounting\u003c\/h4\u003e\n\u003cp\u003eThreaded inserts pressed into the baffle on the published 12.700 inch bolt circle, stainless machine screws included.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003ePort gated at 1800 W\u003c\/h4\u003e\n\u003cp\u003eThe 43.5 square inch slot beside the woofer is sized so the\n    channel runs 22.5 metres per second and the mouth 15.8 metres per second at 1.2 times the driver's rating, under the\n    17 metres per second where a slot starts to chuff. The channel runs 9.62 inches along its wall and turns once along the back wall for another 14.49 inches, which is why a 34.6 Hz tuning fits a 16.38 inch deep box.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhy this is a Professional build\u003c\/h4\u003e\n\u003cp\u003eEvery driver is run through the Performance Optimized wedge and down-fire before this chassis; the Professional box is where a driver lands when that smaller envelope, 30 inches wide and 18 inches deep with a triangular side port, cannot give it what it needs at its rated power. The 13W7AE-D1.5 did not clear the port gate there. The calmest wedge port that fits that envelope is 16.9 square inches at 25.5 by 12.12 by 17.95 inches, and its mouth runs 22.8 metres per second at 1500 W against the 17 metres per second line where a port starts to chuff. That port would stay clean to about 835 W. The slot on this box reaches 43.5 square inches and holds the mouth at 15.8 metres per second at 1800 W.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhat the price covers\u003c\/h4\u003e\n\u003cp\u003eEvery Professional cabinet is priced the same way, by its size: this one is 5.16 cubic feet outside. Delivery to the 48 states is inside the price; it ships as a 63 lb parcel and checkout adds nothing.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhat JL Audio recommend\u003c\/h4\u003e\n\u003cp\u003eJL Audio publish a vented box for the 13W7AE at 2.38 cubic feet net, tuned to 34.6 Hz. This cabinet holds 2.40 cubic feet net and tunes to 34.6 Hz.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe cabinet\u003c\/h3\u003e\n  \u003cp\u003e34.00\" W x 16.00\" H x 16.38\" D external. Two windowed braces run front to back either side of the woofer, clearing the cutout by two and a half inches. The box ships dry: polyfill detunes a ported alignment. 34 inches wide, 16 tall and 16.4 deep. 14 inch frame, flush in the outer baffle layer, 11.9 inch mounting hole, 10.5 inches of mounting depth. It ships as a parcel.\u003c\/p\u003e\n  \u003cp\u003eJL prints a full parameter table for the W7AE line and it holds together: Qes 0.476 and Qms 7.517 reproduce the published Qts of 0.448, and 300 grams of moving mass on a 153 micrometre per newton suspension reproduce the 23.5 Hz resonance and 104 litre Vas. Frame, mounting hole, mounting depth, bolt circle and displacement are all JL's own figures; nothing on this page is an estimate.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe numbers to respect\u003c\/h3\u003e\n  \n  \u003cp\u003eSet a 27 Hz subsonic filter, 24 dB per octave. Below tuning the vent stops loading the cone; with the filter in\n  place the cone reaches 12.1 mm of its 32.0 mm at 1800 W.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":40766954111065,"sku":"Pro 13-P 13W7AE","price":547.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/Pro_13-P_13W7AE_Front.jpg?v=1790521467"},{"product_id":"skar-evl-12-subwoofer-box","title":"Skar Audio EVL-12 Box: Ported 12\" Professional Series Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:54px 36px;text-align:center;color:#fff}.df-hero h2{font-size:2.3em;font-weight:800;text-transform:uppercase;letter-spacing:1.5px;margin:0 0 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10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProfessional Series Ported 12\" Enclosure | Skar Audio EVL-12\u003c\/h2\u003e\n  \u003cp\u003eA ported twelve-inch box built around the Skar Audio EVL-12's own numbers, with the tradeoffs stated plainly\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e2.00 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 35.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003e2.25\" three-layer baffle\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Skar Audio EVL-12\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 35.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe Skar Audio EVL-12 D2 is a low-Qts, high-excursion driver, and this cabinet gives it 2.00 cubic feet net, vented at 35.0 Hz through a 36.2 square inch port. F3 lands at 29.1 Hz with 5.08 dB of passband ripple. It is the single-driver ported box in the professional Skar line.\u003c\/p\u003e\n  \u003cp\u003eThe port on this box stays clean up to 1500 W, past the coil's own 1250 W power rating, so the coil reaches its limit before the port becomes audible. Ripple across the passband holds at 5.08 dB, and the in-car curve stays essentially flat rather than peaked at either end.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe cabinet\u003c\/h3\u003e\n  \u003cp\u003e32.00\" W x 16.00\" H x 14.88\" D external, internally braced. It ships as a UPS parcel; the price includes shipping in the 48 states.\u003c\/p\u003e\n  \u003cp\u003eThis is our single-twelve ported envelope built around the EVL-12's own frame and motor depth.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe numbers to respect\u003c\/h3\u003e\n  \u003cp\u003eT\/S for the EVL-12 D2 are Skar's own published figures, carried as published rather than corrected: Skar's own Qts is off from what its own Qes and Qms would predict by about 10 percent, and Fs is off from what its own Mms and Cms would predict by about 25 percent. Skar publish no displacement figure for this driver, so the 0.14 cubic foot figure used in this build's math is estimated rather than published.\u003c\/p\u003e\n  \u003cp\u003eThis cabinet is 2.00 cubic feet net, with a slot port of 36.2 square inches tuned to 35.0 Hz; the port stays under the chuff threshold at 1500 W, the design power basis.\u003c\/p\u003e\n  \u003cp\u003eSet a 28 Hz subsonic filter, 24 dB per octave. Below tuning the vent stops loading the cone; with the filter in place the cone reaches 9.4 mm of its 23.5 mm at 1500 W.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":40987925446745,"sku":"Pro12-P Skar","price":496.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/products\/skar-evl-12-professional-series-12-inch-ported-boxproline-x-731939.jpg?v=1761970118"},{"product_id":"professional-series-12-inch-ported-box-sundown-sa-series","title":"Sundown Audio SA-12 Box: Ported 12\" Professional Series Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:54px 36px;text-align:center;color:#fff}.df-hero h2{font-size:2.3em;font-weight:800;text-transform:uppercase;letter-spacing:1.5px;margin:0 0 12px;color:#fff}.df-hero p{font-size:1.1em;font-weight:300;opacity:.93;margin:0 0 22px;color:#d6d3d1}.df-badges{display:flex;justify-content:center;flex-wrap:wrap;gap:10px}.df-badge{background:rgba(91,120,255,.18);border:1px solid #5b78ff;color:#99abff;padding:7px 16px;border-radius:18px;font-size:.8em;font-weight:600}.df-stats{display:flex;flex-wrap:wrap;background:#1c1917}.df-stat{flex:1 1 200px;text-align:center;padding:26px 16px;border-right:1px solid #292524;border-bottom:1px solid #292524}.df-stat .n{display:block;font-size:1.6em;font-weight:800;color:#7089ff}.df-stat .l{display:block;font-size:.78em;color:#a8a29e;text-transform:uppercase;letter-spacing:.6px;margin-top:5px}.df-section{padding:42px 36px;border-bottom:1px solid #292524;background:#0c0a09}.df-section:nth-of-type(even){background:#1c1917}.df-section h3{color:#fff;font-size:1.45em;font-weight:700;margin:0 0 14px;border-left:4px 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0}.df-enc-head{padding:12px 16px;font-size:.82em;font-weight:700;letter-spacing:.5px;text-transform:uppercase;color:#99abff;background:#001264}.df-enc-table{width:100%;border-collapse:collapse}.df-enc-table th{background:#0c0a09;color:#a8a29e;font-size:.78em;text-transform:uppercase;letter-spacing:.5px;padding:10px 14px;text-align:left;border-bottom:1px solid #44403c}.df-enc-table td{padding:12px 14px;border-bottom:1px solid #292524;color:#d6d3d1;font-size:.95em}.df-enc-table tr:last-child td{border-bottom:none}.df-opt td{background:#14532d;color:#fff;font-weight:600}.df-char{display:block;font-size:.78em;color:#a8a29e;font-weight:400;margin-top:2px}.df-opt .df-char{color:#86efac}.df-graph{background:#0c0a09;border:1px solid #44403c;border-radius:8px;padding:14px;margin:18px 0}.df-graph-title{font-size:.78em;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:#a8a29e;margin:0 0 10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Professional 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003eA ported twelve-inch box built to Sundown's own numbers for the SA-12, one cabinet for the Classic, the v.2 and the v.3\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.66 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 35.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 29.9 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003e2.25\" three-layer baffle\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the SA-12\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.66\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e35.0\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e29.9\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e32.6\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 35.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe Sundown Audio SA-12 has shipped in three generations, the SA-Classic 12, the SA-Series v.2 12 and the SA-Series v.3 12, in D2 and D4 coils, and all six fit this one cabinet. The box is solved for the v.3, the deepest and most powerful of the three, with a 12.84 inch frame and an 8.4 inch mounting depth, and it gives the driver 1.66 cubic feet net, vented at 35.0 Hz through a 32.6 square inch slot beside the woofer on the front face. F3 lands at 29.9 Hz with 2.74 dB of passband ripple. The 32.0 by 16.0 by 13.8 inch enclosure carries a single 90 degree bend in the port.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThreaded insert kit ships with this box.\u003c\/strong\u003e Sundown Audio does not publish the mounting hole locations for the SA-12, so we cannot install the threaded inserts before it ships. The threaded insert kit comes in the box instead: inserts sized to the woofer, the correct drill bit, 2.5 inch allen-head screws, an allen key and woofer gasket tape. You set the inserts when you mount the woofer, and this box ships with one kit.\u003c\/p\u003e\n  \u003cp\u003eSundown publishes a Qts of 0.428 for the SA-12 v.3 D2, and it agrees with their own Qes of 0.525 and Qms of 2.308. The gate here is measured at the coil's rated power, 1500 W, and the port stays clean past that rating, modeled to 1697 W before mouth velocity becomes the limiting factor. The v.2 and the Classic are rated lower, 1250 W and 1000 W, so they sit further inside the same port. Ripple across the passband holds at 2.74 dB.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhat makes it Professional\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThree-layer baffle, flush mount\u003c\/h4\u003e\n\u003cp\u003eThree layers of 3\/4 inch Langboard Elite make a 2.25 inch\n    front. The outer layer is routed to the flange, so the woofer sits flush with the face; the two layers behind it\n    carry the mounting hardware and the load.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSundown Audio logo acrylic\u003c\/h4\u003e\n\u003cp\u003eA glossy black acrylic insert with the Sundown Audio mark sits in the outer\n    layer beside the woofer. It is standard on every Professional cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThreaded insert kit ships with this box\u003c\/h4\u003e\n\u003cp\u003eThreaded insert kit included, inserts NOT pre-installed: the manufacturer publishes no mounting hole locations, so the kit ships with the box for installation when the woofer goes in: 8 to 12 inserts sized to the woofer, the correct drill bit, 2.5 inch allen-head screws, allen key and gasket tape.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003ePort gated at 1500 W\u003c\/h4\u003e\n\u003cp\u003eThe 32.6 square inch slot beside the woofer is sized so the\n    channel runs 24.5 metres per second and the mouth 15.9 metres per second at the driver's rated power, under the\n    17 metres per second where a slot starts to chuff. The channel runs 7.75 inches along its wall and turns once along the back wall for another 20.12 inches, which is why a 35.0 Hz tuning fits a 13.75 inch deep box.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhy this is a Professional build\u003c\/h4\u003e\n\u003cp\u003eEvery driver is run through the Performance Optimized wedge and down-fire before this chassis; the Professional box is where a driver lands when that smaller envelope, 30 inches wide and 18 inches deep with a triangular side port, cannot give it what it needs at its rated power. The SA-12 did not clear the port gate there. The calmest wedge port that fits that envelope is 24.7 square inches at 29.0 by 11.62 by 17.27 inches, and its mouth runs 22.4 metres per second at 1500 W against the 17 metres per second line where a port starts to chuff. That port would stay clean to about 865 W. The slot on this box reaches 32.6 square inches and holds the mouth at 15.9 metres per second at 1500 W.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhat the price covers\u003c\/h4\u003e\n\u003cp\u003eThis cabinet is 4.07 cubic feet outside. Delivery to the 48 states is inside the price; it ships as a 57 lb parcel and checkout adds nothing.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhat Sundown Audio recommend\u003c\/h4\u003e\n\u003cp\u003eSundown Audio publish a vented box for the SA-12 at 1.75 cubic feet on a basis they do not state, tuned to 35.0 Hz. This cabinet holds 1.66 cubic feet net and tunes to 35.0 Hz. They call for a port area of 26 sq in.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe cabinet\u003c\/h3\u003e\n  \u003cp\u003e32.00\" W x 16.00\" H x 13.75\" D external. Two windowed braces run front to back either side of the woofer, clearing the cutout by two and a half inches. The box ships dry: polyfill detunes a ported alignment. This is our single-twelve ported envelope built around the SA-12's frame and the v.3's motor depth, so any generation of the driver drops in. It ships as a parcel.\u003c\/p\u003e\n  \u003cp\u003eNothing about this SA-12 build needed an estimate: frame, cutout and mounting depth are Sundown's own published dimensions for each generation, and the cabinet is checked through every gate for all six coil and generation combinations. The cutout is cut for the v.3 at 11.2 inches; the Classic and v.2 baskets are within two tenths of an inch of it and their flanges cover it. Sundown Audio does not publish the mounting hole locations for the SA-12, so we cannot install the threaded inserts before it ships. The threaded insert kit comes in the box instead: inserts sized to the woofer, the correct drill bit, 2.5 inch allen-head screws, an allen key and woofer gasket tape. You set the inserts when you mount the woofer, and this box ships with one kit.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe numbers to respect\u003c\/h3\u003e\n  \n  \u003cp\u003eSet a 28 Hz subsonic filter, 24 dB per octave. Below tuning the vent stops loading the cone; with the filter in\n  place the cone reaches 9.3 mm of its 22.0 mm at 1500 W.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":40987989540953,"sku":"Pro 12-P SA12","price":399.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/Pro_12-P_SA12_Front.jpg?v=1790544056"},{"product_id":"proline-x-dual-6-5-ported-mdf-subwoofer-enclosure","title":"Proline X P6D-P | Dual 6.5\" Ported Subwoofer Enclosure | V3","description":"\u003cstyle\u003e\n .px-desc {\n font-family: 'Helvetica Neue', Arial, sans-serif;\n line-height: 1.8;\n color: #1e293b;\n max-width: 1200px;\n margin: 0 auto;\n background: #ffffff;\n }\n\n .px-hero {\n background: linear-gradient(135deg, #0f172a 0%, #0e7490 100%);\n padding: 60px 40px;\n text-align: center;\n color: white;\n }\n\n .px-hero .px-title {\n font-size: 2.6em;\n font-weight: 800;\n text-transform: uppercase;\n letter-spacing: 2px;\n margin: 0 0 10px 0;\n color: white;\n }\n\n .px-hero .px-subtitle {\n font-size: 1.2em;\n font-weight: 300;\n opacity: 0.9;\n margin: 0 0 30px 0;\n }\n\n .px-badges {\n display: flex;\n justify-content: center;\n flex-wrap: wrap;\n gap: 12px;\n margin-top: 20px;\n }\n\n .px-badge {\n background: rgba(6, 182, 212, 0.2);\n border: 1px solid #06b6d4;\n color: #67e8f9;\n padding: 8px 20px;\n border-radius: 20px;\n font-size: 0.9em;\n font-weight: 600;\n letter-spacing: 0.5px;\n }\n\n .px-section {\n padding: 50px 40px;\n border-bottom: 1px solid #e2e8f0;\n background: #ffffff;\n }\n\n .px-section:nth-child(even) {\n background: #f0f9ff;\n }\n\n .px-section h2 {\n color: #0e7490;\n font-size: 2em;\n font-weight: 700;\n margin: 0 0 20px 0;\n padding-bottom: 12px;\n border-bottom: 3px solid #06b6d4;\n }\n\n .px-section h3 {\n color: #0f172a;\n font-size: 1.4em;\n font-weight: 600;\n margin: 30px 0 15px 0;\n }\n\n .px-section p {\n font-size: 1.05em;\n color: #334155;\n margin-bottom: 18px;\n }\n\n .px-section ul {\n margin: 15px 0;\n padding-left: 25px;\n }\n\n .px-section li {\n font-size: 1.05em;\n color: #334155;\n margin-bottom: 10px;\n line-height: 1.7;\n }\n\n .px-grid {\n display: grid;\n grid-template-columns: repeat(2, 1fr);\n gap: 24px;\n margin: 30px 0;\n }\n\n .px-card {\n background: #ffffff;\n border: 1px solid #e2e8f0;\n border-top: 4px solid #06b6d4;\n border-radius: 6px;\n padding: 24px;\n }\n\n .px-card h4 {\n color: #0e7490;\n font-size: 1.15em;\n font-weight: 700;\n margin: 0 0 12px 0;\n }\n\n .px-card p {\n font-size: 1em;\n color: #475569;\n margin: 0;\n line-height: 1.7;\n }\n\n .px-highlight {\n background: #f0f9ff;\n border-left: 5px solid #06b6d4;\n padding: 24px 28px;\n margin: 28px 0;\n border-radius: 0 6px 6px 0;\n }\n\n .px-highlight h3 {\n color: #0e7490;\n margin: 0 0 12px 0;\n font-size: 1.2em;\n }\n\n .px-highlight p {\n margin-bottom: 10px;\n color: #1e293b;\n }\n\n .px-cta {\n background: linear-gradient(135deg, #0f172a 0%, #0e7490 100%);\n padding: 60px 40px;\n text-align: center;\n color: white;\n }\n\n .px-cta h2 {\n font-size: 2.2em;\n font-weight: 700;\n margin: 0 0 20px 0;\n color: white;\n border: none;\n padding: 0;\n }\n\n .px-cta p {\n font-size: 1.15em;\n opacity: 0.92;\n max-width: 800px;\n margin: 0 auto 20px auto;\n color: white;\n }\n\n .px-driver-link {\n display: inline-block;\n background: #f0f9ff;\n border: 2px solid #06b6d4;\n border-radius: 6px;\n padding: 16px 24px;\n margin: 10px 10px 10px 0;\n text-decoration: none;\n color: #0e7490;\n font-weight: 700;\n font-size: 1em;\n transition: all 0.2s ease;\n }\n\n .px-driver-link:hover {\n background: #06b6d4;\n color: white;\n }\n\n @media (max-width: 768px) {\n .px-hero { padding: 40px 20px; }\n .px-hero .px-title { font-size: 1.8em; }\n .px-section { padding: 30px 20px; }\n .px-section h2 { font-size: 1.6em; }\n .px-grid { grid-template-columns: 1fr; }\n .px-cta { padding: 40px 20px; }\n .px-cta h2 { font-size: 1.6em; }\n }\n\u003c\/style\u003e\n\n\u003cdiv class=\"px-desc\"\u003e\n\n \u003c!-- Hero --\u003e\n \u003cdiv class=\"px-hero\"\u003e\n \u003cp class=\"px-title\"\u003eProline X P6D-P\u003c\/p\u003e\n \u003cp class=\"px-subtitle\"\u003eDual 6.5\" Ported Subwoofer Enclosure | V3\u003c\/p\u003e\n \u003cdiv class=\"px-badges\"\u003e\n \u003cspan class=\"px-badge\"\u003e0.60 ft³ Net\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003e40Hz Tuning\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003ePorted Bass Reflex\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003e1.5\" Double Baffle\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- Introduction --\u003e\n \u003cdiv class=\"px-section\"\u003e\n \u003ch2\u003eTwo Drivers. One Ported Enclosure. Built for Compact Installs That Need Real Output.\u003c\/h2\u003e\n \u003cp\u003eThe \u003cstrong\u003eProline X P6D-P\u003c\/strong\u003e is a dual 6.5\" slot-ported enclosure built for installs that need the output of two drivers without the footprint of a larger single-driver box. At \u003cstrong\u003e0.60 ft³ net\u003c\/strong\u003e and tuned to \u003cstrong\u003e40Hz\u003c\/strong\u003e, this enclosure gives two 6.5\" drivers the combined air space and port geometry to produce output that a single 6.5\", sealed or ported, cannot replicate. Two drivers in a shared ported alignment produce wider dispersion, more cone area moving air, and a more even bass presentation across the vehicle cabin.\u003c\/p\u003e\n \u003cp\u003eAt \u003cstrong\u003e24\" wide, 8\" tall, and 12\" deep\u003c\/strong\u003e, the P6D-P fits across the rear floor of most compact vehicles, behind the rear seat of mid-size sedans, and in trunk positions where a single 10\" or 12\" enclosure would be too deep. It is the correct choice when a single 6.5\" is not enough but a larger driver format is not an option.\u003c\/p\u003e\n \u003cp\u003eEvery panel is CNC-cut from \u003cstrong\u003eLangboard Elite MDF\u003c\/strong\u003e to exact internal volume and assembled by hand in our Tennessee facility. The \u003cstrong\u003e1.5\" double baffle\u003c\/strong\u003e handles the mechanical demands of two drivers sharing a single front panel without flexing. A single terminal cup handles wiring for both drivers internally. Both drivers must be run at the same impedance. Shipping is included.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003c!-- Why Ported --\u003e\n \u003cdiv class=\"px-section\"\u003e\n \u003ch2\u003eWhy Dual 6.5\" Ported at 40Hz\u003c\/h2\u003e\n \u003cp\u003eTwo 6.5\" drivers in a ported alignment at 40Hz is not an arbitrary configuration. It is the result of matching driver size, available enclosure volume, and tuning frequency to produce the most output from the smallest possible footprint. Each driver bay is \u003cstrong\u003e0.30 ft³\u003c\/strong\u003e, well within the recommended ported range for most 6.5\" subwoofers, and the shared port is tuned to \u003cstrong\u003e40Hz\u003c\/strong\u003e, a point that balances deep extension with controlled port velocity on a compact driver.\u003c\/p\u003e\n \u003cp\u003eThe 40Hz tuning point on the P6D-P sits slightly higher than the P6-P's 38Hz, which is appropriate for a dual driver configuration, the combined cone area and air mass benefit from a slightly higher tuning point that keeps port velocity in check at the output levels two drivers can achieve. The result is extended, efficient bass that works in compact spaces without the port noise that comes from pushing a small port too hard.\u003c\/p\u003e\n \u003cdiv class=\"px-grid\"\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eDouble the Cone Area\u003c\/h4\u003e\n \u003cp\u003eTwo 6.5\" drivers moving in the same enclosure produce combined cone area that approaches a single 10\" driver. The P6D-P generates output that a single 6.5\" enclosure, sealed or ported, cannot match regardless of tuning.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eWider Bass Dispersion\u003c\/h4\u003e\n \u003cp\u003eTwo drivers spaced across a 24\" baffle produce a wider, more even bass presentation across the vehicle cabin than a single point source. The low-frequency field is more uniform from driver seat to passenger seat.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003e40Hz Tuning: Controlled and Extended\u003c\/h4\u003e\n \u003cp\u003e40Hz provides strong output through the upper sub-bass range while keeping port velocity manageable for a compact dual-driver enclosure. Deep enough to be felt, controlled enough to stay clean at volume.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eCompact Footprint, Serious Output\u003c\/h4\u003e\n \u003cp\u003eAt 24\" wide and 8\" tall, the P6D-P delivers dual-driver output from a footprint that fits in spaces a single 10\" or 12\" ported enclosure would never clear.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- Construction --\u003e\n \u003cdiv class=\"px-section\"\u003e\n \u003ch2\u003eConstruction: Built to Handle Two Drivers\u003c\/h2\u003e\n \u003cp\u003eA dual-driver enclosure places more mechanical demand on the front panel than a single-driver build. Two motors, two cutouts, two mounting flanges. All on the same baffle. The P6D-P addresses this with a \u003cstrong\u003e1.5\" double baffle\u003c\/strong\u003e and the same Langboard Elite MDF construction that runs across the entire Proline X Performance Series.\u003c\/p\u003e\n\n \u003ch3\u003eLangboard Elite MDF, Named, Verified, Documented\u003c\/h3\u003e\n \u003cp\u003eEvery panel is cut from \u003cstrong\u003eLangboard Elite MDF: 3\/4\" (18mm)\u003c\/strong\u003e, a named, mill-documented panel stock produced in the United States. The numbers below are pulled from Langboard's published mill data, not marketing language.\u003c\/p\u003e\n\n \u003cdiv class=\"px-highlight\"\u003e\n \u003ch3\u003eLangboard Elite: Published Mill Data\u003c\/h3\u003e\n \u003cp\u003e\u003cstrong\u003eDensity:\u003c\/strong\u003e 48.5 lbs\/ft³, higher density means less porosity, better screw retention, and reduced resonance\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eInternal Bond:\u003c\/strong\u003e 200 psi, resistance to delamination under sustained bass pressure cycling\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eModulus of Elasticity:\u003c\/strong\u003e 410,000 psi, panel stiffness under load; less flex means less resonance\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eFace Screw Holding:\u003c\/strong\u003e 325 lbs, baffle hardware stays locked under vibration\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eEdge Screw Holding:\u003c\/strong\u003e 250 lbs, joint integrity at every panel edge connection\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003ch3\u003e1.5\" Double Baffle\u003c\/h3\u003e\n \u003cp\u003eThe front panel on the P6D-P is a \u003cstrong\u003e1.5\" double baffle\u003c\/strong\u003e: two layers of 3\/4\" Langboard Elite MDF laminated together. Two drivers mounted side by side on a single baffle create a combined mechanical load that a standard 0.75\" panel is not designed to handle long-term. The double baffle eliminates flex, eliminates resonance at the front panel, and holds both driver mounting flanges with the screw retention of a 1.5\" solid panel rather than two thin panels trying to act as one.\u003c\/p\u003e\n\n \u003ch3\u003eV-Groove and Dado Joinery\u003c\/h3\u003e\n \u003cp\u003eEvery panel joint uses \u003cstrong\u003eV-groove and dado joinery\u003c\/strong\u003e, CNC-cut interlocking grooves that mechanically lock panels before adhesive is applied. The dado creates a tongue-and-groove mechanical interlock that resists shear forces regardless of glue strength. Every corner is locked. Every seam is airtight.\u003c\/p\u003e\n\n \u003ch3\u003eSingle Terminal Cup: Shared Internal Wiring\u003c\/h3\u003e\n \u003cp\u003eThe P6D-P uses a single \u003cstrong\u003eABS\/Carbon Fiber Composite recessed terminal cup\u003c\/strong\u003e built in-house at our Tennessee facility. Both drivers are wired internally to the cup. Both drivers must be run at the same impedance. Confirm your amplifier output and driver impedances match before wiring. The recessed mount protects terminals from cargo contact. Stainless steel hardware, aluminum landing plates, and copper ring terminals are pre-wired with \u003cstrong\u003e12g OFC speaker wire\u003c\/strong\u003e.\u003c\/p\u003e\n\n \u003cdiv class=\"px-grid\"\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eShopSabre CNC Routers\u003c\/h4\u003e\n \u003cp\u003eEvery panel is machine-cut on ShopSabre industrial CNC routers. Consistent geometry, no hand-cut variance, no gaps at the joints. Both driver cutouts are machined to identical diameter and position.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eHand-Assembled in Tennessee\u003c\/h4\u003e\n \u003cp\u003eEvery enclosure is hand-assembled at our Tennessee facility and inspected before it ships. No overseas manufacturing. No batch assembly shortcuts.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eDark Gray Trunkliner or Plush Black\u003c\/h4\u003e\n \u003cp\u003eBoth finish options are professionally applied. Dark Gray Trunkliner provides a stealth OEM appearance. Plush Black delivers the traditional aftermarket look. Both are durably bonded for long-term wear.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eShipping Included\u003c\/h4\u003e\n \u003cp\u003eNo freight charges at checkout. The price you see is the price you pay. The enclosure ships assembled and ready to install.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- Fitment --\u003e\n \u003cdiv class=\"px-section\"\u003e\n \u003ch2\u003eFitment Guide\u003c\/h2\u003e\n \u003cp\u003eThe P6D-P spans \u003cstrong\u003e24\" wide\u003c\/strong\u003e: sized to fit across most rear floors and behind most rear seats in compact and mid-size vehicles. At \u003cstrong\u003e8\" tall and 12\" deep\u003c\/strong\u003e, it clears most behind-seat depth constraints that would eliminate a larger enclosure from consideration.\u003c\/p\u003e\n\n \u003ch3\u003eDimensional Specifications\u003c\/h3\u003e\n \u003cdiv class=\"px-highlight\"\u003e\n \u003cp\u003e\u003cstrong\u003eExternal Dimensions:\u003c\/strong\u003e 24\" W x 8\" H x 12\" D\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eNet Internal Volume:\u003c\/strong\u003e 0.60 ft³ (0.30 ft³ per driver)\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eTuning Frequency:\u003c\/strong\u003e 40Hz\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eSubwoofer Cutout:\u003c\/strong\u003e 5.97\"\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eMax Mounting Depth:\u003c\/strong\u003e 7.75\"\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eFront Panel Thickness:\u003c\/strong\u003e 1.5\" Double Baffle\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003ch3\u003eDriver Compatibility\u003c\/h3\u003e\n \u003cp\u003eThe P6D-P accommodates any 6.5\" subwoofer with a cutout diameter at or below \u003cstrong\u003e5.97\"\u003c\/strong\u003e and a mounting depth at or below \u003cstrong\u003e7.75\"\u003c\/strong\u003e. Both drivers must be the same model and impedance. Verify published specifications before ordering.\u003c\/p\u003e\n\n \u003ch3\u003eCompatible Driver\u003c\/h3\u003e\n \u003cp\u003eThe following driver is available from Audio Intensity and has been verified for fitment in the P6D-P:\u003c\/p\u003e\n \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/triton-sx6d4-6-5-dual-4-ohm-subwoofer\"\u003eTriton SX6D4, 6.5\" Dual 4-Ohm Subwoofer \u003c\/a\u003e\n \u003cp style=\"font-size:0.9em; color:#64748b; margin-top:12px;\"\u003eNote: The Proline X 6\" subwoofer will be available shortly and will replace this recommendation once live.\u003c\/p\u003e\n\n \u003ch3\u003eIdeal Install Applications\u003c\/h3\u003e\n \u003cdiv class=\"px-grid\"\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eBehind Rear Seat\u003c\/h4\u003e\n \u003cp\u003eAt 8\" tall and 12\" deep, the P6D-P fits behind the rear seat of most compact and mid-size sedans without requiring seat modification. The 24\" width spans most rear floor openings cleanly.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eCompact Trunk Floor\u003c\/h4\u003e\n \u003cp\u003eThe low profile makes the P6D-P viable as a flat trunk floor installation in vehicles where available depth is limited but width is not. Measure available trunk depth before ordering.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eRear Deck Builds\u003c\/h4\u003e\n \u003cp\u003eThe 8\" height and dual-driver spread make the P6D-P a strong candidate for rear deck installations in sedans where the deck depth accommodates the 7.75\" max mounting depth.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eStealth Daily Installs\u003c\/h4\u003e\n \u003cp\u003eDark Gray Trunkliner and a low-profile form factor make the P6D-P blend into most vehicle interiors. Two drivers produce output that does not match the visual footprint of the enclosure.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- CTA --\u003e\n \u003cdiv class=\"px-cta\"\u003e\n \u003ch2\u003eDual Driver Output. Compact Footprint. Tennessee-Built.\u003c\/h2\u003e\n \u003cp\u003eThe Proline X P6D-P delivers dual 6.5\" ported output from an enclosure that fits where larger boxes cannot. Langboard Elite MDF. V-groove and dado joinery. 1.5\" double baffle. In-house terminal cup. Hand-assembled in Tennessee and inspected before it ships.\u003c\/p\u003e\n \u003cp\u003eTwo drivers. One enclosure. Real bass where it was not possible before. \u003cstrong\u003e$179.99 Dark Gray Trunkliner. $189.99 Plush Black.\u003c\/strong\u003e Shipping included.\u003c\/p\u003e\n \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Dark Gray Trunkliner","offer_id":43143832764505,"sku":"P6D-P G","price":179.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black","offer_id":43143832797273,"sku":"P6D-P B","price":189.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/proline-x-dual-65-ported-subwoofer-enclosure-precision-sound-performancesubwoofer-enclosuresproline-x-485117.jpg?v=1761970153"},{"product_id":"proline-x-professional-series-enclosure-for-dual-kicker-solo-x-15","title":"Kicker Solo-Baric L7X 15 Dual Box: Ported 15\" Professional Series Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 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0}.df-graph-title{font-size:.78em;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:#a8a29e;margin:0 0 10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Enclosure | X Series | Fits Kicker Solo X 15\" Subwoofer | Dual\u003c\/h2\u003e\n  \u003cp\u003eAudio Intensity and Proline X are not affiliated with Kicker. This enclosure is built to the published parameters of the Kicker Solo-Baric L7X.\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e10.00 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 30.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTriple 2.25\" baffle\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Kicker Solo-Baric L7X 15\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-note\"\u003e\u003cp\u003e\u003cstrong\u003eFreight shipping to the lower 48 states is included in the price. Woofers are not included.\u003c\/strong\u003e\u003c\/p\u003e\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 30.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eTwo Solo-Baric L7X 15 drivers share this cabinet's airspace: 10.00 cubic feet net total, vented at 30.0 Hz through a 140.0 square inch slot. The per-driver conditions match the single-fifteen box; only the total airspace and port area double, in the largest cabinet the L7X line calls for.\u003c\/p\u003e\n  \u003cp\u003eF3 lands at 25.0 Hz on this pair, and passband ripple holds at 2.45 dB, the flattest result across the whole Kicker range. The port stays under the chuff threshold up to 1145 W combined, above which the mouth velocity crosses Kicker's own reference. Set the subsonic filter at 24 Hz and leave it there below tuning.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe cabinet\u003c\/h3\u003e\n  \u003cp\u003e46.50\" W x 19.50\" H x 35.00\" D external, internally braced. At this size it ships freight, and freight shipping to the lower 48 states is included in the price.\u003c\/p\u003e\n  \u003cp\u003eThis is our dual-fifteen envelope, sized for two L7X 15 drivers on one shared chamber; at this footprint it is the largest box in the Kicker line. The baffle cutouts are machined to the L7X's square frame, which is not cross-compatible with round-frame drivers of the same nominal size. The woofers are not included: bring your own pair of L7X 15. We handle the box.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe numbers to respect\u003c\/h3\u003e\n  \u003cp\u003eKicker's own Klippel rig measured the L7X 15 under SKU 49L7X152, the same parameters carried into both drivers in this dual cabinet; the Dual 2 Ohm coil is the one they publish, and the cabinet fits either the D1 or D2 version of the driver. Kicker publishes no outer frame dimension for the L7X, so the frame OD used here, 15.25 inches, is estimated from the published cutout. This cabinet's shipping weight is estimated from its shell rather than measured on the dock, and at this size the box ships freight rather than parcel. Audio Intensity and Proline X are not affiliated with Kicker.\u003c\/p\u003e\n  \u003cp\u003eThis cabinet is 10.00 cubic feet net, with a slot port of 140.0 square inches tuned to 30.0 Hz; the port stays under the chuff threshold up to 1145 W; above that the air at the mouth moves faster than the 17 metres per second where a slot starts to chuff.\u003c\/p\u003e\n  \u003cp\u003eSet a 24 Hz subsonic filter, 24 dB per octave. Below tuning the vent stops loading the cone; with the filter in place the cone reaches 15.1 mm of its 31.2 mm at 3000 W.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":41100851740761,"sku":"Pro15D-P KIK","price":1699.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/proline-x-professional-series-loaded-subwoofer-box-dual-kicker-solox-15-inchenclosed-subwooferproline-x-407321.webp?v=1761970505"},{"product_id":"proline-x-p10-p-single-10-ported-subwoofer-enclosure-v3","title":"Proline X P10-P | Single 10\" Ported Subwoofer Enclosure | V3","description":"\u003cstyle\u003e\n .px-desc {\n font-family: 'Helvetica Neue', Arial, sans-serif;\n line-height: 1.8;\n color: #1e293b;\n max-width: 1200px;\n margin: 0 auto;\n background: #ffffff;\n }\n\n .px-hero {\n background: linear-gradient(135deg, #0f172a 0%, #0e7490 100%);\n padding: 60px 40px;\n text-align: center;\n color: white;\n }\n\n .px-hero .px-title {\n font-size: 2.6em;\n font-weight: 800;\n text-transform: uppercase;\n letter-spacing: 2px;\n margin: 0 0 10px 0;\n color: white;\n }\n\n .px-hero .px-subtitle {\n font-size: 1.2em;\n font-weight: 300;\n opacity: 0.9;\n margin: 0 0 30px 0;\n }\n\n .px-badges {\n display: flex;\n justify-content: center;\n flex-wrap: wrap;\n gap: 12px;\n margin-top: 20px;\n }\n\n .px-badge {\n background: rgba(6, 182, 212, 0.2);\n border: 1px solid #06b6d4;\n color: #67e8f9;\n padding: 8px 20px;\n border-radius: 20px;\n font-size: 0.9em;\n font-weight: 600;\n letter-spacing: 0.5px;\n }\n\n .px-section {\n padding: 50px 40px;\n border-bottom: 1px solid #e2e8f0;\n background: #ffffff;\n }\n\n .px-section:nth-child(even) {\n background: #f0f9ff;\n }\n\n .px-section h2 {\n color: #0e7490;\n font-size: 2em;\n font-weight: 700;\n margin: 0 0 20px 0;\n padding-bottom: 12px;\n border-bottom: 3px solid #06b6d4;\n }\n\n .px-section h3 {\n color: #0f172a;\n font-size: 1.4em;\n font-weight: 600;\n margin: 30px 0 15px 0;\n }\n\n .px-section p {\n font-size: 1.05em;\n color: #334155;\n margin-bottom: 18px;\n }\n\n .px-section ul {\n margin: 15px 0;\n padding-left: 25px;\n }\n\n .px-section li {\n font-size: 1.05em;\n color: #334155;\n margin-bottom: 10px;\n line-height: 1.7;\n }\n\n .px-grid {\n display: grid;\n grid-template-columns: repeat(2, 1fr);\n gap: 24px;\n margin: 30px 0;\n }\n\n .px-card {\n background: #ffffff;\n border: 1px solid #e2e8f0;\n border-top: 4px solid #06b6d4;\n border-radius: 6px;\n padding: 24px;\n }\n\n .px-card h4 {\n color: #0e7490;\n font-size: 1.15em;\n font-weight: 700;\n margin: 0 0 12px 0;\n }\n\n .px-card p {\n font-size: 1em;\n color: #475569;\n margin: 0;\n line-height: 1.7;\n }\n\n .px-highlight {\n background: #f0f9ff;\n border-left: 5px solid #06b6d4;\n padding: 24px 28px;\n margin: 28px 0;\n border-radius: 0 6px 6px 0;\n }\n\n .px-highlight h3 {\n color: #0e7490;\n margin: 0 0 12px 0;\n font-size: 1.2em;\n }\n\n .px-highlight p {\n margin-bottom: 10px;\n color: #1e293b;\n }\n\n .px-cta {\n background: linear-gradient(135deg, #0f172a 0%, #0e7490 100%);\n padding: 60px 40px;\n text-align: center;\n color: white;\n }\n\n .px-cta h2 {\n font-size: 2.2em;\n font-weight: 700;\n margin: 0 0 20px 0;\n color: white;\n border: none;\n padding: 0;\n }\n\n .px-cta p {\n font-size: 1.15em;\n opacity: 0.92;\n max-width: 800px;\n margin: 0 auto 20px auto;\n color: white;\n }\n\n .px-driver-link {\n display: inline-block;\n background: #f0f9ff;\n border: 2px solid #06b6d4;\n border-radius: 6px;\n padding: 16px 24px;\n margin: 10px 10px 10px 0;\n text-decoration: none;\n color: #0e7490;\n font-weight: 700;\n font-size: 1em;\n transition: all 0.2s ease;\n }\n\n .px-driver-link:hover {\n background: #06b6d4;\n color: white;\n }\n\n @media (max-width: 768px) {\n .px-hero { padding: 40px 20px; }\n .px-hero .px-title { font-size: 1.8em; }\n .px-section { padding: 30px 20px; }\n .px-section h2 { font-size: 1.6em; }\n .px-grid { grid-template-columns: 1fr; }\n .px-cta { padding: 40px 20px; }\n .px-cta h2 { font-size: 1.6em; }\n }\n\u003c\/style\u003e\n\n\u003cdiv class=\"px-desc\"\u003e\n\n \u003c!-- Hero --\u003e\n \u003cdiv class=\"px-hero\"\u003e\n \u003cp class=\"px-title\"\u003eProline X P10-P\u003c\/p\u003e\n \u003cp class=\"px-subtitle\"\u003eSingle 10\" Ported Subwoofer Enclosure | V3\u003c\/p\u003e\n \u003cdiv class=\"px-badges\"\u003e\n \u003cspan class=\"px-badge\"\u003e1.25 ft³ Net\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003e36Hz Tuning\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003ePorted Bass Reflex\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003e7.75\" Max Depth\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- Introduction --\u003e\n \u003cdiv class=\"px-section\"\u003e\n \u003ch2\u003eMaximum Output From a Single 10\". Properly Tuned.\u003c\/h2\u003e\n \u003cp\u003eThe \u003cstrong\u003eProline X P10-P\u003c\/strong\u003e is a single 10\" slot-ported enclosure built for installs that need the most output a single 10\" driver can produce. At \u003cstrong\u003e1.25 ft³ net\u003c\/strong\u003e and tuned to \u003cstrong\u003e36Hz\u003c\/strong\u003e, this enclosure gives a 10\" driver the air space and port geometry to operate at its efficiency peak, strong output through the upper bass range, usable extension into the low 30s, and a response curve that performs across music genres without being tuned for just one application.\u003c\/p\u003e\n \u003cp\u003eAt \u003cstrong\u003e19\" wide, 12\" tall, and 16.25\" deep\u003c\/strong\u003e, the P10-P is a dedicated trunk build. The 16.25\" depth is the critical dimension. This enclosure requires a trunk installation. It is not a behind-seat option. The \u003cstrong\u003e7.75\" max mounting depth\u003c\/strong\u003e covers most standard 10\" drivers. Port geometry is CNC-cut to exact dimensions. Tuning is consistent unit to unit with no hand-cut variance in port length or cross-section.\u003c\/p\u003e\n \u003cp\u003eEvery panel is CNC-cut from \u003cstrong\u003eLangboard Elite MDF\u003c\/strong\u003e to exact internal volume and assembled by hand in our Tennessee facility. A single recessed \u003cstrong\u003eABS\/Carbon Fiber Composite terminal cup\u003c\/strong\u003e handles wiring, pre-wired with \u003cstrong\u003e12g OFC speaker wire\u003c\/strong\u003e. Finish options are Dark Gray Trunkliner or Plush Black. Shipping is included.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003c!-- Why Ported --\u003e\n \u003cdiv class=\"px-section\"\u003e\n \u003ch2\u003eWhy Ported at 36Hz for a Single 10\"\u003c\/h2\u003e\n \u003cp\u003eA sealed 10\" at 0.70 ft³ produces accurate, controlled bass with a flat response. The P10-P trades some of that precision for significantly more output and lower frequency extension, the correct tradeoff when the install goal is impact and room-pressurizing bass rather than strict accuracy. The ported alignment at \u003cstrong\u003e36Hz\u003c\/strong\u003e pushes the efficiency peak into the upper sub-bass range where the majority of bass content in music lives, and where a single 10\" in sealed alignment cannot compete on output.\u003c\/p\u003e\n \u003cp\u003eAt 1.25 ft³, the P10-P gives the driver enough room to breathe in a ported alignment without the box becoming too large for a standard trunk install. Port velocity stays controlled at this volume, no chuffing, no audible port noise at real-world listening levels. The driver is operating in its correctly-sized ported range and the port is sized to match.\u003c\/p\u003e\n \u003cdiv class=\"px-grid\"\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eExtended Low-Frequency Output\u003c\/h4\u003e\n \u003cp\u003ePorted alignment at 36Hz extends usable bass output significantly lower than the sealed P10-S. The P10-P produces audible, impactful output well below 40Hz. Output levels the sealed version cannot approach at the same amplifier power level.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eHigher Efficiency Per Watt\u003c\/h4\u003e\n \u003cp\u003ePorted enclosures convert amplifier power to acoustic output more efficiently than sealed designs near the tuning frequency. More output from the same amplifier, a meaningful advantage when running modest power levels from a compact monoblock.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eReduced Driver Excursion at Tuning\u003c\/h4\u003e\n \u003cp\u003eAt and near 36Hz, the port handles the acoustic load and driver excursion drops significantly. Less mechanical stress on the driver at the frequencies where 10\" drivers are most vulnerable to over-excursion at high power levels.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003e36Hz: Balanced and General-Purpose\u003c\/h4\u003e\n \u003cp\u003e36Hz provides strong output through the upper sub-bass without port velocity issues on a properly sized 10\" enclosure. A genre-agnostic tuning point that performs across hip-hop, rock, and electronic equally without being optimized for any single use case.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- Construction --\u003e\n \u003cdiv class=\"px-section\"\u003e\n \u003ch2\u003eConstruction: CNC-Cut Port Geometry, Consistent Tuning Every Unit\u003c\/h2\u003e\n \u003cp\u003eThe P10-P uses the same Langboard Elite MDF and V-groove and dado joinery construction as every enclosure in the Proline X Performance Series. The port geometry, length, cross-section, and position, is CNC-cut to exact dimensions on the same ShopSabre routers that cut every panel. Tuning frequency does not vary between units.\u003c\/p\u003e\n\n \u003ch3\u003eLangboard Elite MDF, Named, Verified, Documented\u003c\/h3\u003e\n \u003cp\u003eEvery panel is cut from \u003cstrong\u003eLangboard Elite MDF: 3\/4\" (18mm)\u003c\/strong\u003e, a named, mill-documented panel stock produced in the United States. The specifications below are pulled directly from Langboard's published mill data.\u003c\/p\u003e\n\n \u003cdiv class=\"px-highlight\"\u003e\n \u003ch3\u003eLangboard Elite: Published Mill Data\u003c\/h3\u003e\n \u003cp\u003e\u003cstrong\u003eDensity:\u003c\/strong\u003e 48.5 lbs\/ft³, higher density means less porosity, better screw retention, and reduced resonance\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eInternal Bond:\u003c\/strong\u003e 200 psi, resistance to delamination under sustained bass pressure cycling\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eModulus of Elasticity:\u003c\/strong\u003e 410,000 psi, panel stiffness under load; less flex means less resonance\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eFace Screw Holding:\u003c\/strong\u003e 325 lbs, baffle hardware stays locked under vibration\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eEdge Screw Holding:\u003c\/strong\u003e 250 lbs, joint integrity at every panel edge connection\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003ch3\u003eV-Groove and Dado Joinery\u003c\/h3\u003e\n \u003cp\u003eEvery panel joint uses \u003cstrong\u003eV-groove and dado joinery\u003c\/strong\u003e, CNC-cut interlocking grooves that mechanically lock panels before adhesive is applied. Port panels are joined with the same interlocking geometry as the enclosure walls, airtight, consistent, and resistant to shear forces at the joint level. Every seam is mechanically locked before adhesive is applied.\u003c\/p\u003e\n\n \u003ch3\u003eIn-House ABS\/Carbon Fiber Composite Terminal Cup\u003c\/h3\u003e\n \u003cp\u003eThe terminal cup is built in-house at our Tennessee facility. The \u003cstrong\u003eABS\/Carbon Fiber Composite recessed cup\u003c\/strong\u003e features stainless steel hardware, aluminum landing plates, and copper ring terminals, pre-wired with \u003cstrong\u003e12g OFC speaker wire\u003c\/strong\u003e. The recessed mount protects terminals from cargo contact. Copper ring terminals provide a clean, corrosion-resistant connection that does not loosen under vibration.\u003c\/p\u003e\n\n \u003cdiv class=\"px-grid\"\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eCNC-Cut Port Geometry\u003c\/h4\u003e\n \u003cp\u003ePort length, cross-section, and position are machine-cut to exact dimensions. Tuning frequency is consistent unit to unit. No hand-cut variance in port dimensions means the P10-P performs identically across every unit produced.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eHand-Assembled in Tennessee\u003c\/h4\u003e\n \u003cp\u003eEvery enclosure is hand-assembled at our Tennessee facility and inspected before it ships. No overseas manufacturing. No batch assembly shortcuts.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eDark Gray Trunkliner or Plush Black\u003c\/h4\u003e\n \u003cp\u003eBoth finish options are professionally applied. Dark Gray Trunkliner blends with factory trunk materials. Plush Black delivers the traditional aftermarket look. Both are durably bonded for long-term wear.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eShipping Included\u003c\/h4\u003e\n \u003cp\u003eNo freight charges at checkout. The price you see is the price you pay. The enclosure ships assembled and ready to install.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- Fitment --\u003e\n \u003cdiv class=\"px-section\"\u003e\n \u003ch2\u003eFitment Guide\u003c\/h2\u003e\n \u003cp\u003eThe P10-P is a dedicated trunk build. At \u003cstrong\u003e19\"W x 12\"H x 16.25\"D\u003c\/strong\u003e, the 16.25\" depth makes this a trunk floor enclosure, not a behind-seat option. Measure your available trunk depth before ordering.\u003c\/p\u003e\n\n \u003ch3\u003eDimensional Specifications\u003c\/h3\u003e\n \u003cdiv class=\"px-highlight\"\u003e\n \u003cp\u003e\u003cstrong\u003eExternal Dimensions:\u003c\/strong\u003e 19\" W x 12\" H x 16.25\" D\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eNet Internal Volume:\u003c\/strong\u003e 1.25 ft³\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eTuning Frequency:\u003c\/strong\u003e 36Hz\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eSubwoofer Cutout:\u003c\/strong\u003e 9.25\"\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eMax Mounting Depth:\u003c\/strong\u003e 7.75\"\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eFront Panel Thickness:\u003c\/strong\u003e 0.75\" Single Baffle\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003ch3\u003eDriver Compatibility\u003c\/h3\u003e\n \u003cp\u003eThe P10-P accommodates any 10\" subwoofer with a cutout diameter at or below \u003cstrong\u003e9.25\"\u003c\/strong\u003e and a mounting depth at or below \u003cstrong\u003e7.75\"\u003c\/strong\u003e. Verify both dimensions against your driver's published specifications before ordering.\u003c\/p\u003e\n\n \u003ch3\u003eCompatible Drivers\u003c\/h3\u003e\n \u003cp\u003eThe following drivers are available from Audio Intensity and are compatible with the P10-P:\u003c\/p\u003e\n \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/prodigy-audio-10-inch-subwoofer-nb2-series\"\u003eProdigy NB2-10D4 \u003c\/a\u003e\n \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/image-dynamics-id10-v4-10-inch-subwoofer\"\u003eImage Dynamics ID10 V4 \u003c\/a\u003e\n \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/prodigy-audio-10-inch-subwoofer-nb3-series\"\u003eProdigy NB3-10D4 \u003c\/a\u003e\n \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/audiomobile-gt2-2010-10-subwoofer-single\"\u003eAudiomobile GT2 2010 \u003c\/a\u003e\n \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/prodigy-audio-1000-watt-10-inch-subwoofer-nb5-series\"\u003eProdigy NB5-10D4 \u003c\/a\u003e\n \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/crescendo-revolution-710-10-inch-subwoofer\"\u003eCrescendo Revolution 710 \u003c\/a\u003e\n \u003cp style=\"font-size:0.9em; color:#64748b; margin-top:12px;\"\u003eAlways verify cutout diameter and mounting depth against your specific driver's published specifications before ordering.\u003c\/p\u003e\n\n \u003ch3\u003eIdeal Install Applications\u003c\/h3\u003e\n \u003cdiv class=\"px-grid\"\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eDedicated Trunk Build\u003c\/h4\u003e\n \u003cp\u003eAt 19\" wide and 16.25\" deep, the P10-P is a trunk floor enclosure. The 16.25\" depth requires dedicated trunk placement. Measure your available depth before ordering.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eMaximum Single 10\" Output\u003c\/h4\u003e\n \u003cp\u003eFor installs where the P10-S sealed is not enough output, the P10-P is the direct step up. Same driver compatibility, significantly more output and lower frequency extension from the ported alignment.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eDaily Driver High-Output Systems\u003c\/h4\u003e\n \u003cp\u003eThe 36Hz tuning and 1.25 ft³ volume produce a bass response that works across music genres without requiring system-specific tuning. A strong general-purpose single 10\" ported build for daily high-output use.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eStep Up From 8\" Builds\u003c\/h4\u003e\n \u003cp\u003eFor installs currently running a single 8\" ported that need more output and lower extension, the P10-P is the natural progression. More cone area, more volume, more output from a similarly sized trunk footprint.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- CTA --\u003e\n \u003cdiv class=\"px-cta\"\u003e\n \u003ch2\u003eMaximum 10\" Output. Tennessee-Built. Shipping Included.\u003c\/h2\u003e\n \u003cp\u003eThe Proline X P10-P is a single 10\" ported enclosure built to a spec, not a price point. Langboard Elite MDF. V-groove and dado joinery. CNC-cut port geometry. In-house terminal cup. Hand-assembled in Tennessee and inspected before it ships.\u003c\/p\u003e\n \u003cp\u003eIf you need the most output a single 10\" driver can produce from a standard trunk footprint, this is the correct enclosure. \u003cstrong\u003e$199.99 Dark Gray Trunkliner. $209.99 Plush Black.\u003c\/strong\u003e Shipping included.\u003c\/p\u003e\n \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Dark Gray Trunkliner","offer_id":43157559607385,"sku":"P10-P G","price":199.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black","offer_id":43157559640153,"sku":"P10-P B","price":209.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/proline-x-ported-sub-box-for-10-inch-subwooferssubwoofer-enclosuresproline-x-678851.jpg?v=1761970208"},{"product_id":"6-5-inch-subwoofer-box-professional","title":"Professional Series Ported 6.5\" Universal 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class=\"df-hero\"\u003e\n  \u003ch2\u003eProfessional Series Ported 6.5\" Universal Enclosure\u003c\/h2\u003e\n  \u003cp\u003eThis is a universal enclosure: it is cut to a standard 6.5 inch cutout rather than to one driver, so it fits any subwoofer whose\n  published parameters suit the airspace below.\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e0.75 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eUniversal cutout\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhat this cabinet is\u003c\/h3\u003e\n  \u003cp\u003e0.75 cubic feet net with a slot port of 12.0 square inches tuned to 35.0 Hz. There is no driver-specific claim on this page: bring the subwoofer you want to run\n  and check its published parameters against the airspace and tuning above before you buy.\u003c\/p\u003e\n  \u003cp\u003eThis cabinet is cut to a standard cutout rather than one driver, so there is no single alignment to model; the volume and tuning are stated for the buyer to check against their driver's published parameters.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe cabinet\u003c\/h3\u003e\n  \u003cp\u003e23.50\" W x 8.25\" H x 15.38\" D external. It ships as a UPS parcel; the price includes shipping in the 48 states.\u003c\/p\u003e\n  \u003cp\u003eThere is no driver pinned to this cabinet and no driver-specific claim is made here: check whatever six and a half inch driver you are installing against its own published ported recommendation before assuming this box is the right size for it. The 0.75 cubic feet and 35.0 Hz tuning are the store's own build figures.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":41866223419481,"sku":"Pro6-P XL","price":275.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/professional-series-65-inch-subwoofer-box-proline-xsubwoofer-enclosuresproline-x-723923.jpg?v=1761970226"},{"product_id":"professional-series-dual-6-5-inch-subwoofer-box","title":"Professional Series Ported Dual 6.5\" Universal Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:54px 36px;text-align:center;color:#fff}.df-hero 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10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProfessional Series Ported Dual 6.5\" Universal Enclosure\u003c\/h2\u003e\n  \u003cp\u003eThis is a universal enclosure: it is cut to a standard 6.5 inch cutout rather than to one driver, so it fits any subwoofer whose\n  published parameters suit the airspace below.\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.50 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eUniversal cutout\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhat this cabinet is\u003c\/h3\u003e\n  \u003cp\u003e1.50 cubic feet net with a slot port of 23.5 square inches tuned to 35.0 Hz. There is no driver-specific claim on this page: bring the subwoofer you want to run\n  and check its published parameters against the airspace and tuning above before you buy.\u003c\/p\u003e\n  \u003cp\u003eThis cabinet is cut to a standard cutout rather than one driver, so there is no single alignment to model; the volume and tuning are stated for the buyer to check against their driver's published parameters.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe cabinet\u003c\/h3\u003e\n  \u003cp\u003e29.50\" W x 10.00\" H x 17.38\" D external. It ships as a UPS parcel; the price includes shipping in the 48 states.\u003c\/p\u003e\n  \u003cp\u003eThere is no driver pinned to this cabinet and no driver-specific claim is made here: check whatever six and a half inch drivers you are installing against their own published ported recommendation. The port_opening metafield on this listing reads 23.5 inches, which may actually be a length rather than an area; it is carried here as 23.5 square inches pending confirmation from Scott, and is the figure used above.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":41916426158169,"sku":"Pro6D-P XL","price":350.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/professional-series-dual-65-inch-subwoofer-box-proline-xsubwoofer-enclosuresproline-x-742959.jpg?v=1761970238"},{"product_id":"kicker-solo-x-10-subwoofer-box-professional-series-enclosure-for-compact-high-performance-bass","title":"Kicker Solo-Baric L7X 10 Box: Ported 10\" Professional Series Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap 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0}.df-graph-title{font-size:.78em;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:#a8a29e;margin:0 0 10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Enclosure | X Series | Fits Kicker Solo X 10\" Subwoofer\u003c\/h2\u003e\n  \u003cp\u003eAudio Intensity and Proline X are not affiliated with Kicker. This enclosure is built to the published parameters of the Kicker Solo-Baric L7X.\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e2.01 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 30.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003e2.25\" three-layer baffle\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Kicker Solo-Baric L7X 10\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 30.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe Solo-Baric L7X 10 carries a deeper motor and a bigger frame than the eight, and this cabinet gives it 2.01 cubic feet net, vented at 30.0 Hz through a 47.1 square inch slot that wraps along the back wall and forward down the far side. It is the mid-size box in the professional Kicker line, sized for one driver.\u003c\/p\u003e\n  \u003cp\u003eF3 lands at 25.6 Hz on this airspace, and passband ripple holds at 4.09 dB, inside the ceiling we hold new designs to. The port stays under the chuff threshold up to 2400 W, above which the mouth velocity crosses Kicker's own reference; that is well past the power most trunk boxes this size ever see. Set the subsonic filter at 24 Hz and leave it there below tuning.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe cabinet\u003c\/h3\u003e\n  \u003cp\u003e32.00\" W x 16.00\" H x 18.50\" D external, internally braced. It ships as a UPS parcel; the price includes shipping in the 48 states.\u003c\/p\u003e\n  \u003cp\u003eIt is 32 by 16 inches on the face, larger than our standard single-ten envelope, because holding Kicker's airspace with a quiet port takes the room; it is sized for one L7X 10 only. The baffle cutout is machined to the L7X's square frame, which is not cross-compatible with round-frame drivers of the same nominal size. You source the driver. We handle the box.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe numbers to respect\u003c\/h3\u003e\n  \u003cp\u003eKicker's own Klippel rig measured the L7X 10 under SKU 49L7X102, and the Dual 2 Ohm coil is the one they publish; the cabinet fits either the D1 or D2 version of this driver. Kicker publishes no outer frame dimension for the L7X, so the frame OD used here, 10.8125 inches, is estimated from the published cutout. This cabinet's shipping weight is estimated from its shell rather than measured on the dock. Audio Intensity and Proline X are not affiliated with Kicker.\u003c\/p\u003e\n  \u003cp\u003eThis cabinet is 2.01 cubic feet net, with a slot port of 47.1 square inches tuned to 30.0 Hz; the port stays under the chuff threshold at 2400 W, the design power basis.\u003c\/p\u003e\n  \u003cp\u003eSet a 24 Hz subsonic filter, 24 dB per octave. Below tuning the vent stops loading the cone; with the filter in place the cone reaches 14.8 mm of its 31.2 mm at 2400 W.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"None - Carpet Only","offer_id":43165405511769,"sku":"Pro10-P KIK NA","price":537.99,"currency_code":"USD","in_stock":true},{"title":"Standard - Hex and Flag","offer_id":43165405544537,"sku":"Pro10-P KIK HEX","price":567.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/proline-x-enclosure-x-series-fits-kicker-solo-x-8-subwoofersubwoofer-enclosuresproline-x-9950209.jpg?v=1774479103"},{"product_id":"kicker-solo-x-8-subwoofer-box-professional-series-enclosure","title":"Kicker Solo-Baric L7X 8 Box: Ported 8\" Professional Series Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap 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th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Enclosure | X Series | Fits Kicker Solo X 8\" Subwoofer\u003c\/h2\u003e\n  \u003cp\u003eAudio Intensity and Proline X are not affiliated with Kicker. This enclosure is built to the published parameters of the Kicker Solo-Baric L7X.\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e0.88 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 35.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003e2.25\" three-layer baffle\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Kicker Solo-Baric L7X 8\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 35.5 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe Solo-Baric L7X 8 pairs a low-Vas, high-Qts motor with a shallow mounting depth, and this cabinet is the compact single-eight box Kicker specifies for it. As built it holds 0.88 cubic feet net, vented at 35.5 Hz through an 21.9 square inch slot beside the woofer. It is the smallest ported enclosure in the professional Kicker line, sized for a single driver only.\u003c\/p\u003e\n  \u003cp\u003eKicker's own alignment for the L7X 8 lands F3 at 29.8 Hz on this airspace, and the port stays under the chuff threshold up to 960 W, above which the mouth velocity crosses Kicker's own reference. Ripple lands at 3.69 dB, over the ceiling we hold new designs to; this is the alignment Kicker publishes for the L7X and the box is built to it, so we ship what they specify rather than retune it. Set the subsonic filter at 31 Hz and leave it there below tuning.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe cabinet\u003c\/h3\u003e\n  \u003cp\u003e25.00\" W x 14.00\" H x 13.75\" D external, internally braced. It ships as a UPS parcel; the price includes shipping in the 48 states.\u003c\/p\u003e\n  \u003cp\u003eThis is our compact single-eight envelope, sized for one L7X 8 only. The baffle cutout is machined to the L7X's square frame, which is not cross-compatible with round-frame drivers of the same nominal size. You source the driver. We handle the box.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe numbers to respect\u003c\/h3\u003e\n  \u003cp\u003eKicker's own Klippel rig measured the L7X 8 under SKU 49L7X82, and the Dual 2 Ohm coil is the one they publish; the cabinet fits either the D1 or D2 version of this driver. Kicker publishes no outer frame dimension for the L7X, so the frame OD used here, 8.8125 inches, is estimated from the published cutout. Audio Intensity and Proline X are not affiliated with Kicker.\u003c\/p\u003e\n  \u003cp\u003eThis cabinet is 0.88 cubic feet net, with a slot port of 21.9 square inches tuned to 35.5 Hz; the port stays under the chuff threshold at 960 W, the design power basis.\u003c\/p\u003e\n  \u003cp\u003eSet a 28 Hz subsonic filter, 24 dB per octave. Below tuning the vent stops loading the cone; with the filter in place the cone reaches 9.8 mm of its 24.0 mm at 960 W.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Standard - Hex and Flag","offer_id":43139267592281,"sku":"Pro8-P KIK HEX","price":347.99,"currency_code":"USD","in_stock":true},{"title":"None - Carpet Only","offer_id":43139267559513,"sku":"Pro8-P KIK NA","price":317.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/proline-x-enclosure-x-series-fits-kicker-solo-x-8-subwoofersubwoofer-enclosuresproline-x-9950209.jpg?v=1774479103"},{"product_id":"proline-x-p8-p-single-8-ported-subwoofer-enclosure-v3","title":"Proline X P8-P | Single 8\" Ported Subwoofer Enclosure | V3","description":"\u003cstyle\u003e\n .px-desc {\n font-family: 'Helvetica Neue', Arial, sans-serif;\n line-height: 1.8;\n color: #1e293b;\n max-width: 1200px;\n margin: 0 auto;\n background: #ffffff;\n }\n\n .px-hero {\n background: linear-gradient(135deg, #0f172a 0%, #0e7490 100%);\n padding: 60px 40px;\n text-align: center;\n color: white;\n }\n\n .px-hero .px-title {\n font-size: 2.6em;\n font-weight: 800;\n text-transform: uppercase;\n letter-spacing: 2px;\n margin: 0 0 10px 0;\n color: white;\n }\n\n .px-hero .px-subtitle {\n font-size: 1.2em;\n font-weight: 300;\n opacity: 0.9;\n margin: 0 0 30px 0;\n }\n\n .px-badges {\n display: flex;\n justify-content: center;\n flex-wrap: wrap;\n gap: 12px;\n margin-top: 20px;\n }\n\n .px-badge {\n background: rgba(6, 182, 212, 0.2);\n border: 1px solid #06b6d4;\n color: #67e8f9;\n padding: 8px 20px;\n border-radius: 20px;\n font-size: 0.9em;\n font-weight: 600;\n letter-spacing: 0.5px;\n }\n\n .px-section {\n padding: 50px 40px;\n border-bottom: 1px solid #e2e8f0;\n background: #ffffff;\n }\n\n .px-section:nth-child(even) {\n background: #f0f9ff;\n }\n\n .px-section h2 {\n color: #0e7490;\n font-size: 2em;\n font-weight: 700;\n margin: 0 0 20px 0;\n padding-bottom: 12px;\n border-bottom: 3px solid #06b6d4;\n }\n\n .px-section h3 {\n color: #0f172a;\n font-size: 1.4em;\n font-weight: 600;\n margin: 30px 0 15px 0;\n }\n\n .px-section p {\n font-size: 1.05em;\n color: #334155;\n margin-bottom: 18px;\n }\n\n .px-section ul {\n margin: 15px 0;\n padding-left: 25px;\n }\n\n .px-section li {\n font-size: 1.05em;\n color: #334155;\n margin-bottom: 10px;\n line-height: 1.7;\n }\n\n .px-grid {\n display: grid;\n grid-template-columns: repeat(2, 1fr);\n gap: 24px;\n margin: 30px 0;\n }\n\n .px-card {\n background: #ffffff;\n border: 1px solid #e2e8f0;\n border-top: 4px solid #06b6d4;\n border-radius: 6px;\n padding: 24px;\n }\n\n .px-card h4 {\n color: #0e7490;\n font-size: 1.15em;\n font-weight: 700;\n margin: 0 0 12px 0;\n }\n\n .px-card p {\n font-size: 1em;\n color: #475569;\n margin: 0;\n line-height: 1.7;\n }\n\n .px-highlight {\n background: #f0f9ff;\n border-left: 5px solid #06b6d4;\n padding: 24px 28px;\n margin: 28px 0;\n border-radius: 0 6px 6px 0;\n }\n\n .px-highlight h3 {\n color: #0e7490;\n margin: 0 0 12px 0;\n font-size: 1.2em;\n }\n\n .px-highlight p {\n margin-bottom: 10px;\n color: #1e293b;\n }\n\n .px-cta {\n background: linear-gradient(135deg, #0f172a 0%, #0e7490 100%);\n padding: 60px 40px;\n text-align: center;\n color: white;\n }\n\n .px-cta h2 {\n font-size: 2.2em;\n font-weight: 700;\n margin: 0 0 20px 0;\n color: white;\n border: none;\n padding: 0;\n }\n\n .px-cta p {\n font-size: 1.15em;\n opacity: 0.92;\n max-width: 800px;\n margin: 0 auto 20px auto;\n color: white;\n }\n\n .px-driver-link {\n display: inline-block;\n background: #f0f9ff;\n border: 2px solid #06b6d4;\n border-radius: 6px;\n padding: 16px 24px;\n margin: 10px 10px 10px 0;\n text-decoration: none;\n color: #0e7490;\n font-weight: 700;\n font-size: 1em;\n transition: all 0.2s ease;\n }\n\n .px-driver-link:hover {\n background: #06b6d4;\n color: white;\n }\n\n @media (max-width: 768px) {\n .px-hero { padding: 40px 20px; }\n .px-hero .px-title { font-size: 1.8em; }\n .px-section { padding: 30px 20px; }\n .px-section h2 { font-size: 1.6em; }\n .px-grid { grid-template-columns: 1fr; }\n .px-cta { padding: 40px 20px; }\n .px-cta h2 { font-size: 1.6em; }\n }\n\u003c\/style\u003e\n\n\u003cdiv class=\"px-desc\"\u003e\n\n \u003c!-- Hero --\u003e\n \u003cdiv class=\"px-hero\"\u003e\n \u003cp class=\"px-title\"\u003eProline X P8-P\u003c\/p\u003e\n \u003cp class=\"px-subtitle\"\u003eSingle 8\" Ported Subwoofer Enclosure | V3\u003c\/p\u003e\n \u003cdiv class=\"px-badges\"\u003e\n \u003cspan class=\"px-badge\"\u003e0.75 ft³ Net\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003e36Hz Tuning\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003ePorted Bass Reflex\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003e0.75\" Single Baffle\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- Introduction --\u003e\n \u003cdiv class=\"px-section\"\u003e\n \u003ch2\u003eMaximum Output From a Single 8\". Properly Tuned.\u003c\/h2\u003e\n \u003cp\u003eThe \u003cstrong\u003eProline X P8-P\u003c\/strong\u003e is a single 8\" slot-ported enclosure built for installs that need the most output a single 8\" driver can produce. At \u003cstrong\u003e0.75 ft³ net\u003c\/strong\u003e and tuned to \u003cstrong\u003e36Hz\u003c\/strong\u003e, this enclosure gives an 8\" driver the air space and port geometry to operate at its efficiency peak. Strong output through the upper bass range, usable extension into the low 30s, and a response curve that works across music genres without being tuned for just one.\u003c\/p\u003e\n \u003cp\u003eAt \u003cstrong\u003e19\" wide, 11\" tall, and 13\" deep\u003c\/strong\u003e, the P8-P fits in most standard trunk setups without requiring custom fabrication. The \u003cstrong\u003e6.125\" max mounting depth\u003c\/strong\u003e covers most standard 8\" drivers including high-excursion SQ motors. Port geometry is CNC-cut to exact dimensions. Tuning is consistent unit to unit with no hand-cut variance in port length or cross-section.\u003c\/p\u003e\n \u003cp\u003eEvery panel is CNC-cut from \u003cstrong\u003eLangboard Elite MDF\u003c\/strong\u003e to exact internal volume and assembled by hand in our Tennessee facility. A single recessed \u003cstrong\u003eABS\/Carbon Fiber Composite terminal cup\u003c\/strong\u003e handles wiring, pre-wired with \u003cstrong\u003e12g OFC speaker wire\u003c\/strong\u003e. Finish options are Dark Gray Trunkliner or Plush Black. Shipping is included.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003c!-- Why Ported --\u003e\n \u003cdiv class=\"px-section\"\u003e\n \u003ch2\u003eWhy Ported at 36Hz for a Single 8\"\u003c\/h2\u003e\n \u003cp\u003eA sealed 8\" enclosure at 0.45 ft³ produces accurate, controlled bass with a flat response. The P8-P trades some of that precision for significantly more output and lower frequency extension, the correct tradeoff when the install goal is impact rather than accuracy. The ported alignment at \u003cstrong\u003e36Hz\u003c\/strong\u003e pushes the efficiency peak into the upper sub-bass range, where the majority of bass content in music lives.\u003c\/p\u003e\n \u003cp\u003eAt 36Hz, port output peaks at a frequency that covers kick drum fundamentals, bass guitar low notes, and the sub-bass range in hip-hop and electronic music. Driver excursion is minimized at tuning, the port handles the acoustic load, which means the driver produces more output with less mechanical stress at the frequencies that matter most.\u003c\/p\u003e\n \u003cdiv class=\"px-grid\"\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eExtended Low-Frequency Output\u003c\/h4\u003e\n \u003cp\u003ePorted alignment at 36Hz extends usable bass output significantly lower than a sealed equivalent. The P8-P produces audible, impactful output well below 40Hz. Territory a sealed 8\" at 0.45 ft³ cannot reach at the same efficiency.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eHigher Efficiency Per Watt\u003c\/h4\u003e\n \u003cp\u003ePorted enclosures convert amplifier power to acoustic output more efficiently than sealed designs near the tuning frequency. More output from the same amplifier, a meaningful advantage in installs where amplifier headroom is limited.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eReduced Excursion at Tuning\u003c\/h4\u003e\n \u003cp\u003eAt and near 36Hz, the port handles the acoustic load and driver excursion drops significantly. Less mechanical stress on the driver at the frequencies where 8\" drivers are most vulnerable to over-excursion.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003e36Hz: Balanced and General-Purpose\u003c\/h4\u003e\n \u003cp\u003e36Hz provides strong output through the upper sub-bass without the port velocity issues that come with tuning too low on a single 8\" enclosure. It is a genre-agnostic tuning point that performs across hip-hop, rock, and electronic equally.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- Construction --\u003e\n \u003cdiv class=\"px-section\"\u003e\n \u003ch2\u003eConstruction: The Same Standard Across Every Proline X SKU\u003c\/h2\u003e\n \u003cp\u003eThe P8-P uses the same construction methodology as every enclosure in the Proline X Performance Series. The variables are dimensions, volume, and alignment. The build quality, Langboard Elite MDF, V-groove and dado joinery, in-house terminal cup, is consistent across the entire lineup.\u003c\/p\u003e\n\n \u003ch3\u003eLangboard Elite MDF, Named, Verified, Documented\u003c\/h3\u003e\n \u003cp\u003eEvery panel is cut from \u003cstrong\u003eLangboard Elite MDF: 3\/4\" (18mm)\u003c\/strong\u003e, a named, mill-documented panel stock produced in the United States. The specifications below are pulled from Langboard's published mill data, not marketing copy.\u003c\/p\u003e\n\n \u003cdiv class=\"px-highlight\"\u003e\n \u003ch3\u003eLangboard Elite: Published Mill Data\u003c\/h3\u003e\n \u003cp\u003e\u003cstrong\u003eDensity:\u003c\/strong\u003e 48.5 lbs\/ft³, higher density means less porosity, better screw retention, and reduced resonance\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eInternal Bond:\u003c\/strong\u003e 200 psi, resistance to delamination under sustained bass pressure cycling\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eModulus of Elasticity:\u003c\/strong\u003e 410,000 psi, panel stiffness under load; less flex means less resonance\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eFace Screw Holding:\u003c\/strong\u003e 325 lbs, baffle hardware stays locked under vibration\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eEdge Screw Holding:\u003c\/strong\u003e 250 lbs, joint integrity at every panel edge connection\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003ch3\u003eV-Groove and Dado Joinery\u003c\/h3\u003e\n \u003cp\u003eEvery panel joint uses \u003cstrong\u003eV-groove and dado joinery\u003c\/strong\u003e, CNC-cut interlocking grooves that mechanically lock panels before adhesive is applied. The dado creates a tongue-and-groove mechanical interlock that resists shear forces regardless of glue condition. Every corner is locked. Every seam is airtight. Port geometry is CNC-cut to exact dimensions. No hand-cut variance in port length or cross-section means tuning frequency is consistent unit to unit.\u003c\/p\u003e\n\n \u003ch3\u003eIn-House ABS\/Carbon Fiber Composite Terminal Cup\u003c\/h3\u003e\n \u003cp\u003eThe terminal cup is built in-house at our Tennessee facility. The \u003cstrong\u003eABS\/Carbon Fiber Composite recessed cup\u003c\/strong\u003e features stainless steel hardware, aluminum landing plates, and copper ring terminals, pre-wired with \u003cstrong\u003e12g OFC speaker wire\u003c\/strong\u003e. The recessed mount protects terminals from cargo contact. Copper ring terminals provide a clean, corrosion-resistant connection that does not loosen under vibration.\u003c\/p\u003e\n\n \u003cdiv class=\"px-grid\"\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eShopSabre CNC Routers\u003c\/h4\u003e\n \u003cp\u003eEvery panel and port is machine-cut on ShopSabre industrial CNC routers. Consistent geometry, no hand-cut variance. Port length, cross-section, and panel dimensions are identical across every unit.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eHand-Assembled in Tennessee\u003c\/h4\u003e\n \u003cp\u003eEvery enclosure is hand-assembled at our Tennessee facility and inspected before it ships. No overseas manufacturing. No batch assembly shortcuts.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eDark Gray Trunkliner or Plush Black\u003c\/h4\u003e\n \u003cp\u003eBoth finish options are professionally applied. Dark Gray Trunkliner blends with factory trunk materials. Plush Black delivers the traditional aftermarket look. Both are durably bonded for long-term wear.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eShipping Included\u003c\/h4\u003e\n \u003cp\u003eNo freight charges at checkout. The price you see is the price you pay. The enclosure ships assembled and ready to install.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- Fitment --\u003e\n \u003cdiv class=\"px-section\"\u003e\n \u003ch2\u003eFitment Guide\u003c\/h2\u003e\n \u003cp\u003eThe P8-P is sized for standard trunk installs. At \u003cstrong\u003e19\"W x 11\"H x 13\"D\u003c\/strong\u003e it fits in most sedan and truck trunk configurations without custom fabrication. The 13\" depth is the critical dimension. Measure your available trunk depth before ordering.\u003c\/p\u003e\n\n \u003ch3\u003eDimensional Specifications\u003c\/h3\u003e\n \u003cdiv class=\"px-highlight\"\u003e\n \u003cp\u003e\u003cstrong\u003eExternal Dimensions:\u003c\/strong\u003e 19\" W x 11\" H x 13\" D\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eNet Internal Volume:\u003c\/strong\u003e 0.75 ft³\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eTuning Frequency:\u003c\/strong\u003e 36Hz\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eSubwoofer Cutout:\u003c\/strong\u003e 7.25\"\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eMax Mounting Depth:\u003c\/strong\u003e 6.125\"\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eFront Panel Thickness:\u003c\/strong\u003e 0.75\" Single Baffle\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003ch3\u003eDriver Compatibility\u003c\/h3\u003e\n \u003cp\u003eThe P8-P accommodates any 8\" subwoofer with a cutout diameter at or below \u003cstrong\u003e7.25\"\u003c\/strong\u003e and a mounting depth at or below \u003cstrong\u003e6.125\"\u003c\/strong\u003e. Verify both dimensions against your driver's published specifications before ordering.\u003c\/p\u003e\n\n \u003ch3\u003eCompatible Drivers\u003c\/h3\u003e\n \u003cp\u003eThe following drivers are available from Audio Intensity and are compatible with the P8-P:\u003c\/p\u003e\n \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/image-dynamics-id8-v4-8inch-subwoofer\"\u003eImage Dynamics ID8 V4 \u003c\/a\u003e\n \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/prodigy-audio-8-inch-subwoofer-nb2-series\"\u003eProdigy NB2-8D4 \u003c\/a\u003e\n \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/image-dynamics-idq8d2-v4-8inch-subwoofer\"\u003eImage Dynamics IDQ8 V4 \u003c\/a\u003e\n \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/prodigy-audio-8-inch-subwoofer-nb5-series\"\u003eProdigy NB5-8D4 \u003c\/a\u003e\n \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/arc-audio-arc-series-8-subwoofer\"\u003eArc Audio Arc Series 8\" \u003c\/a\u003e\n \u003cp style=\"font-size:0.9em; color:#64748b; margin-top:12px;\"\u003eAlways verify cutout diameter and mounting depth against your specific driver's published specifications before ordering.\u003c\/p\u003e\n\n \u003ch3\u003eIdeal Install Applications\u003c\/h3\u003e\n \u003cdiv class=\"px-grid\"\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eStandard Trunk Builds\u003c\/h4\u003e\n \u003cp\u003eAt 19\" wide and 13\" deep, the P8-P fits in most standard sedan and truck trunk configurations. It is the natural step up from the P8-S when output is the priority over accuracy.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eDaily Driver Systems\u003c\/h4\u003e\n \u003cp\u003eThe 36Hz tuning and 0.75 ft³ volume produce a bass response that works across music genres without requiring system-specific tuning. A strong general-purpose single 8\" ported build for daily use.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eHigh-Output Compact Builds\u003c\/h4\u003e\n \u003cp\u003eFor installs where a 10\" or 12\" enclosure is too large but a sealed 8\" is not enough, the P8-P fills that gap. Maximum output from the 8\" driver format in a footprint that fits where larger boxes do not.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eBehind Rear Seat\u003c\/h4\u003e\n \u003cp\u003eAt 11\" tall and 13\" deep, the P8-P fits behind most rear seats in full-size sedans and trucks. Confirm your available depth before ordering. 13\" is deeper than the sealed P8-S.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- CTA --\u003e\n \u003cdiv class=\"px-cta\"\u003e\n \u003ch2\u003eMaximum 8\" Output. Tennessee-Built. Shipping Included.\u003c\/h2\u003e\n \u003cp\u003eThe Proline X P8-P is a single 8\" ported enclosure built to a spec, not a price point. Langboard Elite MDF. V-groove and dado joinery. CNC-cut port geometry. In-house terminal cup. Hand-assembled in Tennessee and inspected before it ships.\u003c\/p\u003e\n \u003cp\u003eIf you need the most output a single 8\" driver can produce in a compact footprint, this is the correct enclosure. \u003cstrong\u003e$169.99 Dark Gray Trunkliner. $179.99 Plush Black.\u003c\/strong\u003e Shipping included.\u003c\/p\u003e\n \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Dark Gray Trunkliner","offer_id":43145492004953,"sku":"P8-P III G","price":169.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black","offer_id":43145492037721,"sku":"P8-P III B","price":179.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/proline-x-p8-p-single-8-ported-subwoofer-enclosure-v3subwoofer-enclosuresproline-x-4457050.png?v=1773362894"},{"product_id":"proline-x-p8d-p-dual-8-ported-subwoofer-enclosure-v3","title":"Proline X P8D-P | Dual 8\" Ported Subwoofer Enclosure | V3","description":"\u003cstyle\u003e\n .px-desc {\n font-family: 'Helvetica Neue', Arial, sans-serif;\n line-height: 1.8;\n color: #1e293b;\n max-width: 1200px;\n margin: 0 auto;\n background: #ffffff;\n }\n\n .px-hero {\n background: linear-gradient(135deg, #0f172a 0%, #0e7490 100%);\n padding: 60px 40px;\n text-align: center;\n color: white;\n }\n\n .px-hero .px-title {\n font-size: 2.6em;\n font-weight: 800;\n text-transform: uppercase;\n letter-spacing: 2px;\n margin: 0 0 10px 0;\n color: white;\n }\n\n .px-hero .px-subtitle {\n font-size: 1.2em;\n font-weight: 300;\n opacity: 0.9;\n margin: 0 0 30px 0;\n }\n\n .px-badges {\n display: flex;\n justify-content: center;\n flex-wrap: wrap;\n gap: 12px;\n margin-top: 20px;\n }\n\n .px-badge {\n background: rgba(6, 182, 212, 0.2);\n border: 1px solid #06b6d4;\n color: #67e8f9;\n padding: 8px 20px;\n border-radius: 20px;\n font-size: 0.9em;\n font-weight: 600;\n letter-spacing: 0.5px;\n }\n\n .px-section {\n padding: 50px 40px;\n border-bottom: 1px solid #e2e8f0;\n background: #ffffff;\n }\n\n .px-section:nth-child(even) {\n background: #f0f9ff;\n }\n\n .px-section h2 {\n color: #0e7490;\n font-size: 2em;\n font-weight: 700;\n margin: 0 0 20px 0;\n padding-bottom: 12px;\n border-bottom: 3px solid #06b6d4;\n }\n\n .px-section h3 {\n color: #0f172a;\n font-size: 1.4em;\n font-weight: 600;\n margin: 30px 0 15px 0;\n }\n\n .px-section p {\n font-size: 1.05em;\n color: #334155;\n margin-bottom: 18px;\n }\n\n .px-section ul {\n margin: 15px 0;\n padding-left: 25px;\n }\n\n .px-section li {\n font-size: 1.05em;\n color: #334155;\n margin-bottom: 10px;\n line-height: 1.7;\n }\n\n .px-grid {\n display: grid;\n grid-template-columns: repeat(2, 1fr);\n gap: 24px;\n margin: 30px 0;\n }\n\n .px-card {\n background: #ffffff;\n border: 1px solid #e2e8f0;\n border-top: 4px solid #06b6d4;\n border-radius: 6px;\n padding: 24px;\n }\n\n .px-card h4 {\n color: #0e7490;\n font-size: 1.15em;\n font-weight: 700;\n margin: 0 0 12px 0;\n }\n\n .px-card p {\n font-size: 1em;\n color: #475569;\n margin: 0;\n line-height: 1.7;\n }\n\n .px-highlight {\n background: #f0f9ff;\n border-left: 5px solid #06b6d4;\n padding: 24px 28px;\n margin: 28px 0;\n border-radius: 0 6px 6px 0;\n }\n\n .px-highlight h3 {\n color: #0e7490;\n margin: 0 0 12px 0;\n font-size: 1.2em;\n }\n\n .px-highlight p {\n margin-bottom: 10px;\n color: #1e293b;\n }\n\n .px-cta {\n background: linear-gradient(135deg, #0f172a 0%, #0e7490 100%);\n padding: 60px 40px;\n text-align: center;\n color: white;\n }\n\n .px-cta h2 {\n font-size: 2.2em;\n font-weight: 700;\n margin: 0 0 20px 0;\n color: white;\n border: none;\n padding: 0;\n }\n\n .px-cta p {\n font-size: 1.15em;\n opacity: 0.92;\n max-width: 800px;\n margin: 0 auto 20px auto;\n color: white;\n }\n\n .px-driver-link {\n display: inline-block;\n background: #f0f9ff;\n border: 2px solid #06b6d4;\n border-radius: 6px;\n padding: 16px 24px;\n margin: 10px 10px 10px 0;\n text-decoration: none;\n color: #0e7490;\n font-weight: 700;\n font-size: 1em;\n transition: all 0.2s ease;\n }\n\n .px-driver-link:hover {\n background: #06b6d4;\n color: white;\n }\n\n @media (max-width: 768px) {\n .px-hero { padding: 40px 20px; }\n .px-hero .px-title { font-size: 1.8em; }\n .px-section { padding: 30px 20px; }\n .px-section h2 { font-size: 1.6em; }\n .px-grid { grid-template-columns: 1fr; }\n .px-cta { padding: 40px 20px; }\n .px-cta h2 { font-size: 1.6em; }\n }\n\u003c\/style\u003e\n\n\u003cdiv class=\"px-desc\"\u003e\n\n \u003c!-- Hero --\u003e\n \u003cdiv class=\"px-hero\"\u003e\n \u003cp class=\"px-title\"\u003eProline X P8D-P\u003c\/p\u003e\n \u003cp class=\"px-subtitle\"\u003eDual 8\" Ported Subwoofer Enclosure | V3\u003c\/p\u003e\n \u003cdiv class=\"px-badges\"\u003e\n \u003cspan class=\"px-badge\"\u003e1.5 ft³ Net\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003e36Hz Tuning\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003ePorted Bass Reflex\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003eSingle Shared Cup\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e\n \u003cspan class=\"px-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- Introduction --\u003e\n \u003cdiv class=\"px-section\"\u003e\n \u003ch2\u003eDual 8\" Ported Output. Compact Enough to Fit Where Larger Boxes Cannot.\u003c\/h2\u003e\n \u003cp\u003eThe \u003cstrong\u003eProline X P8D-P\u003c\/strong\u003e is a dual 8\" slot-ported enclosure built for installs that need serious output from a footprint that a 10\" or 12\" ported box cannot match. At \u003cstrong\u003e1.5 ft³ net\u003c\/strong\u003e, 0.75 ft³ per driver, and tuned to \u003cstrong\u003e36Hz\u003c\/strong\u003e, this enclosure gives two 8\" drivers the combined air space and port geometry to produce output that competes with a single 12\" ported enclosure while staying within the dimensional constraints of a dual 8\" build.\u003c\/p\u003e\n \u003cp\u003eAt \u003cstrong\u003e24\" wide, 11\" tall, and 16\" deep\u003c\/strong\u003e, the P8D-P is sized for a dedicated trunk build. The 16\" depth is the critical dimension. This enclosure fits across most trunk floors but is not a behind-seat option. The \u003cstrong\u003e7.3\" max mounting depth\u003c\/strong\u003e covers most standard 8\" drivers. A single terminal cup handles wiring for both drivers internally. Both drivers must be run at the same impedance.\u003c\/p\u003e\n \u003cp\u003eEvery panel is CNC-cut from \u003cstrong\u003eLangboard Elite MDF\u003c\/strong\u003e to exact internal volume and assembled by hand in our Tennessee facility. Port geometry is CNC-cut to exact dimensions. Tuning is consistent unit to unit. Finish options are Dark Gray Trunkliner or Plush Black. Shipping is included.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003c!-- Why Ported --\u003e\n \u003cdiv class=\"px-section\"\u003e\n \u003ch2\u003eWhy Dual 8\" Ported at 36Hz\u003c\/h2\u003e\n \u003cp\u003eTwo 8\" drivers in a ported enclosure at 36Hz produce a fundamentally different output profile than either a dual 8\" sealed or a single larger ported driver. The combined cone area of two 8\" drivers approaches a single 12\", and the ported alignment at 36Hz pushes that combined output into the upper sub-bass range where the efficiency peak delivers the most audible impact. The result is output that fills larger vehicles and dedicated listening spaces without requiring a larger driver format.\u003c\/p\u003e\n \u003cp\u003eAt 0.75 ft³ per driver, each chamber is well within the recommended ported range for most 8\" subwoofers. Port velocity stays controlled at these volumes, no chuffing, no audible port noise at real-world listening levels. Both drivers are working the same correctly-sized air load at the same tuning frequency.\u003c\/p\u003e\n \u003cdiv class=\"px-grid\"\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eCombined Cone Area\u003c\/h4\u003e\n \u003cp\u003eTwo 8\" drivers in ported alignment produce combined cone area and output that approaches a single 12\" ported enclosure, in a box that is significantly shorter and fits installations a 12\" cannot.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003e36Hz Tuning: Efficient and Extended\u003c\/h4\u003e\n \u003cp\u003e36Hz places the port output peak in the upper sub-bass range where bass impact is most audible. Strong output from the mid-30s through the upper bass range without the port velocity issues that come with tuning too low on a dual 8\" build.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003e0.75 ft³ Per Driver\u003c\/h4\u003e\n \u003cp\u003eEach driver bay provides 0.75 ft³ of net internal volume, the center of the recommended ported range for most 8\" drivers. Both drivers operate at the same correctly-sized air load with controlled port velocity at listening levels.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eWide Bass Dispersion\u003c\/h4\u003e\n \u003cp\u003eTwo drivers spaced across a 24\" baffle produce a wider, more even bass presentation across the vehicle cabin than a single driver of any size. Low-frequency output is distributed more evenly from driver seat to passenger seat.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- Construction --\u003e\n \u003cdiv class=\"px-section\"\u003e\n \u003ch2\u003eConstruction: CNC-Cut Port Geometry, Single Shared Terminal Cup\u003c\/h2\u003e\n \u003cp\u003eThe P8D-P uses the same Langboard Elite MDF and V-groove and dado joinery construction as every enclosure in the Proline X Performance Series. The port geometry is CNC-cut to exact dimensions. Port length and cross-section are consistent unit to unit, which means tuning frequency does not vary between enclosures. A single terminal cup handles both drivers internally.\u003c\/p\u003e\n\n \u003ch3\u003eLangboard Elite MDF, Named, Verified, Documented\u003c\/h3\u003e\n \u003cp\u003eEvery panel is cut from \u003cstrong\u003eLangboard Elite MDF: 3\/4\" (18mm)\u003c\/strong\u003e, a named, mill-documented panel stock produced in the United States. The specifications below are pulled directly from Langboard's published mill data.\u003c\/p\u003e\n\n \u003cdiv class=\"px-highlight\"\u003e\n \u003ch3\u003eLangboard Elite: Published Mill Data\u003c\/h3\u003e\n \u003cp\u003e\u003cstrong\u003eDensity:\u003c\/strong\u003e 48.5 lbs\/ft³, higher density means less porosity, better screw retention, and reduced resonance\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eInternal Bond:\u003c\/strong\u003e 200 psi, resistance to delamination under sustained bass pressure cycling\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eModulus of Elasticity:\u003c\/strong\u003e 410,000 psi, panel stiffness under load; less flex means less resonance\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eFace Screw Holding:\u003c\/strong\u003e 325 lbs, baffle hardware stays locked under vibration\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eEdge Screw Holding:\u003c\/strong\u003e 250 lbs, joint integrity at every panel edge connection\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003ch3\u003eV-Groove and Dado Joinery\u003c\/h3\u003e\n \u003cp\u003eEvery panel joint uses \u003cstrong\u003eV-groove and dado joinery\u003c\/strong\u003e, CNC-cut interlocking grooves that mechanically lock panels before adhesive is applied. Port panels are joined with the same interlocking geometry as the enclosure walls, consistent, airtight, and resistant to shear forces at the joint level rather than relying solely on adhesive.\u003c\/p\u003e\n\n \u003ch3\u003eSingle Terminal Cup: Same Impedance Required\u003c\/h3\u003e\n \u003cp\u003eThe P8D-P uses a single \u003cstrong\u003eABS\/Carbon Fiber Composite recessed terminal cup\u003c\/strong\u003e built in-house at our Tennessee facility. Both drivers are wired internally to the cup with stainless steel hardware, aluminum landing plates, and copper ring terminals, pre-wired with \u003cstrong\u003e12g OFC speaker wire\u003c\/strong\u003e. Both drivers must be run at the same impedance. Confirm your amplifier output and driver impedances match before wiring.\u003c\/p\u003e\n\n \u003cdiv class=\"px-grid\"\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eCNC-Cut Port Geometry\u003c\/h4\u003e\n \u003cp\u003ePort length, cross-section, and position are machine-cut to exact dimensions on ShopSabre CNC routers. Tuning frequency is consistent unit to unit. No hand-cut variance in port dimensions.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eHand-Assembled in Tennessee\u003c\/h4\u003e\n \u003cp\u003eEvery enclosure is hand-assembled at our Tennessee facility and inspected before it ships. No overseas manufacturing. No batch assembly shortcuts.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eDark Gray Trunkliner or Plush Black\u003c\/h4\u003e\n \u003cp\u003eBoth finish options are professionally applied. Dark Gray Trunkliner blends with factory trunk materials. Plush Black delivers the traditional aftermarket look. Both are durably bonded for long-term wear.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eShipping Included\u003c\/h4\u003e\n \u003cp\u003eNo freight charges at checkout. The price you see is the price you pay. The enclosure ships assembled and ready to install.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- Fitment --\u003e\n \u003cdiv class=\"px-section\"\u003e\n \u003ch2\u003eFitment Guide\u003c\/h2\u003e\n \u003cp\u003eThe P8D-P is a dedicated trunk build. At \u003cstrong\u003e24\"W x 11\"H x 16\"D\u003c\/strong\u003e, the 16\" depth makes this a trunk floor enclosure, not a behind-seat option. Measure your available trunk depth carefully before ordering.\u003c\/p\u003e\n\n \u003ch3\u003eDimensional Specifications\u003c\/h3\u003e\n \u003cdiv class=\"px-highlight\"\u003e\n \u003cp\u003e\u003cstrong\u003eExternal Dimensions:\u003c\/strong\u003e 24\" W x 11\" H x 16\" D\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eNet Internal Volume:\u003c\/strong\u003e 1.5 ft³ (0.75 ft³ per driver)\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eTuning Frequency:\u003c\/strong\u003e 36Hz\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eSubwoofer Cutout:\u003c\/strong\u003e 7.25\"\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eMax Mounting Depth:\u003c\/strong\u003e 7.3\"\u003c\/p\u003e\n \u003cp\u003e\u003cstrong\u003eFront Panel Thickness:\u003c\/strong\u003e 0.75\" Single Baffle\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003ch3\u003eDriver Compatibility\u003c\/h3\u003e\n \u003cp\u003eThe P8D-P accommodates any 8\" subwoofer with a cutout diameter at or below \u003cstrong\u003e7.25\"\u003c\/strong\u003e and a mounting depth at or below \u003cstrong\u003e7.3\"\u003c\/strong\u003e. Both drivers must be the same model and impedance. Verify published specifications before ordering.\u003c\/p\u003e\n\n \u003ch3\u003eCompatible Drivers\u003c\/h3\u003e\n \u003cp\u003eThe following drivers are available from Audio Intensity and are compatible with the P8D-P:\u003c\/p\u003e\n \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/image-dynamics-id8-v4-8inch-subwoofer\"\u003eImage Dynamics ID8 V4 \u003c\/a\u003e\n \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/prodigy-audio-8-inch-subwoofer-nb2-series\"\u003eProdigy NB2-8D4 \u003c\/a\u003e\n \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/image-dynamics-idq8d2-v4-8inch-subwoofer\"\u003eImage Dynamics IDQ8 V4 \u003c\/a\u003e\n \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/prodigy-audio-8-inch-subwoofer-nb5-series\"\u003eProdigy NB5-8D4 \u003c\/a\u003e\n \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/arc-audio-arc-series-8-subwoofer\"\u003eArc Audio Arc Series 8\" \u003c\/a\u003e\n \u003cp style=\"font-size:0.9em; color:#64748b; margin-top:12px;\"\u003eAlways verify cutout diameter and mounting depth against your specific driver's published specifications before ordering. Both drivers must be run at the same impedance.\u003c\/p\u003e\n\n \u003ch3\u003eIdeal Install Applications\u003c\/h3\u003e\n \u003cdiv class=\"px-grid\"\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eDedicated Trunk Builds\u003c\/h4\u003e\n \u003cp\u003eAt 24\" wide and 16\" deep, the P8D-P is designed to span a trunk floor. The 16\" depth requires a dedicated trunk install. Measure your available depth before ordering.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eHigh-Output Compact Systems\u003c\/h4\u003e\n \u003cp\u003eTwo 8\" drivers in ported alignment produce output that competes with a single 12\" ported enclosure in a box that fits installations a 12\" cannot reach. Maximum output from the dual 8\" format.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eWide Soundstage Builds\u003c\/h4\u003e\n \u003cp\u003eTwo drivers spaced across a 24\" baffle produce a wider bass presentation than any single-driver enclosure. For installs where even bass distribution across the full cabin width is the goal.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"px-card\"\u003e\n \u003ch4\u003eStep Up From Sealed\u003c\/h4\u003e\n \u003cp\u003eFor builds currently running the P8D-S that need more output and lower frequency extension, the P8D-P is the direct step up. Same driver compatibility, significantly more output.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- CTA --\u003e\n \u003cdiv class=\"px-cta\"\u003e\n \u003ch2\u003eDual 8\" Ported Output. Tennessee-Built. Shipping Included.\u003c\/h2\u003e\n \u003cp\u003eThe Proline X P8D-P delivers dual 8\" ported performance from an enclosure that fits where larger boxes cannot. Langboard Elite MDF. V-groove and dado joinery. CNC-cut port geometry. In-house terminal cup. Hand-assembled in Tennessee and inspected before it ships.\u003c\/p\u003e\n \u003cp\u003eTwo drivers. Ported efficiency. Output that competes with a single 12\". \u003cstrong\u003e$199.99 Dark Gray Trunkliner. $209.99 Plush Black.\u003c\/strong\u003e Shipping included.\u003c\/p\u003e\n \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Dark Gray Trunkliner","offer_id":43146880450649,"sku":"P8D-P III G","price":199.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black","offer_id":43146880483417,"sku":"P8D-P III B","price":209.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/products\/proline-x-performance-p8d-p-ported-enclosure-for-dual-8subwoofer-enclosuresproline-x-428828.jpg?v=1761969155"},{"product_id":"proline-x-enclosure-x-series-fits-kicker-solo-x-8-subwoofer-dual","title":"Kicker Solo-Baric L7X 8 Dual Box: Ported 8\" Professional Series Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 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0}.df-graph-title{font-size:.78em;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:#a8a29e;margin:0 0 10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Enclosure | X Series | Fits Kicker Solo X 8\" Subwoofer | Dual\u003c\/h2\u003e\n  \u003cp\u003eAudio Intensity and Proline X are not affiliated with Kicker. This enclosure is built to the published parameters of the Kicker Solo-Baric L7X.\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.74 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 38.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003e2.25\" three-layer baffle\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Kicker Solo-Baric L7X 8\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 38.5 Hz\u003c\/h3\u003e\n  \u003cp\u003eTwo Solo-Baric L7X 8 drivers share this cabinet's common airspace: 1.74 cubic feet net total, vented at 38.5 Hz through a 43.8 square inch slot. Doubling the driver count doubles the airspace and the port area together, so each L7X 8 still sees the same per-driver conditions as the single-eight box.\u003c\/p\u003e\n  \u003cp\u003eF3 lands at 31.9 Hz on this pair, close to the single-eight figure because the per-driver airspace is essentially unchanged. The port stays under the chuff threshold up to 960 W combined, above which the mouth velocity crosses Kicker's own reference. Ripple lands at 4.66 dB, over the ceiling we hold new designs to; this is the alignment Kicker publishes for the L7X and the box is built to it. Set the subsonic filter at 30 Hz and leave it there below tuning.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe cabinet\u003c\/h3\u003e\n  \u003cp\u003e34.00\" W x 14.00\" H x 16.62\" D external, internally braced. It ships as a UPS parcel; the price includes shipping in the 48 states.\u003c\/p\u003e\n  \u003cp\u003eThis is our dual-eight envelope, sized for two L7X 8 drivers on one shared chamber. The baffle cutouts are machined to the L7X's square frame, which is not cross-compatible with round-frame drivers of the same nominal size. You source the driver. We handle the box.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe numbers to respect\u003c\/h3\u003e\n  \u003cp\u003eKicker's own Klippel rig measured the L7X 8 under SKU 49L7X82, the same parameters carried into both drivers in this dual cabinet; the Dual 2 Ohm coil is the one they publish, and the cabinet fits either the D1 or D2 version of the driver. Kicker publishes no outer frame dimension for the L7X, so the frame OD used here, 8.8125 inches, is estimated from the published cutout. Audio Intensity and Proline X are not affiliated with Kicker.\u003c\/p\u003e\n  \u003cp\u003eThis cabinet is 1.74 cubic feet net, with a slot port of 43.8 square inches tuned to 38.5 Hz; the port stays under the chuff threshold at 960 W, the design power basis.\u003c\/p\u003e\n  \u003cp\u003eSet a 30 Hz subsonic filter, 24 dB per octave. Below tuning the vent stops loading the cone; with the filter in place the cone reaches 9.5 mm of its 24.0 mm at 960 W.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Hex and Flag","offer_id":43165552279641,"sku":"Pro8D-P KIK HEX","price":506.99,"currency_code":"USD","in_stock":true},{"title":"None - Carpet Only","offer_id":43165552214105,"sku":"Pro8D-P KIK NA","price":476.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/proline-x-enclosure-x-series-fits-kicker-solo-x-8-subwoofer-dualsubwoofer-enclosuresproline-x-5634581.jpg?v=1774535928"},{"product_id":"proline-x-enclosure-x-series-fits-kicker-solo-x-10-subwoofer-dual","title":"Kicker Solo-Baric L7X 10 Dual Box: Ported 10\" Professional Series Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 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0}.df-graph-title{font-size:.78em;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:#a8a29e;margin:0 0 10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Enclosure | X Series | Fits Kicker Solo X 10\" Subwoofer | Dual\u003c\/h2\u003e\n  \u003cp\u003eAudio Intensity and Proline X are not affiliated with Kicker. This enclosure is built to the published parameters of the Kicker Solo-Baric L7X.\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e4.00 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 31.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTriple 2.25\" baffle\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Kicker Solo-Baric L7X 10\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 31.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eTwo Solo-Baric L7X 10 drivers share this cabinet's airspace: 4.00 cubic feet net total, vented at 31.0 Hz through a 61.2 square inch slot. The per-driver conditions match the single-ten box; only the total airspace and port area double.\u003c\/p\u003e\n  \u003cp\u003eF3 lands at 26.3 Hz on this pair, and passband ripple holds at 4.46 dB, inside the ceiling we hold new designs to. The port stays under the chuff threshold up to 517 W combined, above which the mouth velocity crosses Kicker's own reference. Set the subsonic filter at 24 Hz and leave it there below tuning.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe cabinet\u003c\/h3\u003e\n  \u003cp\u003e38.00\" W x 13.75\" H x 22.75\" D external, internally braced. It ships as a UPS parcel; the price includes shipping in the 48 states.\u003c\/p\u003e\n  \u003cp\u003eThis is our dual-ten envelope, sized for two L7X 10 drivers on one shared chamber. The baffle cutouts are machined to the L7X's square frame, which is not cross-compatible with round-frame drivers of the same nominal size. You source the driver. We handle the box.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe numbers to respect\u003c\/h3\u003e\n  \u003cp\u003eKicker's own Klippel rig measured the L7X 10 under SKU 49L7X102, the same parameters carried into both drivers in this dual cabinet; the Dual 2 Ohm coil is the one they publish, and the cabinet fits either the D1 or D2 version of the driver. Kicker publishes no outer frame dimension for the L7X, so the frame OD used here, 10.8125 inches, is estimated from the published cutout. Audio Intensity and Proline X are not affiliated with Kicker.\u003c\/p\u003e\n  \u003cp\u003eThis cabinet is 4.00 cubic feet net, with a slot port of 61.2 square inches tuned to 31.0 Hz; the port stays under the chuff threshold up to 517 W; above that the air at the mouth moves faster than the 17 metres per second where a slot starts to chuff.\u003c\/p\u003e\n  \u003cp\u003eSet a 24 Hz subsonic filter, 24 dB per octave. Below tuning the vent stops loading the cone; with the filter in place the cone reaches 16.9 mm of its 31.2 mm at 3000 W.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"None - Carpet Only","offer_id":43178306699353,"sku":"Pro10D-P KIK NA","price":638.99,"currency_code":"USD","in_stock":true},{"title":"Hex and Flag","offer_id":43178306732121,"sku":"Pro10D-P KIK HEX","price":668.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/proline-x-enclosure-x-series-fits-kicker-solo-x-8-subwoofer-dualsubwoofer-enclosuresproline-x-5634581.jpg?v=1774535928"},{"product_id":"proline-x-enclosure-professional-series-fits-jl-audio-12w7-subwoofer","title":"JL Audio 12W7AE Box: Ported 12\" Professional Series Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap 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0}.df-graph-title{font-size:.78em;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:#a8a29e;margin:0 0 10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Professional 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003eOne 12W7AE-3 in JL's own recommended ported volume, 1.75 cubic feet at 36.7 Hz, on a three-layer flush-mount baffle\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.77 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 36.7 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 33.3 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003e2.25\" three-layer baffle\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the 12W7AE-3\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.77\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e36.7\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e33.3\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e36.2\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 36.7 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe 12W7AE-3 is the 12 inch of JL Audio's W7AE line: 27.2 Hz, a Qts of 0.482, 66 litres of Vas, a single 3 ohm coil rated 1000 W RMS and 29 mm of one-way excursion from a 9.5 inch deep motor. JL recommends a 1.75 cubic foot ported box tuned to 36.7 Hz, and that is what this cabinet is: 1.77 cubic feet net behind a 2.25 inch three-layer baffle, tuned to 36.7 Hz through a 36.2 square inch slot beside the woofer, for an anechoic F3 of 33.3 Hz in a 30 by 16 by 14.9 inch front-firing box.\u003c\/p\u003e\n  \u003cp\u003eJL's own ported design uses a 1.875 by 13.5 inch slot, about 25 square inches. This one keeps JL's volume and tuning and opens the slot to 36.2 square inches: gated at 1200 W, 1.2 times JL's rating, the channel runs 19.3 m\/s against a 28.3 gate and the mouth 12.9 m\/s, and the cone peaks at 10.5 of its 29 mm with the subsonic filter in place. Sealed, JL's 1.375 cubic foot box is a Qtc of 0.79 with an F3 of 40.4 Hz.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhat makes it Professional\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThree-layer baffle, flush mount\u003c\/h4\u003e\n\u003cp\u003eThree layers of 3\/4 inch Langboard Elite make a 2.25 inch\n    front. The outer layer is routed to the flange, so the woofer sits flush with the face; the two layers behind it\n    carry the mounting hardware and the load.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eJL Audio logo acrylic\u003c\/h4\u003e\n\u003cp\u003eA glossy black acrylic insert with the JL Audio mark sits in the outer\n    layer beside the woofer. It is standard on every Professional cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eMounting\u003c\/h4\u003e\n\u003cp\u003eThreaded inserts pressed into the baffle on the published 11.270 inch bolt circle, stainless machine screws included.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003ePort gated at 1200 W\u003c\/h4\u003e\n\u003cp\u003eThe 36.2 square inch slot beside the woofer is sized so the\n    channel runs 19.3 metres per second and the mouth 12.9 metres per second at 1.2 times the driver's rating, under the\n    17 metres per second where a slot starts to chuff. The channel runs 8.62 inches along its wall and turns once along the back wall for another 16.87 inches, which is why a 36.7 Hz tuning fits a 14.88 inch deep box.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhy this is a Professional build\u003c\/h4\u003e\n\u003cp\u003eEvery driver is run through the Performance Optimized wedge and down-fire before this chassis; the Professional box is where a driver lands when that smaller envelope, 30 inches wide and 18 inches deep with a triangular side port, cannot give it what it needs at its rated power. The 12W7AE-3 did not clear the port gate there. The calmest wedge port that fits that envelope is 21.4 square inches at 27.0 by 12.25 by 17.89 inches, and its mouth runs 18.3 metres per second at 1000 W against the 17 metres per second line where a port starts to chuff. That port would stay clean to about 863 W. The slot on this box reaches 36.2 square inches and holds the mouth at 12.9 metres per second at 1200 W.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhat the price covers\u003c\/h4\u003e\n\u003cp\u003eEvery Professional cabinet is priced the same way, by its size: this one is 4.13 cubic feet outside. Delivery to the 48 states is inside the price; it ships as a 56 lb parcel and checkout adds nothing.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhat JL Audio recommend\u003c\/h4\u003e\n\u003cp\u003eJL Audio publish a vented box for the 12W7AE at 1.75 cubic feet net, tuned to 36.7 Hz. This cabinet holds 1.77 cubic feet net and tunes to 36.7 Hz.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe cabinet\u003c\/h3\u003e\n  \u003cp\u003e30.00\" W x 16.00\" H x 14.88\" D external. Two windowed braces run front to back either side of the woofer, clearing the cutout by two and a half inches. The box ships dry: polyfill detunes a ported alignment. 30 inches wide, 16 tall and 14.9 deep. 12.5 inch frame, flush in the outer baffle layer, 10.5 inch mounting hole, 9.5 inches of mounting depth. It ships as a parcel.\u003c\/p\u003e\n  \u003cp\u003eJL prints a full parameter table for the W7AE line and it holds together: Qes 0.514 and Qms 7.807 reproduce the published Qts of 0.482, and 217 grams of moving mass on a 158 micrometre per newton suspension reproduce the 27.2 Hz resonance and 66 litre Vas. Frame, mounting hole, mounting depth, bolt circle and displacement are all JL's own figures; nothing on this page is an estimate. The box is 30 inches wide rather than 32: at JL's 1.75 cubic feet a 32 inch box is too shallow for the port's back leg to pass behind the 9.5 inch motor.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe numbers to respect\u003c\/h3\u003e\n  \n  \u003cp\u003eSet a 29 Hz subsonic filter, 24 dB per octave. Below tuning the vent stops loading the cone; with the filter in\n  place the cone reaches 10.5 mm of its 29.0 mm at 1200 W.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":43199515590745,"sku":"Pro 12-P 12W7AE","price":481.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/Pro_12-P_12W7AE_Front.jpg?v=1790521460"},{"product_id":"proline-x-enclosure-professional-series-fits-jl-audio-10w7-subwoofer","title":"JL Audio 10W7AE Box: Ported 10\" Professional Series Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:54px 36px;text-align:center;color:#fff}.df-hero 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10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Professional 10\" Ported\u003c\/h2\u003e\n  \u003cp\u003eOne 10W7AE-3 in JL's own recommended ported volume, 1.5 cubic feet at 35.3 Hz, on a three-layer flush-mount baffle\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.48 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 35.3 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 30.9 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003e2.25\" three-layer baffle\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the 10W7AE-3\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.48\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e35.3\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e30.9\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e25.0\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 35.3 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe 10W7AE-3 is the 10 inch of JL Audio's W7AE line: 30.6 Hz, a Qts of 0.537, 36.1 litres of Vas, a single 3 ohm coil rated 750 W RMS and 23 mm of one-way excursion from an 8 inch deep motor. JL recommends a 1.5 cubic foot ported box tuned to 35.3 Hz, and that is what this cabinet is: 1.48 cubic feet net behind a 2.25 inch three-layer baffle, tuned to 35.3 Hz through a 25 square inch slot beside the woofer, for an anechoic F3 of 30.9 Hz in a 30 by 14 by 13.6 inch front-firing box.\u003c\/p\u003e\n  \u003cp\u003eJL's own ported design uses a 1.5 by 13 inch slot, 19.5 square inches. This one keeps JL's volume and tuning and opens the slot to 25 square inches so it stays quiet at power: gated at 900 W, 1.2 times JL's rating, the channel runs 22.5 m\/s against a 24.7 gate and the mouth 13.9 m\/s, and the cone peaks at 11.6 of its 23 mm with the subsonic filter in place. Sealed, JL's 1.25 cubic foot box is a Qtc of 0.76 with an F3 of 40.5 Hz.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhat makes it Professional\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThree-layer baffle, flush mount\u003c\/h4\u003e\n\u003cp\u003eThree layers of 3\/4 inch Langboard Elite make a 2.25 inch\n    front. The outer layer is routed to the flange, so the woofer sits flush with the face; the two layers behind it\n    carry the mounting hardware and the load.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eJL Audio logo acrylic\u003c\/h4\u003e\n\u003cp\u003eA glossy black acrylic insert with the JL Audio mark sits in the outer\n    layer beside the woofer. It is standard on every Professional cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eMounting\u003c\/h4\u003e\n\u003cp\u003eThreaded inserts pressed into the baffle on the published 9.340 inch bolt circle, stainless machine screws included.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003ePort gated at 900 W\u003c\/h4\u003e\n\u003cp\u003eThe 25.0 square inch slot beside the woofer is sized so the\n    channel runs 22.5 metres per second and the mouth 13.9 metres per second at 1.2 times the driver's rating, under the\n    17 metres per second where a slot starts to chuff. The channel runs 7.88 inches along its wall and turns once along the back wall for another 14.87 inches, which is why a 35.3 Hz tuning fits a 13.62 inch deep box.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhy this is a Professional build\u003c\/h4\u003e\n\u003cp\u003eThe 10W7AE-3 also builds in the Performance Optimized ported down-fire, the smaller and cheaper box. The Professional cabinet is the step up for it: a 2.25 inch three-layer baffle with the woofer flush in the outer layer, and a slot port gated at 900 W.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhat the price covers\u003c\/h4\u003e\n\u003cp\u003eEvery Professional cabinet is priced the same way, by its size: this one is 3.31 cubic feet outside. Delivery to the 48 states is inside the price; it ships as a 50 lb parcel and checkout adds nothing.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhat JL Audio recommend\u003c\/h4\u003e\n\u003cp\u003eJL Audio publish a vented box for the 10W7AE at 1.50 cubic feet net, tuned to 35.3 Hz. This cabinet holds 1.48 cubic feet net and tunes to 35.3 Hz.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe cabinet\u003c\/h3\u003e\n  \u003cp\u003e30.00\" W x 14.00\" H x 13.62\" D external. Two windowed braces run front to back either side of the woofer, clearing the cutout by two and a half inches. The box ships dry: polyfill detunes a ported alignment. 30 inches wide, 14 tall and 13.6 deep, the Professional envelope for a single 10. 10.5 inch frame, flush in the outer baffle layer, 8.74 inch mounting hole, 8 inches of mounting depth. It ships as a parcel.\u003c\/p\u003e\n  \u003cp\u003eJL prints a full parameter table for the W7AE line and it holds together: Qes 0.578 and Qms 7.647 reproduce the published Qts of 0.537, and 158 grams of moving mass on a 171 micrometre per newton suspension reproduce the 30.6 Hz resonance and 36.1 litre Vas. Frame, mounting hole, mounting depth, bolt circle and displacement are all JL's own figures; nothing on this page is an estimate.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe numbers to respect\u003c\/h3\u003e\n  \n  \u003cp\u003eSet a 28 Hz subsonic filter, 24 dB per octave. Below tuning the vent stops loading the cone; with the filter in\n  place the cone reaches 11.6 mm of its 23.0 mm at 900 W.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":43199590105177,"sku":"Pro 10-P 10W7AE","price":428.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/Pro_10-P_10W7AE_Front.jpg?v=1790521452"},{"product_id":"proline-x-enclosure-x-series-fits-dual-kicker-solo-x-12-subwoofer","title":"Kicker Solo-Baric L7X 12 Dual Box: Ported 12\" Professional Series Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:54px 36px;text-align:center;color:#fff}.df-hero 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10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Enclosure | X Series | Fits Dual Kicker Solo X 12\" Subwoofer\u003c\/h2\u003e\n  \u003cp\u003eAudio Intensity and Proline X are not affiliated with Kicker. This enclosure is built to the published parameters of the Kicker Solo-Baric L7X.\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e6.00 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 31.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTriple 2.25\" baffle\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Kicker Solo-Baric L7X 12\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 31.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eTwo Solo-Baric L7X 12 drivers share this cabinet's airspace: 6.00 cubic feet net total, vented at 31.0 Hz through a 91.0 square inch slot. The per-driver conditions match the single-twelve box; only the total airspace and port area double.\u003c\/p\u003e\n  \u003cp\u003eF3 lands at 26.5 Hz on this pair, and passband ripple holds at 2.61 dB, comfortably inside the ceiling we hold new designs to. The port stays under the chuff threshold up to 707 W combined, above which the mouth velocity crosses Kicker's own reference. Set the subsonic filter at 24 Hz and leave it there below tuning.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe cabinet\u003c\/h3\u003e\n  \u003cp\u003e44.00\" W x 16.00\" H x 27.50\" D external, internally braced. It ships as a UPS parcel; the price includes shipping in the 48 states.\u003c\/p\u003e\n  \u003cp\u003eThis is our dual-twelve envelope, sized for two L7X 12 drivers on one shared chamber. The baffle cutouts are machined to the L7X's square frame, which is not cross-compatible with round-frame drivers of the same nominal size. You source the driver. We handle the box.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe numbers to respect\u003c\/h3\u003e\n  \u003cp\u003eKicker's own Klippel rig measured the L7X 12 under SKU 49L7X122, the same parameters carried into both drivers in this dual cabinet; the Dual 2 Ohm coil is the one they publish, and the cabinet fits either the D1 or D2 version of the driver. Kicker publishes no outer frame dimension for the L7X, so the frame OD used here, 12.5625 inches, is estimated from the published cutout. This cabinet's shipping weight is estimated from its shell rather than measured on the dock. Scott's Q2 catalog sheet lists two different dual-twelve forms; the wider, shallower form actually on the store is the one this alignment is built to. Audio Intensity and Proline X are not affiliated with Kicker.\u003c\/p\u003e\n  \u003cp\u003eThis cabinet is 6.00 cubic feet net, with a slot port of 91.0 square inches tuned to 31.0 Hz; the port stays under the chuff threshold up to 707 W; above that the air at the mouth moves faster than the 17 metres per second where a slot starts to chuff.\u003c\/p\u003e\n  \u003cp\u003eSet a 24 Hz subsonic filter, 24 dB per octave. Below tuning the vent stops loading the cone; with the filter in place the cone reaches 16.3 mm of its 31.2 mm at 3000 W.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Standard - Hex and Flag","offer_id":43278391378009,"sku":"Pro12D-P KIK HEX","price":1249.99,"currency_code":"USD","in_stock":true},{"title":"None - Carpet Only","offer_id":43278391345241,"sku":"Pro12D-P KIK NA","price":1229.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/proline-x-enclosure-x-series-fits-dual-kicker-solo-x-12-subwoofersubwoofer-enclosuresproline-x-9144715.webp?v=1779355146"},{"product_id":"proline-x-enclosure-professional-series-fits-prodigy-15-nb5","title":"Prodigy NB5-15 Box: Ported 15\" Professional Series Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 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th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProfessional Series Ported 15\" Enclosure | Prodigy Audio NB5-15\u003c\/h2\u003e\n  \u003cp\u003eA ported fifteen-inch box built to Prodigy's own published numbers for the NB5-15, bare or loaded\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e3.01 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 33.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003e2.25\" three-layer baffle\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Prodigy NB5-15\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 33.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe Prodigy NB5-15 pairs a deep motor with a wide frame, and this cabinet gives it 3.01 cubic feet net, vented at 33.0 Hz through a 45.4 square inch port. F3 lands at 28.6 Hz with 1.56 dB of passband ripple. It is the largest single-driver box in the professional line, and it ships bare with a choice of baffle finish or loaded with the driver already mounted.\u003c\/p\u003e\n  \u003cp\u003eThe port on this box stays clean up to 1440 W before the mouth velocity crosses the chuff threshold, against the coil's own 1200 W power rating. Prodigy publish Xmax on a 70 percent BL basis for this driver, and the excursion check behind this build derates that figure further rather than taking the spec sheet number at face value. Ripple across the passband holds at 1.56 dB, and the in-car curve stays tight across the passband rather than peaking at either end.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe cabinet\u003c\/h3\u003e\n  \u003cp\u003e36.00\" W x 18.00\" H x 15.88\" D external, internally braced. It ships as a UPS parcel; the price includes shipping in the 48 states.\u003c\/p\u003e\n  \u003cp\u003eThis is our largest single-driver ported envelope in the professional line, sold bare with a choice of baffle finish or loaded with the NB5-15 already mounted in either coil.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe numbers to respect\u003c\/h3\u003e\n  \u003cp\u003eT\/S for the NB5-15 D2 are Prodigy's own published figures; the D4 version of this coil also fits this cabinet. There are no dimension or tuning conflicts between the Q2 catalog sheet and the store listing on this cabinet.\u003c\/p\u003e\n  \u003cp\u003eThis cabinet is 3.01 cubic feet net, with a slot port of 45.4 square inches tuned to 33.0 Hz; the port stays under the chuff threshold at 1440 W, the design power basis.\u003c\/p\u003e\n  \u003cp\u003eSet a 26 Hz subsonic filter, 24 dB per octave. Below tuning the vent stops loading the cone; with the filter in place the cone reaches 9.6 mm of its 22.9 mm at 1440 W.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"None \/ Yes add a NB5 15 D2","offer_id":43814512623705,"sku":"Pro15-P NB5 NA D2","price":1199.99,"currency_code":"USD","in_stock":true},{"title":"None \/ Yes add a NB5 15 D4","offer_id":43814512656473,"sku":"Pro15-P NB5 NA D4","price":1199.99,"currency_code":"USD","in_stock":true},{"title":"None \/ No Thanks","offer_id":43814512689241,"sku":"Pro15-P NB5 NA","price":567.99,"currency_code":"USD","in_stock":true},{"title":"Standard \/ Yes add a NB5 15 D2","offer_id":43814512722009,"sku":"Pro15-P NB5 STD D2","price":1199.99,"currency_code":"USD","in_stock":true},{"title":"Standard \/ Yes add a NB5 15 D4","offer_id":43814512754777,"sku":"Pro15-P NB5 STD D4","price":1199.99,"currency_code":"USD","in_stock":true},{"title":"Standard \/ No Thanks","offer_id":43814512787545,"sku":"Pro15-P NB5 STD","price":597.99,"currency_code":"USD","in_stock":true},{"title":"Hex \u0026 Flag \/ Yes add a NB5 15 D2","offer_id":43814512820313,"sku":"Pro15-P NB5 HXF D2","price":1199.99,"currency_code":"USD","in_stock":true},{"title":"Hex \u0026 Flag \/ Yes add a NB5 15 D4","offer_id":43814512853081,"sku":"Pro15-P NB5 HXF D4","price":1199.99,"currency_code":"USD","in_stock":true},{"title":"Hex \u0026 Flag \/ No Thanks","offer_id":43814512885849,"sku":"Pro15-P NB5 HXF","price":597.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/proline-x-enclosure-professional-series-fits-prodigy-15-nb5subwoofer-enclosuresproline-x-5697003.png?v=1784976188"},{"product_id":"performance-optimized-down-fire-ported-12-enclosure-prodigy-nb3-12","title":"Prodigy NB3-12 Box: Ported 12\" Shallow Down Fire Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica 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class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Performance Optimized Down Fire 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003eA 36 Hz motor vented at 35, and the flattest passband in the range\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.36 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 35.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 32.4 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Prodigy NB3-12\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.36\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e35.0\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e32.4\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e21.9\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 35.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe NB3-12 is a high-Fs motor. It resonates at 36.2 Hz in free air, which is well above where most twelves sit, and that single number decides the whole build: there is no point tuning a cabinet far below the frequency at which the driver stops wanting to move. So this one is vented at 35.0 Hz, just under Fs, and the result is the flattest passband of any enclosure in the ported range - 0.80 dB of ripple, where the rest of the family runs 1.1 to 4.4.\u003c\/p\u003e\n  \u003cp\u003eProdigy quote an EBP of 58.6, which lands in the transition band where a driver will take either load. That is not a reason to default to sealed. Vented at 35 the NB3-12 gives up nothing in flatness and gains real output through 30 to 45 Hz, and because tuning sits close to Fs the cone is barely moving where the port is working hardest.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe port is the product\u003c\/h3\u003e\n  \u003cp\u003eA ported cabinet is easy to get wrong and the failure is audible. This one uses an\n  L-wrap slot port: a single folded wall running down the long side of the box past the\n  woofer ring, turning once through a faceted 90 degree bend, and opening through a\n  chamfered corner. One wall, one bend, 27.86 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is 3.50 inches wide by 6.25 tall, 21.9 square inches, and it exits\n  through a 30.9 square inch mouth. Air leaves at 15.2 metres per second at the tuning\n  frequency, against the 17.0 metre per second threshold where a slot port starts to\n  chuff. The bend is faceted rather than square because the inner corner of a 90 degree\n  turn is where flow separates, and a sharp corner there is what you hear.\u003c\/p\u003e\n  \u003cdiv class=\"df-highlight\"\u003e\n    \u003cp\u003e\u003cstrong\u003eThis enclosure ships dry.\u003c\/strong\u003e Polyfill goes in every sealed Proline X\n    cabinet we build. It does not go in this one. Damping material in a vented box\n    changes the effective volume the port is tuned against, which moves the tuning\n    frequency away from the 35.0 Hz the port length was cut for. Adding it does not make\n    a ported box sound like a bigger ported box; it makes it a mistuned one.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eRun a subsonic filter\u003c\/h3\u003e\n  \u003cp\u003eThis is not optional advice on a vented enclosure. Below tuning the port stops\n  loading the cone and excursion climbs without limit toward DC, so a 28 Hz high-pass at\n  24 dB per octave is part of the specification rather than a refinement of it. Set it\n  and the same cabinet takes substantially more power for the same cone travel. Leave it\n  out and the driver runs out of suspension on material you cannot hear.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, not an electrical\n  one: it is the power at which the cone reaches the end of its linear travel in this\n  box. What the voice coil can dissipate as heat is a separate ceiling set by Prodigy, not by\n  the cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eCut for this driver, not for a catalogue\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eMounting\u003c\/h4\u003e\n\u003cp\u003eCut to Prodigy's published 10.875 inch cutout with a\n    13.250 inch ring bonded under the baffle. The ring drops into a machined recess so it\n    self-centres, and it roughly doubles the glue area over a butt joint.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThreaded, not screwed\u003c\/h4\u003e\n\u003cp\u003eEight #8-32 hurricane nuts are\n    driven into the ring before it is bonded, so the driver mounts into steel rather than\n    into MDF and survives being unbolted more than once. The ring is cut with sixteen\n    positions so the driver can be clocked to whatever orientation the install needs;\n    eight are fitted.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eA windowed brace sits between the woofer cutout\n    and the port terminus, 3.11 inches clear of the cutout edge. The window is not weight\n    saving: a solid panel there would split the cavity and turn the cabinet into a\n    bandpass.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eJoinery\u003c\/h4\u003e\n\u003cp\u003eV-groove and dado throughout, 0.75 inch\n    material, double-layer 1.5 inch baffle. The walls seat into dados in both the lid and\n    the baffle rather than butting against them.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003ePower, wiring and warranty\u003c\/h3\u003e\n  \u003cp\u003eProdigy rate the NB3-12 at 800 W RMS. Terminal cup is side mounted, as on every Performance\n  Optimized cabinet. If you are running a dual 2 ohm driver, note that parallel wiring\n  presents 1 ohm, which many amplifiers are not stable into; series at 4 ohm is the safe\n  default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. The enclosure is built to order in\n  Tullahoma, Tennessee, and the driver is not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-cta\"\u003e\n  \u003cp\u003eCut, folded and finished for the Prodigy NB3-12. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from Prodigy's published\n  parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44760251203673,"sku":"PO 12-P DF NB3","price":339.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_DF_NB3_Front_90848b0d-be9a-4d56-8b82-c7ae9e3c3436.jpg?v=1788319662"},{"product_id":"performance-optimized-down-fire-ported-12-enclosure-prodigy-nb2-12","title":"Prodigy NB2-12 Box: Ported 12\" Down Fire Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:54px 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10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Performance Optimized Down Fire 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003eA 28 Hz motor, the second lowest tuning in the range and a genuinely flatcar curve\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.36 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 33.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 33.4 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Prodigy NB2-12\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.36\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e33.5\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e33.4\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e20.3\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 33.5 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe NB2-12 is the opposite of its stablemate. Where the NB3 resonates at 36.2 Hz and wants tuning held high, this one sits at 28.37 Hz with 55.4 litres of Vas: a soft, large-compliance motor that keeps contributing well below where a stiffer driver has given up. That is what a vented alignment is for, and it is why this cabinet is tuned to 32.5 Hz, the lowest tuning of any twelve in the ported line.\u003c\/p\u003e\n  \u003cp\u003eLow Fs with high Vas is the textbook ported combination, and the result here is the second flattest in-car response we get out of a twelve: 1.5 dB of spread across 25 to 60 Hz. The mouth moves 13.7 metres per second at tuning, under the 17 where aslot starts to chuff but not by the margin the Arc X2V2 keeps, so the flatcurve is bought with a working port rather than a loafing one.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe port is the product\u003c\/h3\u003e\n  \u003cp\u003eA ported cabinet is easy to get wrong and the failure is audible. This one uses an\n  L-wrap slot port: a single folded wall running down the long side of the box past the\n  woofer ring, turning once through a faceted 90 degree bend, and opening through a\n  chamfered corner. One wall, one bend, 28.18 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is 3.25 inches wide by 6.25 tall, 20.3 square inches, and it exits\n  through a 26.5 square inch mouth. Air leaves at 11.9 metres per second at the tuning\n  frequency, against the 17.0 metre per second threshold where a slot port starts to\n  chuff. The bend is faceted rather than square because the inner corner of a 90 degree\n  turn is where flow separates, and a sharp corner there is what you hear.\u003c\/p\u003e\n  \u003cdiv class=\"df-highlight\"\u003e\n    \u003cp\u003e\u003cstrong\u003eThis enclosure ships dry.\u003c\/strong\u003e Polyfill goes in every sealed Proline X\n    cabinet we build. It does not go in this one. Damping material in a vented box\n    changes the effective volume the port is tuned against, which moves the tuning\n    frequency away from the 33.5 Hz the port length was cut for. Adding it does not make\n    a ported box sound like a bigger ported box; it makes it a mistuned one.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eRun a subsonic filter\u003c\/h3\u003e\n  \u003cp\u003eThis is not optional advice on a vented enclosure. Below tuning the port stops\n  loading the cone and excursion climbs without limit toward DC, so a 26 Hz high-pass at\n  24 dB per octave is part of the specification rather than a refinement of it. Set it\n  and the same cabinet takes substantially more power for the same cone travel. Leave it\n  out and the driver runs out of suspension on material you cannot hear.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, not an electrical\n  one: it is the power at which the cone reaches the end of its linear travel in this\n  box. What the voice coil can dissipate as heat is a separate ceiling set by Prodigy, not by\n  the cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eCut for this driver, not for a catalogue\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eMounting\u003c\/h4\u003e\n\u003cp\u003eCut to Prodigy's published 11.200 inch cutout with a\n    13.500 inch ring bonded under the baffle. The ring drops into a machined recess so it\n    self-centres, and it roughly doubles the glue area over a butt joint.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThreaded, not screwed\u003c\/h4\u003e\n\u003cp\u003eEight #8-32 hurricane nuts are\n    driven into the ring before it is bonded, so the driver mounts into steel rather than\n    into MDF and survives being unbolted more than once. The ring is cut with sixteen\n    positions so the driver can be clocked to whatever orientation the install needs;\n    eight are fitted.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eA windowed brace sits between the woofer cutout\n    and the port terminus, 2.82 inches clear of the cutout edge. The window is not weight\n    saving: a solid panel there would split the cavity and turn the cabinet into a\n    bandpass.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eJoinery\u003c\/h4\u003e\n\u003cp\u003eV-groove and dado throughout, 0.75 inch\n    material, double-layer 1.5 inch baffle. The walls seat into dados in both the lid and\n    the baffle rather than butting against them.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003ePower, wiring and warranty\u003c\/h3\u003e\n  \u003cp\u003eProdigy rate the NB2-12 at 400 W RMS. Terminal cup is side mounted, as on every Performance\n  Optimized cabinet. If you are running a dual 2 ohm driver, note that parallel wiring\n  presents 1 ohm, which many amplifiers are not stable into; series at 4 ohm is the safe\n  default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. The enclosure is built to order in\n  Tullahoma, Tennessee, and the driver is not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-cta\"\u003e\n  \u003cp\u003eCut, folded and finished for the Prodigy NB2-12. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from Prodigy's published\n  parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44762709033049,"sku":"PO 12-P DF NB2","price":339.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_DF_NB2_Front.jpg?v=1788319653"},{"product_id":"performance-optimized-down-fire-ported-10-enclosure-prodigy-nb2-10","title":"Prodigy NB2-10 Box: Ported 10\" Down Fire Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:54px 36px;text-align:center;color:#fff}.df-hero 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0}.df-enc-head{padding:12px 16px;font-size:.82em;font-weight:700;letter-spacing:.5px;text-transform:uppercase;color:#99abff;background:#001264}.df-enc-table{width:100%;border-collapse:collapse}.df-enc-table th{background:#0c0a09;color:#a8a29e;font-size:.78em;text-transform:uppercase;letter-spacing:.5px;padding:10px 14px;text-align:left;border-bottom:1px solid #44403c}.df-enc-table td{padding:12px 14px;border-bottom:1px solid #292524;color:#d6d3d1;font-size:.95em}.df-enc-table tr:last-child td{border-bottom:none}.df-opt td{background:#14532d;color:#fff;font-weight:600}.df-char{display:block;font-size:.78em;color:#a8a29e;font-weight:400;margin-top:2px}.df-opt .df-char{color:#86efac}.df-graph{background:#0c0a09;border:1px solid #44403c;border-radius:8px;padding:14px;margin:18px 0}.df-graph-title{font-size:.78em;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:#a8a29e;margin:0 0 10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Performance Optimized Down Fire 10\" Ported\u003c\/h2\u003e\n  \u003cp\u003eThe smallest cabinet in the ported line, at 14.5 inches deep\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.14 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 34.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 29.9 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Prodigy NB2-10\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.14\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e34.0\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e29.9\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e17.2\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 34.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eThis is the compact one. At 31 by 14.5 by 7.75 inches it is the smallest cabinet in the ported Down Fire line by a clear margin, and it holds 1.14 cubic feet net against a driver with only 21.1 litres of Vas. A small Vas means a driver that does not need much air to work, which is what makes a ported ten fit under a cargo floor at all.\u003c\/p\u003e\n  \u003cp\u003eTuned to 34.0 Hz the NB2-10 reaches an anechoic F3 of 29.9 Hz, which is deeper than either of the twelve-inch IDQ builds manage. A ten inch cone in a properly vented box outreaching a twelve in a bigger one is not a trick; it is what happens when the alignment matches the motor instead of the badge.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe port is the product\u003c\/h3\u003e\n  \u003cp\u003eA ported cabinet is easy to get wrong and the failure is audible. This one uses an\n  L-wrap slot port: a single folded wall running down the long side of the box past the\n  woofer ring, turning once through a faceted 90 degree bend, and opening through a\n  chamfered corner. One wall, one bend, 28.08 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is 2.75 inches wide by 6.25 tall, 17.2 square inches, and it exits\n  through a 22.1 square inch mouth. Air leaves at 13.6 metres per second at the tuning\n  frequency, against the 17.0 metre per second threshold where a slot port starts to\n  chuff. The bend is faceted rather than square because the inner corner of a 90 degree\n  turn is where flow separates, and a sharp corner there is what you hear.\u003c\/p\u003e\n  \u003cdiv class=\"df-highlight\"\u003e\n    \u003cp\u003e\u003cstrong\u003eThis enclosure ships dry.\u003c\/strong\u003e Polyfill goes in every sealed Proline X\n    cabinet we build. It does not go in this one. Damping material in a vented box\n    changes the effective volume the port is tuned against, which moves the tuning\n    frequency away from the 34.0 Hz the port length was cut for. Adding it does not make\n    a ported box sound like a bigger ported box; it makes it a mistuned one.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eRun a subsonic filter\u003c\/h3\u003e\n  \u003cp\u003eThis is not optional advice on a vented enclosure. Below tuning the port stops\n  loading the cone and excursion climbs without limit toward DC, so a 27 Hz high-pass at\n  24 dB per octave is part of the specification rather than a refinement of it. Set it\n  and the same cabinet takes substantially more power for the same cone travel. Leave it\n  out and the driver runs out of suspension on material you cannot hear.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, not an electrical\n  one: it is the power at which the cone reaches the end of its linear travel in this\n  box. What the voice coil can dissipate as heat is a separate ceiling set by Prodigy, not by\n  the cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eCut for this driver, not for a catalogue\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eMounting\u003c\/h4\u003e\n\u003cp\u003eCut to Prodigy's published 9.125 inch cutout with a\n    11.250 inch ring bonded under the baffle. The ring drops into a machined recess so it\n    self-centres, and it roughly doubles the glue area over a butt joint.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThreaded, not screwed\u003c\/h4\u003e\n\u003cp\u003eEight #8-32 hurricane nuts are\n    driven into the ring before it is bonded, so the driver mounts into steel rather than\n    into MDF and survives being unbolted more than once. The ring is cut with sixteen\n    positions so the driver can be clocked to whatever orientation the install needs;\n    eight are fitted.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eA windowed brace sits between the woofer cutout\n    and the port terminus, 2.71 inches clear of the cutout edge. The window is not weight\n    saving: a solid panel there would split the cavity and turn the cabinet into a\n    bandpass.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eJoinery\u003c\/h4\u003e\n\u003cp\u003eV-groove and dado throughout, 0.75 inch\n    material, double-layer 1.5 inch baffle. The walls seat into dados in both the lid and\n    the baffle rather than butting against them.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003ePower, wiring and warranty\u003c\/h3\u003e\n  \u003cp\u003eProdigy rate the NB2-10 at 350 W RMS. Terminal cup is side mounted, as on every Performance\n  Optimized cabinet. If you are running a dual 2 ohm driver, note that parallel wiring\n  presents 1 ohm, which many amplifiers are not stable into; series at 4 ohm is the safe\n  default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. The enclosure is built to order in\n  Tullahoma, Tennessee, and the driver is not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-cta\"\u003e\n  \u003cp\u003eCut, folded and finished for the Prodigy NB2-10. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from Prodigy's published\n  parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44762725417049,"sku":"PO 10-P DF NB2","price":309.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_10-P_DF_NB2_Front_fcedf564-3f02-4204-a605-e2a233484714.jpg?v=1788319563"},{"product_id":"performance-optimized-down-fire-ported-12-enclosure-image-dynamics-idq12-v4","title":"Image Dynamics IDQ12 V4 D4 Box: Ported 12\" Down Fire Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:54px 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10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Performance Optimized Down Fire 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003eThe widest port channel in the range, for the driver least obviously suited to one\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.48 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 35.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 37.7 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Image Dynamics IDQ12 V4\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.48\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e35.0\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e37.7\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e25.0\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 35.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe IDQ12 V4 D4 has an EBP of 40.2, which by the usual reading puts it in sealed territory. It is here anyway, and the reason is the port: 4.25 inches wide by 6.25 tall, 25.0 square inches of channel, the largest in the ported line. A high-Qts driver in a vented box needs the vent to do more of the work, and that means area rather than length.\u003c\/p\u003e\n  \u003cp\u003eQts 0.74 is high enough that a small or restrictive port would produce a peaky, underdamped result. Given 1.48 cubic feet and 25.0 square inches at 35.0 Hz it does not: the channel runs at 28 percent of its turbulence limit, the calmest in the ported line, and the mouth sees 9.2 metres per second where the threshold is 17. There is no condition in normal use where this port makes a sound.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe port is the product\u003c\/h3\u003e\n  \u003cp\u003eA ported cabinet is easy to get wrong and the failure is audible. This one uses an\n  L-wrap slot port: a single folded wall running down the long side of the box past the\n  woofer ring, turning once through a faceted 90 degree bend, and opening through a\n  chamfered corner. One wall, one bend, 29.01 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is 4.00 inches wide by 6.25 tall, 25.0 square inches, and it exits\n  through a 30.9 square inch mouth. Air leaves at 9.2 metres per second at the tuning\n  frequency, against the 17.0 metre per second threshold where a slot port starts to\n  chuff. The bend is faceted rather than square because the inner corner of a 90 degree\n  turn is where flow separates, and a sharp corner there is what you hear.\u003c\/p\u003e\n  \u003cdiv class=\"df-highlight\"\u003e\n    \u003cp\u003e\u003cstrong\u003eThis enclosure ships dry.\u003c\/strong\u003e Polyfill goes in every sealed Proline X\n    cabinet we build. It does not go in this one. Damping material in a vented box\n    changes the effective volume the port is tuned against, which moves the tuning\n    frequency away from the 35.0 Hz the port length was cut for. Adding it does not make\n    a ported box sound like a bigger ported box; it makes it a mistuned one.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eRun a subsonic filter\u003c\/h3\u003e\n  \u003cp\u003eThis is not optional advice on a vented enclosure. Below tuning the port stops\n  loading the cone and excursion climbs without limit toward DC, so a 28 Hz high-pass at\n  24 dB per octave is part of the specification rather than a refinement of it. Set it\n  and the same cabinet takes substantially more power for the same cone travel. Leave it\n  out and the driver runs out of suspension on material you cannot hear.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, not an electrical\n  one: it is the power at which the cone reaches the end of its linear travel in this\n  box. What the voice coil can dissipate as heat is a separate ceiling set by Image Dynamics, not by\n  the cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eCut for this driver, not for a catalogue\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eMounting\u003c\/h4\u003e\n\u003cp\u003eCut to Image Dynamics's published 10.866 inch cutout with a\n    13.500 inch ring bonded under the baffle. The ring drops into a machined recess so it\n    self-centres, and it roughly doubles the glue area over a butt joint.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThreaded, not screwed\u003c\/h4\u003e\n\u003cp\u003eEight #8-32 hurricane nuts are\n    driven into the ring before it is bonded, so the driver mounts into steel rather than\n    into MDF and survives being unbolted more than once. The ring is cut with sixteen\n    positions so the driver can be clocked to whatever orientation the install needs;\n    eight are fitted.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eA windowed brace sits between the woofer cutout\n    and the port terminus, 2.99 inches clear of the cutout edge. The window is not weight\n    saving: a solid panel there would split the cavity and turn the cabinet into a\n    bandpass.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eJoinery\u003c\/h4\u003e\n\u003cp\u003eV-groove and dado throughout, 0.75 inch\n    material, double-layer 1.5 inch baffle. The walls seat into dados in both the lid and\n    the baffle rather than butting against them.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003ePower, wiring and warranty\u003c\/h3\u003e\n  \u003cp\u003eImage Dynamics rate the IDQ12 V4 at 375 W RMS. Terminal cup is side mounted, as on every Performance\n  Optimized cabinet. If you are running a dual 2 ohm driver, note that parallel wiring\n  presents 1 ohm, which many amplifiers are not stable into; series at 4 ohm is the safe\n  default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. The enclosure is built to order in\n  Tullahoma, Tennessee, and the driver is not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-cta\"\u003e\n  \u003cp\u003eCut, folded and finished for the Image Dynamics IDQ12 V4. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from Image Dynamics's published\n  parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44762741997657,"sku":"PO 12-P DF IDQ","price":339.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_DF_IDQ_Front_0108c001-3960-4af5-8838-2ee5a872cd2b.jpg?v=1788319628"},{"product_id":"performance-optimized-down-fire-ported-10-enclosure-image-dynamics-idq10-v4","title":"Image Dynamics IDQ10 V4 Box: Ported 10\" Down Fire Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:54px 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10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Performance Optimized Down Fire 10\" Ported\u003c\/h2\u003e\n  \u003cp\u003e42 Hz Fs, 0.797 Qts, and the least loaded port we build\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.44 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 35.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 33.3 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Image Dynamics IDQ10 V4\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.44\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e35.5\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e33.3\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e25.0\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 35.5 Hz\u003c\/h3\u003e\n  \u003cp\u003eOn paper this is the least likely ported build in the range. The IDQ10 has the highest Fs in the set at 42.0 Hz and the highest Qts at 0.797, and an EBP of 42.3 that says sealed as plainly as a number can. What it also has is a very easy job to do: 250 watts through 24.3 litres of Vas asks almost nothing of a port.\u003c\/p\u003e\n  \u003cp\u003eThe result is the least loaded port we build: a 25.0 square inch channelrunning at 28 percent of its turbulence limit, the lowest figure in therange, with 12.2 metres per second at the mouth against a 17 threshold. There is no condition in normal use where this port makes a sound of its own. Tuned to 35.5 Hz it reaches an F3 of 33.3 Hz with 2.0 dB of in-car spread.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe port is the product\u003c\/h3\u003e\n  \u003cp\u003eA ported cabinet is easy to get wrong and the failure is audible. This one uses an\n  L-wrap slot port: a single folded wall running down the long side of the box past the\n  woofer ring, turning once through a faceted 90 degree bend, and opening through a\n  chamfered corner. One wall, one bend, 29.01 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is 4.00 inches wide by 6.25 tall, 25.0 square inches, and it exits\n  through a 22.1 square inch mouth. Air leaves at 12.2 metres per second at the tuning\n  frequency, against the 17.0 metre per second threshold where a slot port starts to\n  chuff. The bend is faceted rather than square because the inner corner of a 90 degree\n  turn is where flow separates, and a sharp corner there is what you hear.\u003c\/p\u003e\n  \u003cdiv class=\"df-highlight\"\u003e\n    \u003cp\u003e\u003cstrong\u003eThis enclosure ships dry.\u003c\/strong\u003e Polyfill goes in every sealed Proline X\n    cabinet we build. It does not go in this one. Damping material in a vented box\n    changes the effective volume the port is tuned against, which moves the tuning\n    frequency away from the 35.5 Hz the port length was cut for. Adding it does not make\n    a ported box sound like a bigger ported box; it makes it a mistuned one.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eRun a subsonic filter\u003c\/h3\u003e\n  \u003cp\u003eThis is not optional advice on a vented enclosure. Below tuning the port stops\n  loading the cone and excursion climbs without limit toward DC, so a 28 Hz high-pass at\n  24 dB per octave is part of the specification rather than a refinement of it. Set it\n  and the same cabinet takes substantially more power for the same cone travel. Leave it\n  out and the driver runs out of suspension on material you cannot hear.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, not an electrical\n  one: it is the power at which the cone reaches the end of its linear travel in this\n  box. What the voice coil can dissipate as heat is a separate ceiling set by Image Dynamics, not by\n  the cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eCut for this driver, not for a catalogue\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eMounting\u003c\/h4\u003e\n\u003cp\u003eCut to Image Dynamics's published 9.570 inch cutout with a\n    12.000 inch ring bonded under the baffle. The ring drops into a machined recess so it\n    self-centres, and it roughly doubles the glue area over a butt joint.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThreaded, not screwed\u003c\/h4\u003e\n\u003cp\u003eEight #8-32 hurricane nuts are\n    driven into the ring before it is bonded, so the driver mounts into steel rather than\n    into MDF and survives being unbolted more than once. The ring is cut with sixteen\n    positions so the driver can be clocked to whatever orientation the install needs;\n    eight are fitted.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eA windowed brace sits between the woofer cutout\n    and the port terminus, 3.39 inches clear of the cutout edge. The window is not weight\n    saving: a solid panel there would split the cavity and turn the cabinet into a\n    bandpass.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eJoinery\u003c\/h4\u003e\n\u003cp\u003eV-groove and dado throughout, 0.75 inch\n    material, double-layer 1.5 inch baffle. The walls seat into dados in both the lid and\n    the baffle rather than butting against them.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003ePower, wiring and warranty\u003c\/h3\u003e\n  \u003cp\u003eImage Dynamics rate the IDQ10 V4 at 250 W RMS. Terminal cup is side mounted, as on every Performance\n  Optimized cabinet. If you are running a dual 2 ohm driver, note that parallel wiring\n  presents 1 ohm, which many amplifiers are not stable into; series at 4 ohm is the safe\n  default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. The enclosure is built to order in\n  Tullahoma, Tennessee, and the driver is not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-cta\"\u003e\n  \u003cp\u003eCut, folded and finished for the Image Dynamics IDQ10 V4. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from Image Dynamics's published\n  parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44762766540889,"sku":"PO 10-P DF IDQ","price":309.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_10-P_DF_IDQ_Front_8daccf7c-bc21-4ff7-ad73-46e7a1e10dd9.jpg?v=1788319537"},{"product_id":"performance-optimized-down-fire-ported-12-enclosure-jl-audio-12tw3","title":"JL Audio 12TW3 Box: Ported 12\" Shallow Down Fire Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:54px 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solid #44403c;border-radius:8px;overflow:hidden;margin:18px 0}.df-enc-head{padding:12px 16px;font-size:.82em;font-weight:700;letter-spacing:.5px;text-transform:uppercase;color:#99abff;background:#001264}.df-enc-table{width:100%;border-collapse:collapse}.df-enc-table th{background:#0c0a09;color:#a8a29e;font-size:.78em;text-transform:uppercase;letter-spacing:.5px;padding:10px 14px;text-align:left;border-bottom:1px solid #44403c}.df-enc-table td{padding:12px 14px;border-bottom:1px solid #292524;color:#d6d3d1;font-size:.95em}.df-enc-table tr:last-child td{border-bottom:none}.df-opt td{background:#14532d;color:#fff;font-weight:600}.df-char{display:block;font-size:.78em;color:#a8a29e;font-weight:400;margin-top:2px}.df-opt .df-char{color:#86efac}.df-graph{background:#0c0a09;border:1px solid #44403c;border-radius:8px;padding:14px;margin:18px 0}.df-graph-title{font-size:.78em;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:#a8a29e;margin:0 0 10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Performance Optimized Down Fire 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003eA 3.5 inch shallow mount that still reaches 30 Hz\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.52 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 34.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 30.4 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the JL Audio 12TW3\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.52\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e34.5\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e30.4\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e23.4\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 34.5 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe 12TW3 is JL's thin-line twelve: 3.5 inches of mounting depth, built for installations where a conventional motor will not physically go. Shallow drivers usually give something up for that, and the usual sacrifice is low-end reach. This one does not make it. Fs 26.46 Hz and 48.7 litres of Vas is a full-depth driver's alignment set in a chassis that fits under a seat.\u003c\/p\u003e\n  \u003cp\u003eTuned to 34.5 Hz in 1.52 cubic feet it reaches an anechoic F3 of 30.5 Hz, the second deepest twelve in the ported line, behind only the WavtechthinPRO. For a driver 3.5 inches deep that is the entire point of the product.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe port is the product\u003c\/h3\u003e\n  \u003cp\u003eA ported cabinet is easy to get wrong and the failure is audible. This one uses an\n  L-wrap slot port: a single folded wall running down the long side of the box past the\n  woofer ring, turning once through a faceted 90 degree bend, and opening through a\n  chamfered corner. One wall, one bend, 27.17 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is 3.75 inches wide by 6.25 tall, 23.4 square inches, and it exits\n  through a 22.1 square inch mouth. Air leaves at 16.7 metres per second at the tuning\n  frequency, against the 17.0 metre per second threshold where a slot port starts to\n  chuff. The bend is faceted rather than square because the inner corner of a 90 degree\n  turn is where flow separates, and a sharp corner there is what you hear.\u003c\/p\u003e\n  \u003cdiv class=\"df-highlight\"\u003e\n    \u003cp\u003e\u003cstrong\u003eThis enclosure ships dry.\u003c\/strong\u003e Polyfill goes in every sealed Proline X\n    cabinet we build. It does not go in this one. Damping material in a vented box\n    changes the effective volume the port is tuned against, which moves the tuning\n    frequency away from the 34.5 Hz the port length was cut for. Adding it does not make\n    a ported box sound like a bigger ported box; it makes it a mistuned one.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eRun a subsonic filter\u003c\/h3\u003e\n  \u003cp\u003eThis is not optional advice on a vented enclosure. Below tuning the port stops\n  loading the cone and excursion climbs without limit toward DC, so a 27 Hz high-pass at\n  24 dB per octave is part of the specification rather than a refinement of it. Set it\n  and the same cabinet takes substantially more power for the same cone travel. Leave it\n  out and the driver runs out of suspension on material you cannot hear.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, not an electrical\n  one: it is the power at which the cone reaches the end of its linear travel in this\n  box. What the voice coil can dissipate as heat is a separate ceiling set by JL Audio, not by\n  the cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eCut for this driver, not for a catalogue\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eMounting\u003c\/h4\u003e\n\u003cp\u003eCut to JL Audio's published 11.625 inch cutout with a\n    14.125 inch ring bonded under the baffle. The ring drops into a machined recess so it\n    self-centres, and it roughly doubles the glue area over a butt joint.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThreaded, not screwed\u003c\/h4\u003e\n\u003cp\u003eEight #8-32 hurricane nuts are\n    driven into the ring before it is bonded, so the driver mounts into steel rather than\n    into MDF and survives being unbolted more than once. The ring is cut with sixteen\n    positions so the driver can be clocked to whatever orientation the install needs;\n    eight are fitted.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eA windowed brace sits between the woofer cutout\n    and the port terminus, 3.30 inches clear of the cutout edge. The window is not weight\n    saving: a solid panel there would split the cavity and turn the cabinet into a\n    bandpass.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eJoinery\u003c\/h4\u003e\n\u003cp\u003eV-groove and dado throughout, 0.75 inch\n    material, double-layer 1.5 inch baffle. The walls seat into dados in both the lid and\n    the baffle rather than butting against them.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003ePower, wiring and warranty\u003c\/h3\u003e\n  \u003cp\u003eJL Audio rate the 12TW3 at 400 W RMS. Terminal cup is side mounted, as on every Performance\n  Optimized cabinet. If you are running a dual 2 ohm driver, note that parallel wiring\n  presents 1 ohm, which many amplifiers are not stable into; series at 4 ohm is the safe\n  default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. The enclosure is built to order in\n  Tullahoma, Tennessee, and the driver is not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-cta\"\u003e\n  \u003cp\u003eCut, folded and finished for the JL Audio 12TW3. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from JL Audio's published\n  parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44762791149657,"sku":"PO 12-P DF TW3","price":339.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_DF_TW3_Front_449b4d2f-8017-4cf6-ba89-a9d53ea7ed39.jpg?v=1788319686"},{"product_id":"performance-optimized-down-fire-ported-12-enclosure-arc-audio-x2v2-12","title":"Arc Audio X2 V2 12 Box: Ported 12\" Down Fire Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:54px 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10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Performance Optimized Down Fire 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003e79 litres of Vas, the lowest tuning in the line and the quietest port onany twelve\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.45 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 31.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 33.8 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Arc Audio X2V2 12\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.45\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e31.0\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e33.8\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e18.8\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 31.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe X2V2 has 79.3 litres of Vas. The next largest driver in this range has 55.4, and most sit in the twenties and forties. A very high Vas means a very compliant suspension, and a compliant suspension is what lets a vented alignment be tuned low without the box fighting the motor. This one is tuned to 31.0 Hz, the lowest in the ported line.\u003c\/p\u003e\n  \u003cp\u003eIt produces 1.1 dB of in-car spread across 25 to 60 Hz, second flattest ofanything we build ported and behind only the ID10. The mouth moves 8.7metres per second against a 17 threshold, the quietest port on any twelvein the line. When the driver and the alignment agree, nothing has to be forced.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe port is the product\u003c\/h3\u003e\n  \u003cp\u003eA ported cabinet is easy to get wrong and the failure is audible. This one uses an\n  L-wrap slot port: a single folded wall running down the long side of the box past the\n  woofer ring, turning once through a faceted 90 degree bend, and opening through a\n  chamfered corner. One wall, one bend, 28.47 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is 3.00 inches wide by 6.25 tall, 18.8 square inches, and it exits\n  through a 26.5 square inch mouth. Air leaves at 8.7 metres per second at the tuning\n  frequency, against the 17.0 metre per second threshold where a slot port starts to\n  chuff. The bend is faceted rather than square because the inner corner of a 90 degree\n  turn is where flow separates, and a sharp corner there is what you hear.\u003c\/p\u003e\n  \u003cdiv class=\"df-highlight\"\u003e\n    \u003cp\u003e\u003cstrong\u003eThis enclosure ships dry.\u003c\/strong\u003e Polyfill goes in every sealed Proline X\n    cabinet we build. It does not go in this one. Damping material in a vented box\n    changes the effective volume the port is tuned against, which moves the tuning\n    frequency away from the 31.0 Hz the port length was cut for. Adding it does not make\n    a ported box sound like a bigger ported box; it makes it a mistuned one.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eRun a subsonic filter\u003c\/h3\u003e\n  \u003cp\u003eThis is not optional advice on a vented enclosure. Below tuning the port stops\n  loading the cone and excursion climbs without limit toward DC, so a 24 Hz high-pass at\n  24 dB per octave is part of the specification rather than a refinement of it. Set it\n  and the same cabinet takes substantially more power for the same cone travel. Leave it\n  out and the driver runs out of suspension on material you cannot hear.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, not an electrical\n  one: it is the power at which the cone reaches the end of its linear travel in this\n  box. What the voice coil can dissipate as heat is a separate ceiling set by Arc Audio, not by\n  the cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eCut for this driver, not for a catalogue\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eMounting\u003c\/h4\u003e\n\u003cp\u003eCut to Arc Audio's published 11.110 inch cutout with a\n    13.375 inch ring bonded under the baffle. The ring drops into a machined recess so it\n    self-centres, and it roughly doubles the glue area over a butt joint.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThreaded, not screwed\u003c\/h4\u003e\n\u003cp\u003eEight #8-32 hurricane nuts are\n    driven into the ring before it is bonded, so the driver mounts into steel rather than\n    into MDF and survives being unbolted more than once. The ring is cut with sixteen\n    positions so the driver can be clocked to whatever orientation the install needs;\n    eight are fitted.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eA windowed brace sits between the woofer cutout\n    and the port terminus, 2.74 inches clear of the cutout edge. The window is not weight\n    saving: a solid panel there would split the cavity and turn the cabinet into a\n    bandpass.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eJoinery\u003c\/h4\u003e\n\u003cp\u003eV-groove and dado throughout, 0.75 inch\n    material, double-layer 1.5 inch baffle. The walls seat into dados in both the lid and\n    the baffle rather than butting against them.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003ePower, wiring and warranty\u003c\/h3\u003e\n  \u003cp\u003eArc Audio rate the X2V2 12 at 250 W RMS. Terminal cup is side mounted, as on every Performance\n  Optimized cabinet. If you are running a dual 2 ohm driver, note that parallel wiring\n  presents 1 ohm, which many amplifiers are not stable into; series at 4 ohm is the safe\n  default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. The enclosure is built to order in\n  Tullahoma, Tennessee, and the driver is not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-cta\"\u003e\n  \u003cp\u003eCut, folded and finished for the Arc Audio X2V2 12. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from Arc Audio's published\n  parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44762807500889,"sku":"PO 12-P DF X2V2","price":339.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_DF_X2V2_Front_f809d18a-b41b-4e0f-a9ae-60e4d58418f2.jpg?v=1788319727"},{"product_id":"performance-optimized-down-fire-ported-12-enclosure-wavtech-thinpro12","title":"Wavtech thinPRO12 Box: Ported 12\" Shallow Down Fire Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:54px 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10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Performance Optimized Down Fire 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003e3 inches deep, 20 mm of travel, and the deepest reach of any twelve webuild\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.49 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 34.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 29.7 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Wavtech thinPRO12\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.49\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e34.5\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e29.7\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e23.4\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 34.5 Hz\u003c\/h3\u003e\n  \u003cp\u003eThree inches of mounting depth with 20 millimetres of one-way excursion is a combination that should not exist. The thinPRO12 is the shallowest driver in this range and has the most travel of any of them, and it takes 750 watts while doing it. Physically it is the easiest twelve here to fit and acoustically it is the hardest to build a port for.\u003c\/p\u003e\n  \u003cp\u003eTuned to 34.5 Hz in 1.49 cubic feet it reaches an anechoic F3 of 29.7 Hz,the deepest figure of any twelve in the ported line. Only four cabinetshere go lower and every one of them is an eight or a ten. That is what 42 litres of Vas and a 26 Hz free-air resonance buy you when the cabinet is sized to use them.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe port is the product\u003c\/h3\u003e\n  \u003cp\u003eA ported cabinet is easy to get wrong and the failure is audible. This one uses an\n  L-wrap slot port: a single folded wall running down the long side of the box past the\n  woofer ring, turning once through a faceted 90 degree bend, and opening through a\n  chamfered corner. One wall, one bend, 27.70 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is 3.75 inches wide by 6.25 tall, 23.4 square inches, and it exits\n  through a 30.9 square inch mouth. Air leaves at 16.9 metres per second at the tuning\n  frequency, against the 17.0 metre per second threshold where a slot port starts to\n  chuff. The bend is faceted rather than square because the inner corner of a 90 degree\n  turn is where flow separates, and a sharp corner there is what you hear.\u003c\/p\u003e\n  \u003cdiv class=\"df-highlight\"\u003e\n    \u003cp\u003e\u003cstrong\u003eThis enclosure ships dry.\u003c\/strong\u003e Polyfill goes in every sealed Proline X\n    cabinet we build. It does not go in this one. Damping material in a vented box\n    changes the effective volume the port is tuned against, which moves the tuning\n    frequency away from the 34.5 Hz the port length was cut for. Adding it does not make\n    a ported box sound like a bigger ported box; it makes it a mistuned one.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eRun a subsonic filter\u003c\/h3\u003e\n  \u003cp\u003eThis is not optional advice on a vented enclosure. Below tuning the port stops\n  loading the cone and excursion climbs without limit toward DC, so a 27 Hz high-pass at\n  24 dB per octave is part of the specification rather than a refinement of it. Set it\n  and the same cabinet takes substantially more power for the same cone travel. Leave it\n  out and the driver runs out of suspension on material you cannot hear.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, not an electrical\n  one: it is the power at which the cone reaches the end of its linear travel in this\n  box. What the voice coil can dissipate as heat is a separate ceiling set by Wavtech, not by\n  the cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eCut for this driver, not for a catalogue\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eMounting\u003c\/h4\u003e\n\u003cp\u003eCut to Wavtech's published 11.125 inch cutout with a\n    14.000 inch ring bonded under the baffle. The ring drops into a machined recess so it\n    self-centres, and it roughly doubles the glue area over a butt joint.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThreaded, not screwed\u003c\/h4\u003e\n\u003cp\u003eEight #8-32 hurricane nuts are\n    driven into the ring before it is bonded, so the driver mounts into steel rather than\n    into MDF and survives being unbolted more than once. The ring is cut with sixteen\n    positions so the driver can be clocked to whatever orientation the install needs;\n    eight are fitted.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eA windowed brace sits between the woofer cutout\n    and the port terminus, 3.29 inches clear of the cutout edge. The window is not weight\n    saving: a solid panel there would split the cavity and turn the cabinet into a\n    bandpass.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eJoinery\u003c\/h4\u003e\n\u003cp\u003eV-groove and dado throughout, 0.75 inch\n    material, double-layer 1.5 inch baffle. The walls seat into dados in both the lid and\n    the baffle rather than butting against them.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003ePower, wiring and warranty\u003c\/h3\u003e\n  \u003cp\u003eWavtech rate the thinPRO12 at 750 W RMS. Terminal cup is side mounted, as on every Performance\n  Optimized cabinet. If you are running a dual 2 ohm driver, note that parallel wiring\n  presents 1 ohm, which many amplifiers are not stable into; series at 4 ohm is the safe\n  default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. The enclosure is built to order in\n  Tullahoma, Tennessee, and the driver is not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-cta\"\u003e\n  \u003cp\u003eCut, folded and finished for the Wavtech thinPRO12. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from Wavtech's published\n  parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44762825392217,"sku":"PO 12-P DF THINPRO","price":339.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_DF_THINPRO_Front_33d7fcac-9970-457c-bdd0-be69594979e8.jpg?v=1788319670"},{"product_id":"performance-optimized-down-fire-ported-8-enclosure-image-dynamics-id8-v4","title":"Image Dynamics ID8 V4 Box: Ported 8\" Down Fire Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:54px 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solid #44403c;border-radius:8px;overflow:hidden;margin:18px 0}.df-enc-head{padding:12px 16px;font-size:.82em;font-weight:700;letter-spacing:.5px;text-transform:uppercase;color:#99abff;background:#001264}.df-enc-table{width:100%;border-collapse:collapse}.df-enc-table th{background:#0c0a09;color:#a8a29e;font-size:.78em;text-transform:uppercase;letter-spacing:.5px;padding:10px 14px;text-align:left;border-bottom:1px solid #44403c}.df-enc-table td{padding:12px 14px;border-bottom:1px solid #292524;color:#d6d3d1;font-size:.95em}.df-enc-table tr:last-child td{border-bottom:none}.df-opt td{background:#14532d;color:#fff;font-weight:600}.df-char{display:block;font-size:.78em;color:#a8a29e;font-weight:400;margin-top:2px}.df-opt .df-char{color:#86efac}.df-graph{background:#0c0a09;border:1px solid #44403c;border-radius:8px;padding:14px;margin:18px 0}.df-graph-title{font-size:.78em;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:#a8a29e;margin:0 0 10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Performance Optimized Down Fire 8\" Ported\u003c\/h2\u003e\n  \u003cp\u003eThe only eight in the ported range, and the smallest cabinet we build\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.05 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 34.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 30.2 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Image Dynamics ID8 V4\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.05\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e34.0\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e30.2\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e15.6\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 34.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eEight inch drivers are usually where a ported build stops making sense: too little cone area to move the air, too little compliance to tune low. The ID8 V4 is the exception because of one number. It resonates at 31 Hz free-air, which is lower than most twelves manage, and a motor that reaches that far down can be vented properly rather than as a gesture.\u003c\/p\u003e\n  \u003cp\u003eTuned to 34.0 Hz in 1.04 cubic feet it reaches an anechoic F3 of 30.2 Hz. That is deeper than three of the twelve inch cabinets in this same range, from a driver with less than half their cone area. It is also the smallest box we build ported, at 12.50 inches of external depth, which is the whole reason to want an eight in the first place.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe port is the product\u003c\/h3\u003e\n  \u003cp\u003eA ported cabinet is easy to get wrong and the failure is audible. This one uses an\n  L-wrap slot port: a single folded wall running down the long side of the box past the\n  woofer ring, turning once through a faceted 90 degree bend, and opening through a\n  chamfered corner. One wall, one bend, 27.82 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is 2.50 inches wide by 6.25 tall, 15.6 square inches, and it exits\n  through a 17.7 square inch mouth. Air leaves at 10.8 metres per second at the tuning\n  frequency, against the 17.0 metre per second threshold where a slot port starts to\n  chuff. The bend is faceted rather than square because the inner corner of a 90 degree\n  turn is where flow separates, and a sharp corner there is what you hear.\u003c\/p\u003e\n  \u003cdiv class=\"df-highlight\"\u003e\n    \u003cp\u003e\u003cstrong\u003eThis enclosure ships dry.\u003c\/strong\u003e Polyfill goes in every sealed Proline X\n    cabinet we build. It does not go in this one. Damping material in a vented box\n    changes the effective volume the port is tuned against, which moves the tuning\n    frequency away from the 34.0 Hz the port length was cut for. Adding it does not make\n    a ported box sound like a bigger ported box; it makes it a mistuned one.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eRun a subsonic filter\u003c\/h3\u003e\n  \u003cp\u003eThis is not optional advice on a vented enclosure. Below tuning the port stops\n  loading the cone and excursion climbs without limit toward DC, so a 27 Hz high-pass at\n  24 dB per octave is part of the specification rather than a refinement of it. Set it\n  and the same cabinet takes substantially more power for the same cone travel. Leave it\n  out and the driver runs out of suspension on material you cannot hear.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, not an electrical\n  one: it is the power at which the cone reaches the end of its linear travel in this\n  box. What the voice coil can dissipate as heat is a separate ceiling set by Image Dynamics, not by\n  the cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eCut for this driver, not for a catalogue\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eMounting\u003c\/h4\u003e\n\u003cp\u003eCut to Image Dynamics's published 7.087 inch cutout with a\n    9.250 inch ring bonded under the baffle. The ring drops into a machined recess so it\n    self-centres, and it roughly doubles the glue area over a butt joint.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThreaded, not screwed\u003c\/h4\u003e\n\u003cp\u003eEight #8-32 hurricane nuts are\n    driven into the ring before it is bonded, so the driver mounts into steel rather than\n    into MDF and survives being unbolted more than once. The ring is cut with sixteen\n    positions so the driver can be clocked to whatever orientation the install needs;\n    eight are fitted.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eA windowed brace sits between the woofer cutout\n    and the port terminus, 3.13 inches clear of the cutout edge. The window is not weight\n    saving: a solid panel there would split the cavity and turn the cabinet into a\n    bandpass.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eJoinery\u003c\/h4\u003e\n\u003cp\u003eV-groove and dado throughout, 0.75 inch\n    material, double-layer 1.5 inch baffle. The walls seat into dados in both the lid and\n    the baffle rather than butting against them.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003ePower, wiring and warranty\u003c\/h3\u003e\n  \u003cp\u003eImage Dynamics rate the ID8 V4 at 150 W RMS. Terminal cup is side mounted, as on every Performance\n  Optimized cabinet. If you are running a dual 2 ohm driver, note that parallel wiring\n  presents 1 ohm, which many amplifiers are not stable into; series at 4 ohm is the safe\n  default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. The enclosure is built to order in\n  Tullahoma, Tennessee, and the driver is not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-cta\"\u003e\n  \u003cp\u003eCut, folded and finished for the Image Dynamics ID8 V4. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from Image Dynamics's published\n  parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44769240088665,"sku":"PO 8-P DF IDv4","price":279.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_8-P_DF_IDv4_Front_ffe7e742-3d79-4930-9692-7632a3338f3c.jpg?v=1788319759"},{"product_id":"performance-optimized-down-fire-ported-10-enclosure-image-dynamics-id10-v4","title":"Image Dynamics ID10 V4 Box: Ported 10\" Down Fire Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:54px 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10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Performance Optimized Down Fire 10\" Ported\u003c\/h2\u003e\n  \u003cp\u003eThe flattest in-car response of any enclosure we build, ported or sealed\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.41 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 33.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 31.3 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Image Dynamics ID10 V4\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.41\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e33.0\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e31.3\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e21.9\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 33.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eThis is the flattest cabinet in the entire Proline X ported range. Across 25 to 60 Hz, with cabin gain applied, it holds 0.63 dB of variation. The next best is 1.5, and most of the range sits between 2 and 5. That is not a marketing number: it is the solver own objective, measured the same way on every enclosure we build.\u003c\/p\u003e\n  \u003cp\u003eIt happens because the driver and the cabin want the same thing. A 32 Hz motor with a 0.73 Qts and 37 litres of compliance, vented at 33.0 Hz into 1.41 cubic feet, produces a response whose natural rise sits exactly where a car own gain starts falling away. Nothing is being corrected or compensated. The two curves simply add up flat.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe port is the product\u003c\/h3\u003e\n  \u003cp\u003eA ported cabinet is easy to get wrong and the failure is audible. This one uses an\n  L-wrap slot port: a single folded wall running down the long side of the box past the\n  woofer ring, turning once through a faceted 90 degree bend, and opening through a\n  chamfered corner. One wall, one bend, 30.48 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is 3.50 inches wide by 6.25 tall, 21.9 square inches, and it exits\n  through a 26.5 square inch mouth. Air leaves at 9.0 metres per second at the tuning\n  frequency, against the 17.0 metre per second threshold where a slot port starts to\n  chuff. The bend is faceted rather than square because the inner corner of a 90 degree\n  turn is where flow separates, and a sharp corner there is what you hear.\u003c\/p\u003e\n  \u003cdiv class=\"df-highlight\"\u003e\n    \u003cp\u003e\u003cstrong\u003eThis enclosure ships dry.\u003c\/strong\u003e Polyfill goes in every sealed Proline X\n    cabinet we build. It does not go in this one. Damping material in a vented box\n    changes the effective volume the port is tuned against, which moves the tuning\n    frequency away from the 33.0 Hz the port length was cut for. Adding it does not make\n    a ported box sound like a bigger ported box; it makes it a mistuned one.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eRun a subsonic filter\u003c\/h3\u003e\n  \u003cp\u003eThis is not optional advice on a vented enclosure. Below tuning the port stops\n  loading the cone and excursion climbs without limit toward DC, so a 26 Hz high-pass at\n  24 dB per octave is part of the specification rather than a refinement of it. Set it\n  and the same cabinet takes substantially more power for the same cone travel. Leave it\n  out and the driver runs out of suspension on material you cannot hear.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, not an electrical\n  one: it is the power at which the cone reaches the end of its linear travel in this\n  box. What the voice coil can dissipate as heat is a separate ceiling set by Image Dynamics, not by\n  the cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eCut for this driver, not for a catalogue\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eMounting\u003c\/h4\u003e\n\u003cp\u003eCut to Image Dynamics's published 9.134 inch cutout with a\n    11.125 inch ring bonded under the baffle. The ring drops into a machined recess so it\n    self-centres, and it roughly doubles the glue area over a butt joint.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThreaded, not screwed\u003c\/h4\u003e\n\u003cp\u003eEight #8-32 hurricane nuts are\n    driven into the ring before it is bonded, so the driver mounts into steel rather than\n    into MDF and survives being unbolted more than once. The ring is cut with sixteen\n    positions so the driver can be clocked to whatever orientation the install needs;\n    eight are fitted.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eA windowed brace sits between the woofer cutout\n    and the port terminus, 2.68 inches clear of the cutout edge. The window is not weight\n    saving: a solid panel there would split the cavity and turn the cabinet into a\n    bandpass.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eJoinery\u003c\/h4\u003e\n\u003cp\u003eV-groove and dado throughout, 0.75 inch\n    material, double-layer 1.5 inch baffle. The walls seat into dados in both the lid and\n    the baffle rather than butting against them.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003ePower, wiring and warranty\u003c\/h3\u003e\n  \u003cp\u003eImage Dynamics rate the ID10 V4 at 250 W RMS. Terminal cup is side mounted, as on every Performance\n  Optimized cabinet. If you are running a dual 2 ohm driver, note that parallel wiring\n  presents 1 ohm, which many amplifiers are not stable into; series at 4 ohm is the safe\n  default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. The enclosure is built to order in\n  Tullahoma, Tennessee, and the driver is not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-cta\"\u003e\n  \u003cp\u003eCut, folded and finished for the Image Dynamics ID10 V4. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from Image Dynamics's published\n  parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44769264631897,"sku":"PO 10-P DF IDv4","price":309.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_10-P_DF_IDv4_Front_f354a489-347b-4e5d-be0a-7066ae06f4d7.jpg?v=1788319555"},{"product_id":"performance-optimized-down-fire-ported-12-enclosure-image-dynamics-id12-v4","title":"Image Dynamics ID12 V4 Box: Ported 12\" Down Fire Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:54px 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10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Performance Optimized Down Fire 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003eA 45 Hz motor, the highest resonance in the range, tuned to suit it\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.32 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 35.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 37.1 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Image Dynamics ID12 V4\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.32\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e35.5\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e37.1\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e21.9\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 35.5 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe ID12 V4 resonates at 45 Hz. That is the highest free-air resonance of any driver in this programme by nine hertz, and it dictates everything about the cabinet. There is no useful output to be had below where a driver has stopped moving, so this one is vented at 35.5 Hz and the box is sized to hold the passband flat rather than to chase an extension that was never available.\u003c\/p\u003e\n  \u003cp\u003eThe result is 1.77 dB of anechoic ripple, second flattest in the range, out of a driver most people would put in a sealed box without thinking about it. A 22.6 litre Vas is small and stiff, which is exactly the case where an oversized cabinet does harm rather than good. 1.37 cubic feet is what this motor wants.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe port is the product\u003c\/h3\u003e\n  \u003cp\u003eA ported cabinet is easy to get wrong and the failure is audible. This one uses an\n  L-wrap slot port: a single folded wall running down the long side of the box past the\n  woofer ring, turning once through a faceted 90 degree bend, and opening through a\n  chamfered corner. One wall, one bend, 27.87 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is 3.50 inches wide by 6.25 tall, 21.9 square inches, and it exits\n  through a 26.5 square inch mouth. Air leaves at 10.2 metres per second at the tuning\n  frequency, against the 17.0 metre per second threshold where a slot port starts to\n  chuff. The bend is faceted rather than square because the inner corner of a 90 degree\n  turn is where flow separates, and a sharp corner there is what you hear.\u003c\/p\u003e\n  \u003cdiv class=\"df-highlight\"\u003e\n    \u003cp\u003e\u003cstrong\u003eThis enclosure ships dry.\u003c\/strong\u003e Polyfill goes in every sealed Proline X\n    cabinet we build. It does not go in this one. Damping material in a vented box\n    changes the effective volume the port is tuned against, which moves the tuning\n    frequency away from the 35.5 Hz the port length was cut for. Adding it does not make\n    a ported box sound like a bigger ported box; it makes it a mistuned one.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eRun a subsonic filter\u003c\/h3\u003e\n  \u003cp\u003eThis is not optional advice on a vented enclosure. Below tuning the port stops\n  loading the cone and excursion climbs without limit toward DC, so a 28 Hz high-pass at\n  24 dB per octave is part of the specification rather than a refinement of it. Set it\n  and the same cabinet takes substantially more power for the same cone travel. Leave it\n  out and the driver runs out of suspension on material you cannot hear.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, not an electrical\n  one: it is the power at which the cone reaches the end of its linear travel in this\n  box. What the voice coil can dissipate as heat is a separate ceiling set by Image Dynamics, not by\n  the cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eCut for this driver, not for a catalogue\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eMounting\u003c\/h4\u003e\n\u003cp\u003eCut to Image Dynamics's published 11.024 inch cutout with a\n    13.250 inch ring bonded under the baffle. The ring drops into a machined recess so it\n    self-centres, and it roughly doubles the glue area over a butt joint.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThreaded, not screwed\u003c\/h4\u003e\n\u003cp\u003eEight #8-32 hurricane nuts are\n    driven into the ring before it is bonded, so the driver mounts into steel rather than\n    into MDF and survives being unbolted more than once. The ring is cut with sixteen\n    positions so the driver can be clocked to whatever orientation the install needs;\n    eight are fitted.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eA windowed brace sits between the woofer cutout\n    and the port terminus, 2.79 inches clear of the cutout edge. The window is not weight\n    saving: a solid panel there would split the cavity and turn the cabinet into a\n    bandpass.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eJoinery\u003c\/h4\u003e\n\u003cp\u003eV-groove and dado throughout, 0.75 inch\n    material, double-layer 1.5 inch baffle. The walls seat into dados in both the lid and\n    the baffle rather than butting against them.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003ePower, wiring and warranty\u003c\/h3\u003e\n  \u003cp\u003eImage Dynamics rate the ID12 V4 at 250 W RMS. Terminal cup is side mounted, as on every Performance\n  Optimized cabinet. If you are running a dual 2 ohm driver, note that parallel wiring\n  presents 1 ohm, which many amplifiers are not stable into; series at 4 ohm is the safe\n  default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. The enclosure is built to order in\n  Tullahoma, Tennessee, and the driver is not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-cta\"\u003e\n  \u003cp\u003eCut, folded and finished for the Image Dynamics ID12 V4. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from Image Dynamics's published\n  parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44769277345881,"sku":"PO 12-P DF IDv4","price":339.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_DF_IDv4_Front_79108dc4-736e-49e6-8181-f52b0c21c41f.jpg?v=1788319645"},{"product_id":"performance-optimized-down-fire-ported-8-enclosure-image-dynamics-idq8-v4","title":"Image Dynamics IDQ8 V4 Box: Ported 8\" Down Fire Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:54px 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solid #44403c;border-radius:8px;overflow:hidden;margin:18px 0}.df-enc-head{padding:12px 16px;font-size:.82em;font-weight:700;letter-spacing:.5px;text-transform:uppercase;color:#99abff;background:#001264}.df-enc-table{width:100%;border-collapse:collapse}.df-enc-table th{background:#0c0a09;color:#a8a29e;font-size:.78em;text-transform:uppercase;letter-spacing:.5px;padding:10px 14px;text-align:left;border-bottom:1px solid #44403c}.df-enc-table td{padding:12px 14px;border-bottom:1px solid #292524;color:#d6d3d1;font-size:.95em}.df-enc-table tr:last-child td{border-bottom:none}.df-opt td{background:#14532d;color:#fff;font-weight:600}.df-char{display:block;font-size:.78em;color:#a8a29e;font-weight:400;margin-top:2px}.df-opt .df-char{color:#86efac}.df-graph{background:#0c0a09;border:1px solid #44403c;border-radius:8px;padding:14px;margin:18px 0}.df-graph-title{font-size:.78em;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:#a8a29e;margin:0 0 10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Performance Optimized Down Fire 8\" Ported\u003c\/h2\u003e\n  \u003cp\u003e6.7 litres of Vas, and an F3 that undercuts every twelve in the range\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.00 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 33.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 28.3 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Image Dynamics IDQ8 V4\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.00\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e33.0\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e28.3\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e14.1\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 33.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe IDQ8 has 6.7 litres of Vas. Only its own shallow-mount sibling comes near that; every other driver in this programme is at least twice as compliant. A figure that small describes a suspension stiff enough that the cabinet barely participates in the alignment at all, and a driver like that is very hard to get wrong on airspace.\u003c\/p\u003e\n  \u003cp\u003eWhen the box has little say in the result there is very little for the box to get wrong, so the port can be sized for the airflow rather than as a compromise against volume. Tuned to 33.0 Hz it reaches an anechoic F3 of 28.2 Hz from a 214 square centimetre cone. That is deeper than every twelve inch cabinet in this range, and 1.09 dB of passband ripple is the second flattest curve we have measured, behind only the Prodigy NB3-12.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe port is the product\u003c\/h3\u003e\n  \u003cp\u003eA ported cabinet is easy to get wrong and the failure is audible. This one uses an\n  L-wrap slot port: a single folded wall running down the long side of the box past the\n  woofer ring, turning once through a faceted 90 degree bend, and opening through a\n  chamfered corner. One wall, one bend, 27.95 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is 2.25 inches wide by 6.25 tall, 14.1 square inches, and it exits\n  through a 17.7 square inch mouth. Air leaves at 10.6 metres per second at the tuning\n  frequency, against the 17.0 metre per second threshold where a slot port starts to\n  chuff. The bend is faceted rather than square because the inner corner of a 90 degree\n  turn is where flow separates, and a sharp corner there is what you hear.\u003c\/p\u003e\n  \u003cdiv class=\"df-highlight\"\u003e\n    \u003cp\u003e\u003cstrong\u003eThis enclosure ships dry.\u003c\/strong\u003e Polyfill goes in every sealed Proline X\n    cabinet we build. It does not go in this one. Damping material in a vented box\n    changes the effective volume the port is tuned against, which moves the tuning\n    frequency away from the 33.0 Hz the port length was cut for. Adding it does not make\n    a ported box sound like a bigger ported box; it makes it a mistuned one.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eRun a subsonic filter\u003c\/h3\u003e\n  \u003cp\u003eThis is not optional advice on a vented enclosure. Below tuning the port stops\n  loading the cone and excursion climbs without limit toward DC, so a 26 Hz high-pass at\n  24 dB per octave is part of the specification rather than a refinement of it. Set it\n  and the same cabinet takes substantially more power for the same cone travel. Leave it\n  out and the driver runs out of suspension on material you cannot hear.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, not an electrical\n  one: it is the power at which the cone reaches the end of its linear travel in this\n  box. What the voice coil can dissipate as heat is a separate ceiling set by Image Dynamics, not by\n  the cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eCut for this driver, not for a catalogue\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eMounting\u003c\/h4\u003e\n\u003cp\u003eCut to Image Dynamics's published 7.299 inch cutout with a\n    9.250 inch ring bonded under the baffle. The ring drops into a machined recess so it\n    self-centres, and it roughly doubles the glue area over a butt joint.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThreaded, not screwed\u003c\/h4\u003e\n\u003cp\u003eEight #8-32 hurricane nuts are\n    driven into the ring before it is bonded, so the driver mounts into steel rather than\n    into MDF and survives being unbolted more than once. The ring is cut with sixteen\n    positions so the driver can be clocked to whatever orientation the install needs;\n    eight are fitted.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eA windowed brace sits between the woofer cutout\n    and the port terminus, 2.74 inches clear of the cutout edge. The window is not weight\n    saving: a solid panel there would split the cavity and turn the cabinet into a\n    bandpass.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eJoinery\u003c\/h4\u003e\n\u003cp\u003eV-groove and dado throughout, 0.75 inch\n    material, double-layer 1.5 inch baffle. The walls seat into dados in both the lid and\n    the baffle rather than butting against them.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003ePower, wiring and warranty\u003c\/h3\u003e\n  \u003cp\u003eImage Dynamics rate the IDQ8 V4 at 125 W RMS. Terminal cup is side mounted, as on every Performance\n  Optimized cabinet. If you are running a dual 2 ohm driver, note that parallel wiring\n  presents 1 ohm, which many amplifiers are not stable into; series at 4 ohm is the safe\n  default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. The enclosure is built to order in\n  Tullahoma, Tennessee, and the driver is not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-cta\"\u003e\n  \u003cp\u003eCut, folded and finished for the Image Dynamics IDQ8 V4. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from Image Dynamics's published\n  parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44771780100185,"sku":"PO 8-P DF IDQ","price":279.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_8-P_DF_IDQ_Front_aa4a0fbd-3303-42d9-9179-4a3279cc9138.jpg?v=1788319743"},{"product_id":"performance-optimized-down-fire-ported-8-enclosure-image-dynamics-idqs8","title":"Image Dynamics IDQS8 Box: Ported 8\" Down Fire Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:54px 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10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Performance Optimized Down Fire 8\" Ported\u003c\/h2\u003e\n  \u003cp\u003eA 3.11 inch mounting depth and the deepest F3 in the ported line\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.02 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 32.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 27.9 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Image Dynamics IDQS8\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.02\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e32.5\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e27.9\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e14.1\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 32.5 Hz\u003c\/h3\u003e\n  \u003cp\u003eAt 3.11 inches of mounting depth the IDQS8 is the shallowest eight in this programme, and only the Wavtech thinPRO12 mounts shallower in any size. It exists for installations where a conventional eight will not physically fit, and this cabinet exists because a shallow driver still deserves a solved enclosure rather than a universal box.\u003c\/p\u003e\n  \u003cp\u003eTuned to 32.5 Hz in 1.02 cubic feet it reaches an anechoic F3 of 27.9 Hz, the deepest figure of any cabinet in this range. For a driver 3.11 inches deep with 7 mm of one-way travel that is a genuinely surprising number, and it comes from the alignment rather than from the motor: the box is doing work the driver cannot do on its own.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe port is the product\u003c\/h3\u003e\n  \u003cp\u003eA ported cabinet is easy to get wrong and the failure is audible. This one uses an\n  L-wrap slot port: a single folded wall running down the long side of the box past the\n  woofer ring, turning once through a faceted 90 degree bend, and opening through a\n  chamfered corner. One wall, one bend, 28.40 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is 2.25 inches wide by 6.25 tall, 14.1 square inches, and it exits\n  through a 22.1 square inch mouth. Air leaves at 7.6 metres per second at the tuning\n  frequency, against the 17.0 metre per second threshold where a slot port starts to\n  chuff. The bend is faceted rather than square because the inner corner of a 90 degree\n  turn is where flow separates, and a sharp corner there is what you hear.\u003c\/p\u003e\n  \u003cdiv class=\"df-highlight\"\u003e\n    \u003cp\u003e\u003cstrong\u003eThis enclosure ships dry.\u003c\/strong\u003e Polyfill goes in every sealed Proline X\n    cabinet we build. It does not go in this one. Damping material in a vented box\n    changes the effective volume the port is tuned against, which moves the tuning\n    frequency away from the 32.5 Hz the port length was cut for. Adding it does not make\n    a ported box sound like a bigger ported box; it makes it a mistuned one.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eRun a subsonic filter\u003c\/h3\u003e\n  \u003cp\u003eThis is not optional advice on a vented enclosure. Below tuning the port stops\n  loading the cone and excursion climbs without limit toward DC, so a 26 Hz high-pass at\n  24 dB per octave is part of the specification rather than a refinement of it. Set it\n  and the same cabinet takes substantially more power for the same cone travel. Leave it\n  out and the driver runs out of suspension on material you cannot hear.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, not an electrical\n  one: it is the power at which the cone reaches the end of its linear travel in this\n  box. What the voice coil can dissipate as heat is a separate ceiling set by Image Dynamics, not by\n  the cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eCut for this driver, not for a catalogue\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eMounting\u003c\/h4\u003e\n\u003cp\u003eCut to Image Dynamics's published 7.299 inch cutout with a\n    9.250 inch ring bonded under the baffle. The ring drops into a machined recess so it\n    self-centres, and it roughly doubles the glue area over a butt joint.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThreaded, not screwed\u003c\/h4\u003e\n\u003cp\u003eEight #8-32 hurricane nuts are\n    driven into the ring before it is bonded, so the driver mounts into steel rather than\n    into MDF and survives being unbolted more than once. The ring is cut with sixteen\n    positions so the driver can be clocked to whatever orientation the install needs;\n    eight are fitted.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eA windowed brace sits between the woofer cutout\n    and the port terminus, 2.52 inches clear of the cutout edge. The window is not weight\n    saving: a solid panel there would split the cavity and turn the cabinet into a\n    bandpass.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eJoinery\u003c\/h4\u003e\n\u003cp\u003eV-groove and dado throughout, 0.75 inch\n    material, double-layer 1.5 inch baffle. The walls seat into dados in both the lid and\n    the baffle rather than butting against them.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003ePower, wiring and warranty\u003c\/h3\u003e\n  \u003cp\u003eImage Dynamics rate the IDQS8 at 125 W RMS. Terminal cup is side mounted, as on every Performance\n  Optimized cabinet. If you are running a dual 2 ohm driver, note that parallel wiring\n  presents 1 ohm, which many amplifiers are not stable into; series at 4 ohm is the safe\n  default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. The enclosure is built to order in\n  Tullahoma, Tennessee, and the driver is not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-cta\"\u003e\n  \u003cp\u003eCut, folded and finished for the Image Dynamics IDQS8. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from Image Dynamics's published\n  parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44771784228953,"sku":"PO 8-P DF IDQS","price":279.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_8-P_DF_IDQS_Front_6fc34c42-6b6a-4100-844e-b38e29300347.jpg?v=1788319751"},{"product_id":"performance-optimized-down-fire-ported-10-enclosure-image-dynamics-idmax10-v4","title":"Image Dynamics IDMAX10 V4 Box: Ported 10\" Down Fire Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:54px 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10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Performance Optimized Down Fire 10\" Ported\u003c\/h2\u003e\n  \u003cp\u003e19 mm of travel and 500 watts, the most motor of any ten we build for\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.31 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 34.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 29.4 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Image Dynamics IDMAX10 V4\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.31\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e34.0\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e29.4\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e19.8\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 34.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe IDMAX10 carries 19 mm of one-way excursion and a 500 watt rating, which is more motor than any other ten inch driver in this programme by a wide margin, and more than most of the twelves. It resonates at 27 Hz, the lowest free-air figure of any ten here. That combination is what an IDMAX is for.\u003c\/p\u003e\n  \u003cp\u003eTuned to 34.0 Hz in 1.31 cubic feet it reaches an anechoic F3 of 29.4 Hz while holding 2.8 dB of in-car spread. The port is 19.8 square inches running at 43 percent of its turbulence limit with 15.3 metres per second at the mouth against a 17 threshold, and both of those are the tightest margins of any Image Dynamics cabinet in the line. That is the honest cost of feeding a driver with this much displacement.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe port is the product\u003c\/h3\u003e\n  \u003cp\u003eA ported cabinet is easy to get wrong and the failure is audible. This one uses an\n  L-wrap slot port: a single folded wall running down the long side of the box past the\n  woofer ring, turning once through a faceted 90 degree bend, and opening through a\n  chamfered corner. One wall, one bend, 27.69 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is 3.00 inches wide by 6.60 tall, 19.8 square inches, and it exits\n  through a 23.3 square inch mouth. Air leaves at 15.3 metres per second at the tuning\n  frequency, against the 17.0 metre per second threshold where a slot port starts to\n  chuff. The bend is faceted rather than square because the inner corner of a 90 degree\n  turn is where flow separates, and a sharp corner there is what you hear.\u003c\/p\u003e\n  \u003cdiv class=\"df-highlight\"\u003e\n    \u003cp\u003e\u003cstrong\u003eThis enclosure ships dry.\u003c\/strong\u003e Polyfill goes in every sealed Proline X\n    cabinet we build. It does not go in this one. Damping material in a vented box\n    changes the effective volume the port is tuned against, which moves the tuning\n    frequency away from the 34.0 Hz the port length was cut for. Adding it does not make\n    a ported box sound like a bigger ported box; it makes it a mistuned one.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eRun a subsonic filter\u003c\/h3\u003e\n  \u003cp\u003eThis is not optional advice on a vented enclosure. Below tuning the port stops\n  loading the cone and excursion climbs without limit toward DC, so a 27 Hz high-pass at\n  24 dB per octave is part of the specification rather than a refinement of it. Set it\n  and the same cabinet takes substantially more power for the same cone travel. Leave it\n  out and the driver runs out of suspension on material you cannot hear.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, not an electrical\n  one: it is the power at which the cone reaches the end of its linear travel in this\n  box. What the voice coil can dissipate as heat is a separate ceiling set by Image Dynamics, not by\n  the cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eCut for this driver, not for a catalogue\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eMounting\u003c\/h4\u003e\n\u003cp\u003eCut to Image Dynamics's published 9.646 inch cutout with a\n    11.875 inch ring bonded under the baffle. The ring drops into a machined recess so it\n    self-centres, and it roughly doubles the glue area over a butt joint.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThreaded, not screwed\u003c\/h4\u003e\n\u003cp\u003eEight #8-32 hurricane nuts are\n    driven into the ring before it is bonded, so the driver mounts into steel rather than\n    into MDF and survives being unbolted more than once. The ring is cut with sixteen\n    positions so the driver can be clocked to whatever orientation the install needs;\n    eight are fitted.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eA windowed brace sits between the woofer cutout\n    and the port terminus, 3.12 inches clear of the cutout edge. The window is not weight\n    saving: a solid panel there would split the cavity and turn the cabinet into a\n    bandpass.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eJoinery\u003c\/h4\u003e\n\u003cp\u003eV-groove and dado throughout, 0.75 inch\n    material, double-layer 1.5 inch baffle. The walls seat into dados in both the lid and\n    the baffle rather than butting against them.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003ePower, wiring and warranty\u003c\/h3\u003e\n  \u003cp\u003eImage Dynamics rate the IDMAX10 V4 at 500 W RMS. Terminal cup is side mounted, as on every Performance\n  Optimized cabinet. If you are running a dual 2 ohm driver, note that parallel wiring\n  presents 1 ohm, which many amplifiers are not stable into; series at 4 ohm is the safe\n  default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. The enclosure is built to order in\n  Tullahoma, Tennessee, and the driver is not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-cta\"\u003e\n  \u003cp\u003eCut, folded and finished for the Image Dynamics IDMAX10 V4. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from Image Dynamics's published\n  parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44771786915929,"sku":"PO 10-P DF IDMAX","price":309.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_10-P_DF_IDMAX_Front_134ee138-5ed7-42d3-b5b3-a4ea93199c69.jpg?v=1788319529"},{"product_id":"performance-optimized-down-fire-ported-10-enclosure-image-dynamics-idqs10","title":"Image Dynamics IDQS10 Box: Ported 10\" Down Fire Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:54px 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solid #44403c;border-radius:8px;overflow:hidden;margin:18px 0}.df-enc-head{padding:12px 16px;font-size:.82em;font-weight:700;letter-spacing:.5px;text-transform:uppercase;color:#99abff;background:#001264}.df-enc-table{width:100%;border-collapse:collapse}.df-enc-table th{background:#0c0a09;color:#a8a29e;font-size:.78em;text-transform:uppercase;letter-spacing:.5px;padding:10px 14px;text-align:left;border-bottom:1px solid #44403c}.df-enc-table td{padding:12px 14px;border-bottom:1px solid #292524;color:#d6d3d1;font-size:.95em}.df-enc-table tr:last-child td{border-bottom:none}.df-opt td{background:#14532d;color:#fff;font-weight:600}.df-char{display:block;font-size:.78em;color:#a8a29e;font-weight:400;margin-top:2px}.df-opt .df-char{color:#86efac}.df-graph{background:#0c0a09;border:1px solid #44403c;border-radius:8px;padding:14px;margin:18px 0}.df-graph-title{font-size:.78em;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:#a8a29e;margin:0 0 10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Performance Optimized Down Fire 10\" Ported\u003c\/h2\u003e\n  \u003cp\u003eA 3.5 inch shallow mount that still reaches under 30 Hz\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.43 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 34.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 29.7 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Image Dynamics IDQS10\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.43\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e34.5\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e29.7\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e23.4\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 34.5 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe IDQS10 mounts in 3.504 inches and reaches an anechoic F3 of 29.7 Hz in this cabinet. Shallow-mount drivers are usually sold on fitment alone, with the low end treated as the price you pay for it. That is not the trade here: this reaches deeper than every twelve inch Image Dynamics driver we build a ported box for.\u003c\/p\u003e\n  \u003cp\u003eIt works because the alignment is doing what the motor cannot. A 50 Hz free-air resonance and a 1.02 Qts describe a driver with no natural low end at all, and 1.43 cubic feet vented at 34.5 Hz builds one. The port is 23.4 square inches running at 33 percent of its turbulence limit, so nothing is being forced to get there.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe port is the product\u003c\/h3\u003e\n  \u003cp\u003eA ported cabinet is easy to get wrong and the failure is audible. This one uses an\n  L-wrap slot port: a single folded wall running down the long side of the box past the\n  woofer ring, turning once through a faceted 90 degree bend, and opening through a\n  chamfered corner. One wall, one bend, 29.14 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is 3.75 inches wide by 6.25 tall, 23.4 square inches, and it exits\n  through a 30.9 square inch mouth. Air leaves at 9.0 metres per second at the tuning\n  frequency, against the 17.0 metre per second threshold where a slot port starts to\n  chuff. The bend is faceted rather than square because the inner corner of a 90 degree\n  turn is where flow separates, and a sharp corner there is what you hear.\u003c\/p\u003e\n  \u003cdiv class=\"df-highlight\"\u003e\n    \u003cp\u003e\u003cstrong\u003eThis enclosure ships dry.\u003c\/strong\u003e Polyfill goes in every sealed Proline X\n    cabinet we build. It does not go in this one. Damping material in a vented box\n    changes the effective volume the port is tuned against, which moves the tuning\n    frequency away from the 34.5 Hz the port length was cut for. Adding it does not make\n    a ported box sound like a bigger ported box; it makes it a mistuned one.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eRun a subsonic filter\u003c\/h3\u003e\n  \u003cp\u003eThis is not optional advice on a vented enclosure. Below tuning the port stops\n  loading the cone and excursion climbs without limit toward DC, so a 27 Hz high-pass at\n  24 dB per octave is part of the specification rather than a refinement of it. Set it\n  and the same cabinet takes substantially more power for the same cone travel. Leave it\n  out and the driver runs out of suspension on material you cannot hear.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, not an electrical\n  one: it is the power at which the cone reaches the end of its linear travel in this\n  box. What the voice coil can dissipate as heat is a separate ceiling set by Image Dynamics, not by\n  the cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eCut for this driver, not for a catalogue\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eMounting\u003c\/h4\u003e\n\u003cp\u003eCut to Image Dynamics's published 9.567 inch cutout with a\n    12.000 inch ring bonded under the baffle. The ring drops into a machined recess so it\n    self-centres, and it roughly doubles the glue area over a butt joint.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThreaded, not screwed\u003c\/h4\u003e\n\u003cp\u003eEight #8-32 hurricane nuts are\n    driven into the ring before it is bonded, so the driver mounts into steel rather than\n    into MDF and survives being unbolted more than once. The ring is cut with sixteen\n    positions so the driver can be clocked to whatever orientation the install needs;\n    eight are fitted.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eA windowed brace sits between the woofer cutout\n    and the port terminus, 2.85 inches clear of the cutout edge. The window is not weight\n    saving: a solid panel there would split the cavity and turn the cabinet into a\n    bandpass.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eJoinery\u003c\/h4\u003e\n\u003cp\u003eV-groove and dado throughout, 0.75 inch\n    material, double-layer 1.5 inch baffle. The walls seat into dados in both the lid and\n    the baffle rather than butting against them.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003ePower, wiring and warranty\u003c\/h3\u003e\n  \u003cp\u003eImage Dynamics rate the IDQS10 at 200 W RMS. Terminal cup is side mounted, as on every Performance\n  Optimized cabinet. If you are running a dual 2 ohm driver, note that parallel wiring\n  presents 1 ohm, which many amplifiers are not stable into; series at 4 ohm is the safe\n  default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. The enclosure is built to order in\n  Tullahoma, Tennessee, and the driver is not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-cta\"\u003e\n  \u003cp\u003eCut, folded and finished for the Image Dynamics IDQS10. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from Image Dynamics's published\n  parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44771787243609,"sku":"PO 10-P DF IDQS","price":309.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_10-P_DF_IDQS_Front_ac45a679-e31c-4766-b810-15ab1e4ce8c2.jpg?v=1788319546"},{"product_id":"performance-optimized-down-fire-ported-12-enclosure-image-dynamics-idqs12","title":"Image Dynamics IDQS12 Box: Ported 12\" Down Fire Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:54px 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10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Performance Optimized Down Fire 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003eA shallow twelve with the widest port and the flattest in-car curve of the three\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.49 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 36.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 36.6 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Image Dynamics IDQS12\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.49\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e36.0\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e36.6\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e25.0\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 36.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe IDQS12 mounts in 3.504 inches, the same as its ten inch sibling, but carries 523 square centimetres of cone. More area moving the same 7.5 mm means more displacement out of a chassis that fits the same places, and it is the reason to choose this over the IDQS10 wherever the footprint allows it.\u003c\/p\u003e\n  \u003cp\u003eThe extra cone gets a wider channel to work through: 25.0 square inches, the largest port we cut and shared only with the two IDQ builds, running at 31 percent of its turbulence limit. That is the lowest loading of the three shallow cabinets. In the car it produces 2.6 dB of spread across 25 to 60 Hz, comfortably the flattest result the shallow series manages.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe port is the product\u003c\/h3\u003e\n  \u003cp\u003eA ported cabinet is easy to get wrong and the failure is audible. This one uses an\n  L-wrap slot port: a single folded wall running down the long side of the box past the\n  woofer ring, turning once through a faceted 90 degree bend, and opening through a\n  chamfered corner. One wall, one bend, 27.03 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is 4.00 inches wide by 6.25 tall, 25.0 square inches, and it exits\n  through a 22.1 square inch mouth. Air leaves at 13.5 metres per second at the tuning\n  frequency, against the 17.0 metre per second threshold where a slot port starts to\n  chuff. The bend is faceted rather than square because the inner corner of a 90 degree\n  turn is where flow separates, and a sharp corner there is what you hear.\u003c\/p\u003e\n  \u003cdiv class=\"df-highlight\"\u003e\n    \u003cp\u003e\u003cstrong\u003eThis enclosure ships dry.\u003c\/strong\u003e Polyfill goes in every sealed Proline X\n    cabinet we build. It does not go in this one. Damping material in a vented box\n    changes the effective volume the port is tuned against, which moves the tuning\n    frequency away from the 36.0 Hz the port length was cut for. Adding it does not make\n    a ported box sound like a bigger ported box; it makes it a mistuned one.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eRun a subsonic filter\u003c\/h3\u003e\n  \u003cp\u003eThis is not optional advice on a vented enclosure. Below tuning the port stops\n  loading the cone and excursion climbs without limit toward DC, so a 28 Hz high-pass at\n  24 dB per octave is part of the specification rather than a refinement of it. Set it\n  and the same cabinet takes substantially more power for the same cone travel. Leave it\n  out and the driver runs out of suspension on material you cannot hear.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, not an electrical\n  one: it is the power at which the cone reaches the end of its linear travel in this\n  box. What the voice coil can dissipate as heat is a separate ceiling set by Image Dynamics, not by\n  the cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eCut for this driver, not for a catalogue\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eMounting\u003c\/h4\u003e\n\u003cp\u003eCut to Image Dynamics's published 10.866 inch cutout with a\n    13.500 inch ring bonded under the baffle. The ring drops into a machined recess so it\n    self-centres, and it roughly doubles the glue area over a butt joint.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThreaded, not screwed\u003c\/h4\u003e\n\u003cp\u003eEight #8-32 hurricane nuts are\n    driven into the ring before it is bonded, so the driver mounts into steel rather than\n    into MDF and survives being unbolted more than once. The ring is cut with sixteen\n    positions so the driver can be clocked to whatever orientation the install needs;\n    eight are fitted.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eA windowed brace sits between the woofer cutout\n    and the port terminus, 3.48 inches clear of the cutout edge. The window is not weight\n    saving: a solid panel there would split the cavity and turn the cabinet into a\n    bandpass.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eJoinery\u003c\/h4\u003e\n\u003cp\u003eV-groove and dado throughout, 0.75 inch\n    material, double-layer 1.5 inch baffle. The walls seat into dados in both the lid and\n    the baffle rather than butting against them.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003ePower, wiring and warranty\u003c\/h3\u003e\n  \u003cp\u003eImage Dynamics rate the IDQS12 at 250 W RMS. Terminal cup is side mounted, as on every Performance\n  Optimized cabinet. If you are running a dual 2 ohm driver, note that parallel wiring\n  presents 1 ohm, which many amplifiers are not stable into; series at 4 ohm is the safe\n  default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. The enclosure is built to order in\n  Tullahoma, Tennessee, and the driver is not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-cta\"\u003e\n  \u003cp\u003eCut, folded and finished for the Image Dynamics IDQS12. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from Image Dynamics's published\n  parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44771793207385,"sku":"PO 12-P DF IDQS","price":339.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_DF_IDQS_Front_31c82e60-b1c0-44d7-895e-208410c541ae.jpg?v=1788319637"},{"product_id":"performance-optimized-down-fire-ported-8-enclosure-prodigy-nb2-8","title":"Prodigy NB2-8 Box: Ported 8\" Down Fire Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:54px 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10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Performance Optimized Down Fire 8\" Ported\u003c\/h2\u003e\n  \u003cp\u003eAn eight that reaches 27.8 Hz, deeper than anything else we build\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.08 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 33.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 27.8 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Prodigy NB2-8\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.08\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e33.0\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e27.8\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e15.6\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 33.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eThis cabinet reaches an anechoic F3 of 27.8 Hz. Nothing else in the ported range gets that low, in any size, including every twelve. It comes from an eight inch cone in 1.08 cubic feet, and it is the whole reason the product exists.\u003c\/p\u003e\n  \u003cp\u003eTwo things make it possible. The NB2-8 has 6.96 litres of Vas, so the suspension is stiff enough that the box barely participates in the alignment and the port can be sized for the job rather than as a compromise. And a 0.448 Qts is low enough to vent hard. Tuned to 33.0 Hz in a 13.50 inch cabinet, that combination puts the half-power point below every other cabinet in this line.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe port is the product\u003c\/h3\u003e\n  \u003cp\u003eA ported cabinet is easy to get wrong and the failure is audible. This one uses an\n  L-wrap slot port: a single folded wall running down the long side of the box past the\n  woofer ring, turning once through a faceted 90 degree bend, and opening through a\n  chamfered corner. One wall, one bend, 28.82 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is 2.50 inches wide by 6.25 tall, 15.6 square inches, and it exits\n  through a 22.1 square inch mouth. Air leaves at 13.3 metres per second at the tuning\n  frequency, against the 17.0 metre per second threshold where a slot port starts to\n  chuff. The bend is faceted rather than square because the inner corner of a 90 degree\n  turn is where flow separates, and a sharp corner there is what you hear.\u003c\/p\u003e\n  \u003cdiv class=\"df-highlight\"\u003e\n    \u003cp\u003e\u003cstrong\u003eThis enclosure ships dry.\u003c\/strong\u003e Polyfill goes in every sealed Proline X\n    cabinet we build. It does not go in this one. Damping material in a vented box\n    changes the effective volume the port is tuned against, which moves the tuning\n    frequency away from the 33.0 Hz the port length was cut for. Adding it does not make\n    a ported box sound like a bigger ported box; it makes it a mistuned one.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eRun a subsonic filter\u003c\/h3\u003e\n  \u003cp\u003eThis is not optional advice on a vented enclosure. Below tuning the port stops\n  loading the cone and excursion climbs without limit toward DC, so a 26 Hz high-pass at\n  24 dB per octave is part of the specification rather than a refinement of it. Set it\n  and the same cabinet takes substantially more power for the same cone travel. Leave it\n  out and the driver runs out of suspension on material you cannot hear.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, not an electrical\n  one: it is the power at which the cone reaches the end of its linear travel in this\n  box. What the voice coil can dissipate as heat is a separate ceiling set by Prodigy, not by\n  the cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eCut for this driver, not for a catalogue\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eMounting\u003c\/h4\u003e\n\u003cp\u003eCut to Prodigy's published 7.188 inch cutout with a\n    9.500 inch ring bonded under the baffle. The ring drops into a machined recess so it\n    self-centres, and it roughly doubles the glue area over a butt joint.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThreaded, not screwed\u003c\/h4\u003e\n\u003cp\u003eEight #8-32 hurricane nuts are\n    driven into the ring before it is bonded, so the driver mounts into steel rather than\n    into MDF and survives being unbolted more than once. The ring is cut with sixteen\n    positions so the driver can be clocked to whatever orientation the install needs;\n    eight are fitted.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eA windowed brace sits between the woofer cutout\n    and the port terminus, 2.83 inches clear of the cutout edge. The window is not weight\n    saving: a solid panel there would split the cavity and turn the cabinet into a\n    bandpass.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eJoinery\u003c\/h4\u003e\n\u003cp\u003eV-groove and dado throughout, 0.75 inch\n    material, double-layer 1.5 inch baffle. The walls seat into dados in both the lid and\n    the baffle rather than butting against them.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003ePower, wiring and warranty\u003c\/h3\u003e\n  \u003cp\u003eProdigy rate the NB2-8 at 300 W RMS. Terminal cup is side mounted, as on every Performance\n  Optimized cabinet. If you are running a dual 2 ohm driver, note that parallel wiring\n  presents 1 ohm, which many amplifiers are not stable into; series at 4 ohm is the safe\n  default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. The enclosure is built to order in\n  Tullahoma, Tennessee, and the driver is not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-cta\"\u003e\n  \u003cp\u003eCut, folded and finished for the Prodigy NB2-8. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from Prodigy's published\n  parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44774213025881,"sku":"PO 8-P DF NB2","price":279.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_8-P_DF_NB2_Front_3ec2d6c0-80ff-4284-ad8c-893c362f55c3.jpg?v=1788319767"},{"product_id":"performance-optimized-down-fire-ported-10-enclosure-prodigy-nb3-10","title":"Prodigy NB3-10 Box: Ported 10\" Shallow Down Fire Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:54px 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solid #44403c;border-radius:8px;overflow:hidden;margin:18px 0}.df-enc-head{padding:12px 16px;font-size:.82em;font-weight:700;letter-spacing:.5px;text-transform:uppercase;color:#99abff;background:#001264}.df-enc-table{width:100%;border-collapse:collapse}.df-enc-table th{background:#0c0a09;color:#a8a29e;font-size:.78em;text-transform:uppercase;letter-spacing:.5px;padding:10px 14px;text-align:left;border-bottom:1px solid #44403c}.df-enc-table td{padding:12px 14px;border-bottom:1px solid #292524;color:#d6d3d1;font-size:.95em}.df-enc-table tr:last-child td{border-bottom:none}.df-opt td{background:#14532d;color:#fff;font-weight:600}.df-char{display:block;font-size:.78em;color:#a8a29e;font-weight:400;margin-top:2px}.df-opt .df-char{color:#86efac}.df-graph{background:#0c0a09;border:1px solid #44403c;border-radius:8px;padding:14px;margin:18px 0}.df-graph-title{font-size:.78em;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:#a8a29e;margin:0 0 10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Performance Optimized Down Fire 10\" Ported\u003c\/h2\u003e\n  \u003cp\u003eThree inches of mounting depth, the shallowest ten in the programme\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.19 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 37.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 31.8 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Prodigy NB3-10\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.19\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e37.5\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e31.8\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e21.9\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 37.5 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe NB3-10 mounts in 3.00 inches. Nothing in this programme mounts shallower at any size, and no other ten comes close. If the floor-to-seat gap is what decides your build, this is the ten inch answer and the alternatives are twelves.\u003c\/p\u003e\n  \u003cp\u003eA 36.4 Hz free-air resonance with a 0.407 Qts is a stiff, well-damped motor that wants a vent, and 1.19 cubic feet tuned to 37.5 Hz is what it gets. That tuning is the highest in the range and it is deliberate: a motor that resonates at 36.4 has nothing to give below it, and tuning under Fs to chase a number would only put a hole in the middle of the passband.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe port is the product\u003c\/h3\u003e\n  \u003cp\u003eA ported cabinet is easy to get wrong and the failure is audible. This one uses an\n  L-wrap slot port: a single folded wall running down the long side of the box past the\n  woofer ring, turning once through a faceted 90 degree bend, and opening through a\n  chamfered corner. One wall, one bend, 27.83 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is 3.50 inches wide by 6.25 tall, 21.9 square inches, and it exits\n  through a 26.5 square inch mouth. Air leaves at 17.0 metres per second at the tuning\n  frequency, against the 17.0 metre per second threshold where a slot port starts to\n  chuff. The bend is faceted rather than square because the inner corner of a 90 degree\n  turn is where flow separates, and a sharp corner there is what you hear.\u003c\/p\u003e\n  \u003cdiv class=\"df-highlight\"\u003e\n    \u003cp\u003e\u003cstrong\u003eThis enclosure ships dry.\u003c\/strong\u003e Polyfill goes in every sealed Proline X\n    cabinet we build. It does not go in this one. Damping material in a vented box\n    changes the effective volume the port is tuned against, which moves the tuning\n    frequency away from the 37.5 Hz the port length was cut for. Adding it does not make\n    a ported box sound like a bigger ported box; it makes it a mistuned one.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eRun a subsonic filter\u003c\/h3\u003e\n  \u003cp\u003eThis is not optional advice on a vented enclosure. Below tuning the port stops\n  loading the cone and excursion climbs without limit toward DC, so a 30 Hz high-pass at\n  24 dB per octave is part of the specification rather than a refinement of it. Set it\n  and the same cabinet takes substantially more power for the same cone travel. Leave it\n  out and the driver runs out of suspension on material you cannot hear.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, not an electrical\n  one: it is the power at which the cone reaches the end of its linear travel in this\n  box. What the voice coil can dissipate as heat is a separate ceiling set by Prodigy, not by\n  the cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eCut for this driver, not for a catalogue\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eMounting\u003c\/h4\u003e\n\u003cp\u003eCut to Prodigy's published 9.188 inch cutout with a\n    11.375 inch ring bonded under the baffle. The ring drops into a machined recess so it\n    self-centres, and it roughly doubles the glue area over a butt joint.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThreaded, not screwed\u003c\/h4\u003e\n\u003cp\u003eEight #8-32 hurricane nuts are\n    driven into the ring before it is bonded, so the driver mounts into steel rather than\n    into MDF and survives being unbolted more than once. The ring is cut with sixteen\n    positions so the driver can be clocked to whatever orientation the install needs;\n    eight are fitted.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eA windowed brace sits between the woofer cutout\n    and the port terminus, 2.97 inches clear of the cutout edge. The window is not weight\n    saving: a solid panel there would split the cavity and turn the cabinet into a\n    bandpass.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eJoinery\u003c\/h4\u003e\n\u003cp\u003eV-groove and dado throughout, 0.75 inch\n    material, double-layer 1.5 inch baffle. The walls seat into dados in both the lid and\n    the baffle rather than butting against them.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003ePower, wiring and warranty\u003c\/h3\u003e\n  \u003cp\u003eProdigy rate the NB3-10 at 600 W RMS. Terminal cup is side mounted, as on every Performance\n  Optimized cabinet. If you are running a dual 2 ohm driver, note that parallel wiring\n  presents 1 ohm, which many amplifiers are not stable into; series at 4 ohm is the safe\n  default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. The enclosure is built to order in\n  Tullahoma, Tennessee, and the driver is not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-cta\"\u003e\n  \u003cp\u003eCut, folded and finished for the Prodigy NB3-10. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from Prodigy's published\n  parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44774213058649,"sku":"PO 10-P DF NB3","price":309.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_10-P_DF_NB3_Front_fb6633cc-9b2f-42e6-adac-ce015abfce4f.jpg?v=1788319571"},{"product_id":"performance-optimized-down-fire-ported-8-enclosure-jl-audio-8w1v3","title":"JL Audio 8W1v3 Box: Ported 8\" Down Fire Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:54px 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10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Performance Optimized Down Fire 8\" Ported\u003c\/h2\u003e\n  \u003cp\u003e0.96 dB of passband ripple, the flattest eight in the range\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.08 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 34.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 30.2 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the JL Audio 8W1v3\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.08\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e34.0\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e30.2\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e15.6\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 34.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eThis cabinet measures 0.96 dB of anechoic passband ripple. Only the Prodigy NB3-12 is flatter, and that is a twelve. For an eight inch driver in a vented box, which is the alignment most likely to produce a hump at tuning, that is an unusually clean result.\u003c\/p\u003e\n  \u003cp\u003eIt comes from a driver that is easy to load. The 8W1v3 has a 0.42 Qts and 19.3 litres of Vas, which is a well-damped motor with enough compliance that the cabinet does not have to fight it. Tuned to 34.0 Hz in 1.09 cubic feet the alignment falls out without being forced, and the port runs at 37 percent of its turbulence limit with 11.8 metres per second at the mouth.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe port is the product\u003c\/h3\u003e\n  \u003cp\u003eA ported cabinet is easy to get wrong and the failure is audible. This one uses an\n  L-wrap slot port: a single folded wall running down the long side of the box past the\n  woofer ring, turning once through a faceted 90 degree bend, and opening through a\n  chamfered corner. One wall, one bend, 26.76 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is 2.50 inches wide by 6.25 tall, 15.6 square inches, and it exits\n  through a 17.7 square inch mouth. Air leaves at 11.8 metres per second at the tuning\n  frequency, against the 17.0 metre per second threshold where a slot port starts to\n  chuff. The bend is faceted rather than square because the inner corner of a 90 degree\n  turn is where flow separates, and a sharp corner there is what you hear.\u003c\/p\u003e\n  \u003cdiv class=\"df-highlight\"\u003e\n    \u003cp\u003e\u003cstrong\u003eThis enclosure ships dry.\u003c\/strong\u003e Polyfill goes in every sealed Proline X\n    cabinet we build. It does not go in this one. Damping material in a vented box\n    changes the effective volume the port is tuned against, which moves the tuning\n    frequency away from the 34.0 Hz the port length was cut for. Adding it does not make\n    a ported box sound like a bigger ported box; it makes it a mistuned one.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eRun a subsonic filter\u003c\/h3\u003e\n  \u003cp\u003eThis is not optional advice on a vented enclosure. Below tuning the port stops\n  loading the cone and excursion climbs without limit toward DC, so a 27 Hz high-pass at\n  24 dB per octave is part of the specification rather than a refinement of it. Set it\n  and the same cabinet takes substantially more power for the same cone travel. Leave it\n  out and the driver runs out of suspension on material you cannot hear.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, not an electrical\n  one: it is the power at which the cone reaches the end of its linear travel in this\n  box. What the voice coil can dissipate as heat is a separate ceiling set by JL Audio, not by\n  the cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eCut for this driver, not for a catalogue\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eMounting\u003c\/h4\u003e\n\u003cp\u003eCut to JL Audio's published 7.087 inch cutout with a\n    9.500 inch ring bonded under the baffle. The ring drops into a machined recess so it\n    self-centres, and it roughly doubles the glue area over a butt joint.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThreaded, not screwed\u003c\/h4\u003e\n\u003cp\u003eEight #8-32 hurricane nuts are\n    driven into the ring before it is bonded, so the driver mounts into steel rather than\n    into MDF and survives being unbolted more than once. The ring is cut with sixteen\n    positions so the driver can be clocked to whatever orientation the install needs;\n    eight are fitted.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eA windowed brace sits between the woofer cutout\n    and the port terminus, 3.66 inches clear of the cutout edge. The window is not weight\n    saving: a solid panel there would split the cavity and turn the cabinet into a\n    bandpass.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eJoinery\u003c\/h4\u003e\n\u003cp\u003eV-groove and dado throughout, 0.75 inch\n    material, double-layer 1.5 inch baffle. The walls seat into dados in both the lid and\n    the baffle rather than butting against them.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003ePower, wiring and warranty\u003c\/h3\u003e\n  \u003cp\u003eJL Audio rate the 8W1v3 at 150 W RMS. Terminal cup is side mounted, as on every Performance\n  Optimized cabinet. If you are running a dual 2 ohm driver, note that parallel wiring\n  presents 1 ohm, which many amplifiers are not stable into; series at 4 ohm is the safe\n  default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. The enclosure is built to order in\n  Tullahoma, Tennessee, and the driver is not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-cta\"\u003e\n  \u003cp\u003eCut, folded and finished for the JL Audio 8W1v3. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from JL Audio's published\n  parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44774324043865,"sku":"PO 8-P DF W1V3","price":279.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_8-P_DF_W1V3_Front_f3b2fcec-2131-4b81-94dc-7c608e467608.jpg?v=1788319775"},{"product_id":"performance-optimized-down-fire-ported-8-enclosure-jl-audio-8w3v3","title":"JL Audio 8W3v3 Box: Ported 8\" Down Fire Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:54px 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14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Performance Optimized Down Fire 8\" Ported\u003c\/h2\u003e\n  \u003cp\u003eThe middle of JL's three eights, and the one that takes real power\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.07 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 34.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 29.2 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the JL Audio 8W3v3\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.07\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e34.0\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e29.2\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e15.6\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 34.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe 8W3v3 sits between the W1v3 and the W7AE in JL's eight inch range, and the gap is bigger than the model numbers suggest. It takes 250 watts against the W1v3's 150 and moves 10 mm one way against its 8. That is two thirds more power and a quarter more travel from a driver only 0.79 inches deeper.\u003c\/p\u003e\n  \u003cp\u003eA 0.47 Qts and 15.3 litres of Vas is a slightly stiffer, more controlled motor than its smaller sibling, and it wants a similar cabinet: 1.07 cubic feet vented at 34.0 Hz reaches an anechoic F3 of 29.2 Hz, a full hertz deeper than the W1v3 in the same footprint.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe port is the product\u003c\/h3\u003e\n  \u003cp\u003eA ported cabinet is easy to get wrong and the failure is audible. This one uses an\n  L-wrap slot port: a single folded wall running down the long side of the box past the\n  woofer ring, turning once through a faceted 90 degree bend, and opening through a\n  chamfered corner. One wall, one bend, 27.12 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is 2.50 inches wide by 6.25 tall, 15.6 square inches, and it exits\n  through a 17.7 square inch mouth. Air leaves at 15.5 metres per second at the tuning\n  frequency, against the 17.0 metre per second threshold where a slot port starts to\n  chuff. The bend is faceted rather than square because the inner corner of a 90 degree\n  turn is where flow separates, and a sharp corner there is what you hear.\u003c\/p\u003e\n  \u003cdiv class=\"df-highlight\"\u003e\n    \u003cp\u003e\u003cstrong\u003eThis enclosure ships dry.\u003c\/strong\u003e Polyfill goes in every sealed Proline X\n    cabinet we build. It does not go in this one. Damping material in a vented box\n    changes the effective volume the port is tuned against, which moves the tuning\n    frequency away from the 34.0 Hz the port length was cut for. Adding it does not make\n    a ported box sound like a bigger ported box; it makes it a mistuned one.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eRun a subsonic filter\u003c\/h3\u003e\n  \u003cp\u003eThis is not optional advice on a vented enclosure. Below tuning the port stops\n  loading the cone and excursion climbs without limit toward DC, so a 27 Hz high-pass at\n  24 dB per octave is part of the specification rather than a refinement of it. Set it\n  and the same cabinet takes substantially more power for the same cone travel. Leave it\n  out and the driver runs out of suspension on material you cannot hear.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, not an electrical\n  one: it is the power at which the cone reaches the end of its linear travel in this\n  box. What the voice coil can dissipate as heat is a separate ceiling set by JL Audio, not by\n  the cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eCut for this driver, not for a catalogue\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eMounting\u003c\/h4\u003e\n\u003cp\u003eCut to JL Audio's published 7.087 inch cutout with a\n    9.500 inch ring bonded under the baffle. The ring drops into a machined recess so it\n    self-centres, and it roughly doubles the glue area over a butt joint.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThreaded, not screwed\u003c\/h4\u003e\n\u003cp\u003eEight #8-32 hurricane nuts are\n    driven into the ring before it is bonded, so the driver mounts into steel rather than\n    into MDF and survives being unbolted more than once. The ring is cut with sixteen\n    positions so the driver can be clocked to whatever orientation the install needs;\n    eight are fitted.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eA windowed brace sits between the woofer cutout\n    and the port terminus, 3.48 inches clear of the cutout edge. The window is not weight\n    saving: a solid panel there would split the cavity and turn the cabinet into a\n    bandpass.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eJoinery\u003c\/h4\u003e\n\u003cp\u003eV-groove and dado throughout, 0.75 inch\n    material, double-layer 1.5 inch baffle. The walls seat into dados in both the lid and\n    the baffle rather than butting against them.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003ePower, wiring and warranty\u003c\/h3\u003e\n  \u003cp\u003eJL Audio rate the 8W3v3 at 250 W RMS. Terminal cup is side mounted, as on every Performance\n  Optimized cabinet. If you are running a dual 2 ohm driver, note that parallel wiring\n  presents 1 ohm, which many amplifiers are not stable into; series at 4 ohm is the safe\n  default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. The enclosure is built to order in\n  Tullahoma, Tennessee, and the driver is not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-cta\"\u003e\n  \u003cp\u003eCut, folded and finished for the JL Audio 8W3v3. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from JL Audio's published\n  parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44774324535385,"sku":"PO 8-P DF W3V3","price":279.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_8-P_DF_W3V3_Front_78d62e9d-dace-4789-8195-6ca1adb25d67.jpg?v=1788319784"},{"product_id":"performance-optimized-down-fire-ported-8-enclosure-jl-audio-8w7ae","title":"JL Audio 8W7AE Box: Ported 8\" Down Fire Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:54px 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10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Performance Optimized Down Fire 8\" Ported\u003c\/h2\u003e\n  \u003cp\u003e19 mm of travel and 500 watts, in an eight inch cabinet\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.18 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 34.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 28.7 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the JL Audio 8W7AE\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.18\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e34.0\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e28.7\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e18.8\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 34.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe 8W7AE carries 19 mm of one-way excursion and a 500 watt rating. Those are twelve inch numbers on an eight inch cone, and they belong to JL's flagship motor. No other eight in this programme is within reach of it, and few of the tens are either.\u003c\/p\u003e\n  \u003cp\u003eGiven 1.18 cubic feet vented at 34.0 Hz it reaches an anechoic F3 of 28.7 Hz and holds 4.0 dB of in-car spread, the flattest in-car result of JL's three eights. A 0.61 Qts with 17.4 litres of Vas is a heavily damped motor, and heavy damping is what lets an eight this powerful stay controlled in a vented box rather than becoming a one-note one.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe port is the product\u003c\/h3\u003e\n  \u003cp\u003eA ported cabinet is easy to get wrong and the failure is audible. This one uses an\n  L-wrap slot port: a single folded wall running down the long side of the box past the\n  woofer ring, turning once through a faceted 90 degree bend, and opening through a\n  chamfered corner. One wall, one bend, 29.59 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is 3.00 inches wide by 6.25 tall, 18.8 square inches, and it exits\n  through a 26.5 square inch mouth. Air leaves at 14.6 metres per second at the tuning\n  frequency, against the 17.0 metre per second threshold where a slot port starts to\n  chuff. The bend is faceted rather than square because the inner corner of a 90 degree\n  turn is where flow separates, and a sharp corner there is what you hear.\u003c\/p\u003e\n  \u003cdiv class=\"df-highlight\"\u003e\n    \u003cp\u003e\u003cstrong\u003eThis enclosure ships dry.\u003c\/strong\u003e Polyfill goes in every sealed Proline X\n    cabinet we build. It does not go in this one. Damping material in a vented box\n    changes the effective volume the port is tuned against, which moves the tuning\n    frequency away from the 34.0 Hz the port length was cut for. Adding it does not make\n    a ported box sound like a bigger ported box; it makes it a mistuned one.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eRun a subsonic filter\u003c\/h3\u003e\n  \u003cp\u003eThis is not optional advice on a vented enclosure. Below tuning the port stops\n  loading the cone and excursion climbs without limit toward DC, so a 27 Hz high-pass at\n  24 dB per octave is part of the specification rather than a refinement of it. Set it\n  and the same cabinet takes substantially more power for the same cone travel. Leave it\n  out and the driver runs out of suspension on material you cannot hear.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, not an electrical\n  one: it is the power at which the cone reaches the end of its linear travel in this\n  box. What the voice coil can dissipate as heat is a separate ceiling set by JL Audio, not by\n  the cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eCut for this driver, not for a catalogue\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eMounting\u003c\/h4\u003e\n\u003cp\u003eCut to JL Audio's published 6.929 inch cutout with a\n    9.500 inch ring bonded under the baffle. The ring drops into a machined recess so it\n    self-centres, and it roughly doubles the glue area over a butt joint.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThreaded, not screwed\u003c\/h4\u003e\n\u003cp\u003eEight #8-32 hurricane nuts are\n    driven into the ring before it is bonded, so the driver mounts into steel rather than\n    into MDF and survives being unbolted more than once. The ring is cut with sixteen\n    positions so the driver can be clocked to whatever orientation the install needs;\n    eight are fitted.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eA windowed brace sits between the woofer cutout\n    and the port terminus, 3.02 inches clear of the cutout edge. The window is not weight\n    saving: a solid panel there would split the cavity and turn the cabinet into a\n    bandpass.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eJoinery\u003c\/h4\u003e\n\u003cp\u003eV-groove and dado throughout, 0.75 inch\n    material, double-layer 1.5 inch baffle. The walls seat into dados in both the lid and\n    the baffle rather than butting against them.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003ePower, wiring and warranty\u003c\/h3\u003e\n  \u003cp\u003eJL Audio rate the 8W7AE at 500 W RMS. Terminal cup is side mounted, as on every Performance\n  Optimized cabinet. The 8W7AE-3 has a single 3 ohm voice coil, so one driver presents 3 ohms to a mono amplifier; confirm your amplifier makes its power at that load.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. The enclosure is built to order in\n  Tullahoma, Tennessee, and the driver is not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-cta\"\u003e\n  \u003cp\u003eCut, folded and finished for the JL Audio 8W7AE. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from JL Audio's published\n  parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44774325125209,"sku":"PO 8-P DF W7AE","price":279.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_8-P_DF_W7AE_Front_84c4180d-e2e8-4fff-9609-3b15ec257141.jpg?v=1788319792"},{"product_id":"performance-optimized-down-fire-ported-10-enclosure-jl-audio-10tw1","title":"JL Audio 10TW1 Box: Ported 10\" Down Fire Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:54px 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10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Performance Optimized Down Fire 10\" Ported\u003c\/h2\u003e\n  \u003cp\u003eA 4.37 inch thin-line ten for installs that will not take a W-series\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.25 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 34.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 28.3 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the JL Audio 10TW1\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.25\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e34.0\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e28.3\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e18.8\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 34.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe 10TW1 is JL's shallow ten, 4.37 inches deep against the W3v3's 5.95 and the W6v3's 6.89. It exists for the same reason every thin-line driver does: the space decided the driver before the specification did.\u003c\/p\u003e\n  \u003cp\u003eA 41.5 Hz free-air resonance with only 10.3 litres of Vas is a stiff, small compliance motor, and the alignment is built around that rather than against it. 1.25 cubic feet vented at 34.0 Hz reaches an anechoic F3 of 28.3 Hz, which is the deepest of any JL ten in this range and not what the driver's own numbers suggest.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe port is the product\u003c\/h3\u003e\n  \u003cp\u003eA ported cabinet is easy to get wrong and the failure is audible. This one uses an\n  L-wrap slot port: a single folded wall running down the long side of the box past the\n  woofer ring, turning once through a faceted 90 degree bend, and opening through a\n  chamfered corner. One wall, one bend, 27.65 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is 3.00 inches wide by 6.25 tall, 18.8 square inches, and it exits\n  through a 22.1 square inch mouth. Air leaves at 14.9 metres per second at the tuning\n  frequency, against the 17.0 metre per second threshold where a slot port starts to\n  chuff. The bend is faceted rather than square because the inner corner of a 90 degree\n  turn is where flow separates, and a sharp corner there is what you hear.\u003c\/p\u003e\n  \u003cdiv class=\"df-highlight\"\u003e\n    \u003cp\u003e\u003cstrong\u003eThis enclosure ships dry.\u003c\/strong\u003e Polyfill goes in every sealed Proline X\n    cabinet we build. It does not go in this one. Damping material in a vented box\n    changes the effective volume the port is tuned against, which moves the tuning\n    frequency away from the 34.0 Hz the port length was cut for. Adding it does not make\n    a ported box sound like a bigger ported box; it makes it a mistuned one.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eRun a subsonic filter\u003c\/h3\u003e\n  \u003cp\u003eThis is not optional advice on a vented enclosure. Below tuning the port stops\n  loading the cone and excursion climbs without limit toward DC, so a 27 Hz high-pass at\n  24 dB per octave is part of the specification rather than a refinement of it. Set it\n  and the same cabinet takes substantially more power for the same cone travel. Leave it\n  out and the driver runs out of suspension on material you cannot hear.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, not an electrical\n  one: it is the power at which the cone reaches the end of its linear travel in this\n  box. What the voice coil can dissipate as heat is a separate ceiling set by JL Audio, not by\n  the cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eCut for this driver, not for a catalogue\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eMounting\u003c\/h4\u003e\n\u003cp\u003eCut to JL Audio's published 9.055 inch cutout with a\n    11.375 inch ring bonded under the baffle. The ring drops into a machined recess so it\n    self-centres, and it roughly doubles the glue area over a butt joint.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThreaded, not screwed\u003c\/h4\u003e\n\u003cp\u003eEight #8-32 hurricane nuts are\n    driven into the ring before it is bonded, so the driver mounts into steel rather than\n    into MDF and survives being unbolted more than once. The ring is cut with sixteen\n    positions so the driver can be clocked to whatever orientation the install needs;\n    eight are fitted.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eA windowed brace sits between the woofer cutout\n    and the port terminus, 3.18 inches clear of the cutout edge. The window is not weight\n    saving: a solid panel there would split the cavity and turn the cabinet into a\n    bandpass.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eJoinery\u003c\/h4\u003e\n\u003cp\u003eV-groove and dado throughout, 0.75 inch\n    material, double-layer 1.5 inch baffle. The walls seat into dados in both the lid and\n    the baffle rather than butting against them.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003ePower, wiring and warranty\u003c\/h3\u003e\n  \u003cp\u003eJL Audio rate the 10TW1 at 300 W RMS. Terminal cup is side mounted, as on every Performance\n  Optimized cabinet. If you are running a dual 2 ohm driver, note that parallel wiring\n  presents 1 ohm, which many amplifiers are not stable into; series at 4 ohm is the safe\n  default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. The enclosure is built to order in\n  Tullahoma, Tennessee, and the driver is not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-cta\"\u003e\n  \u003cp\u003eCut, folded and finished for the JL Audio 10TW1. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from JL Audio's published\n  parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44774325682265,"sku":"PO 10-P DF TW1","price":309.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_10-P_DF_TW1_Front_e0ed5b06-ce82-4bae-87a6-bbea211e90b9.jpg?v=1788319579"},{"product_id":"performance-optimized-down-fire-ported-10-enclosure-jl-audio-10tw3","title":"JL Audio 10TW3 Box: Ported 10\" Shallow Down Fire Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:54px 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14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Performance Optimized Down Fire 10\" Ported\u003c\/h2\u003e\n  \u003cp\u003e3.27 inches deep with 15.2 mm of travel behind it\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.28 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 35.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 28.8 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the JL Audio 10TW3\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.28\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e35.0\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e28.8\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e20.3\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 35.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe 10TW3 mounts in 3.27 inches and still moves 15.2 mm one way on 400 watts. Shallow drivers almost always trade travel for depth; this one largely does not, and that is the reason to choose it over the thinner-sounding TW1.\u003c\/p\u003e\n  \u003cp\u003e1.28 cubic feet vented at 35.0 Hz reaches an anechoic F3 of 28.8 Hz. A 32.3 Hz resonance with 19.8 litres of Vas is a considerably more capable starting point than the TW1's 41.5 Hz and 10.3 litres, and the extra cone area helps too: 365 square centimetres against the TW1's 268.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe port is the product\u003c\/h3\u003e\n  \u003cp\u003eA ported cabinet is easy to get wrong and the failure is audible. This one uses an\n  L-wrap slot port: a single folded wall running down the long side of the box past the\n  woofer ring, turning once through a faceted 90 degree bend, and opening through a\n  chamfered corner. One wall, one bend, 27.58 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is 3.25 inches wide by 6.25 tall, 20.3 square inches, and it exits\n  through a 22.1 square inch mouth. Air leaves at 16.5 metres per second at the tuning\n  frequency, against the 17.0 metre per second threshold where a slot port starts to\n  chuff. The bend is faceted rather than square because the inner corner of a 90 degree\n  turn is where flow separates, and a sharp corner there is what you hear.\u003c\/p\u003e\n  \u003cdiv class=\"df-highlight\"\u003e\n    \u003cp\u003e\u003cstrong\u003eThis enclosure ships dry.\u003c\/strong\u003e Polyfill goes in every sealed Proline X\n    cabinet we build. It does not go in this one. Damping material in a vented box\n    changes the effective volume the port is tuned against, which moves the tuning\n    frequency away from the 35.0 Hz the port length was cut for. Adding it does not make\n    a ported box sound like a bigger ported box; it makes it a mistuned one.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eRun a subsonic filter\u003c\/h3\u003e\n  \u003cp\u003eThis is not optional advice on a vented enclosure. Below tuning the port stops\n  loading the cone and excursion climbs without limit toward DC, so a 28 Hz high-pass at\n  24 dB per octave is part of the specification rather than a refinement of it. Set it\n  and the same cabinet takes substantially more power for the same cone travel. Leave it\n  out and the driver runs out of suspension on material you cannot hear.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, not an electrical\n  one: it is the power at which the cone reaches the end of its linear travel in this\n  box. What the voice coil can dissipate as heat is a separate ceiling set by JL Audio, not by\n  the cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eCut for this driver, not for a catalogue\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eMounting\u003c\/h4\u003e\n\u003cp\u003eCut to JL Audio's published 9.606 inch cutout with a\n    11.500 inch ring bonded under the baffle. The ring drops into a machined recess so it\n    self-centres, and it roughly doubles the glue area over a butt joint.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThreaded, not screwed\u003c\/h4\u003e\n\u003cp\u003eEight #8-32 hurricane nuts are\n    driven into the ring before it is bonded, so the driver mounts into steel rather than\n    into MDF and survives being unbolted more than once. The ring is cut with sixteen\n    positions so the driver can be clocked to whatever orientation the install needs;\n    eight are fitted.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eA windowed brace sits between the woofer cutout\n    and the port terminus, 2.91 inches clear of the cutout edge. The window is not weight\n    saving: a solid panel there would split the cavity and turn the cabinet into a\n    bandpass.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eJoinery\u003c\/h4\u003e\n\u003cp\u003eV-groove and dado throughout, 0.75 inch\n    material, double-layer 1.5 inch baffle. The walls seat into dados in both the lid and\n    the baffle rather than butting against them.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003ePower, wiring and warranty\u003c\/h3\u003e\n  \u003cp\u003eJL Audio rate the 10TW3 at 400 W RMS. Terminal cup is side mounted, as on every Performance\n  Optimized cabinet. If you are running a dual 2 ohm driver, note that parallel wiring\n  presents 1 ohm, which many amplifiers are not stable into; series at 4 ohm is the safe\n  default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. The enclosure is built to order in\n  Tullahoma, Tennessee, and the driver is not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-cta\"\u003e\n  \u003cp\u003eCut, folded and finished for the JL Audio 10TW3. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from JL Audio's published\n  parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44774326108249,"sku":"PO 10-P DF TW3","price":309.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_10-P_DF_TW3_Front_df43c8ed-dd9f-46ea-b4ea-bd8511a0f427.jpg?v=1788319587"},{"product_id":"performance-optimized-down-fire-ported-10-enclosure-jl-audio-10w0v3","title":"JL Audio 10W0v3 Box: Ported 10\" Down Fire Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:54px 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solid #44403c;border-radius:8px;overflow:hidden;margin:18px 0}.df-enc-head{padding:12px 16px;font-size:.82em;font-weight:700;letter-spacing:.5px;text-transform:uppercase;color:#99abff;background:#001264}.df-enc-table{width:100%;border-collapse:collapse}.df-enc-table th{background:#0c0a09;color:#a8a29e;font-size:.78em;text-transform:uppercase;letter-spacing:.5px;padding:10px 14px;text-align:left;border-bottom:1px solid #44403c}.df-enc-table td{padding:12px 14px;border-bottom:1px solid #292524;color:#d6d3d1;font-size:.95em}.df-enc-table tr:last-child td{border-bottom:none}.df-opt td{background:#14532d;color:#fff;font-weight:600}.df-char{display:block;font-size:.78em;color:#a8a29e;font-weight:400;margin-top:2px}.df-opt .df-char{color:#86efac}.df-graph{background:#0c0a09;border:1px solid #44403c;border-radius:8px;padding:14px;margin:18px 0}.df-graph-title{font-size:.78em;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:#a8a29e;margin:0 0 10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Performance Optimized Down Fire 10\" Ported\u003c\/h2\u003e\n  \u003cp\u003e1.74 dB of in-car spread, the flattest ten JL makes here\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.26 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 33.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 30.7 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the JL Audio 10W0v3\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.26\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e33.5\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e30.7\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e18.8\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 33.5 Hz\u003c\/h3\u003e\n  \u003cp\u003eOf the six JL tens this cabinet is built for, this one produces the flattest in-car curve: 1.74 dB of spread across 25 to 60 Hz. That is a better result than the W3v3, the W6v3 and both thin-line tens, from JL's least expensive ten inch driver.\u003c\/p\u003e\n  \u003cp\u003eA 32.1 Hz free-air resonance with 31.0 litres of Vas and a 0.60 Qts is a well-behaved combination that neither needs a large box nor objects to a small one. 1.26 cubic feet vented at 33.5 Hz gets an anechoic F3 of 30.7 Hz with the port at 41 percent of its turbulence limit and only 10.6 metres per second at the mouth, one of the calmer vents in the range.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe port is the product\u003c\/h3\u003e\n  \u003cp\u003eA ported cabinet is easy to get wrong and the failure is audible. This one uses an\n  L-wrap slot port: a single folded wall running down the long side of the box past the\n  woofer ring, turning once through a faceted 90 degree bend, and opening through a\n  chamfered corner. One wall, one bend, 28.39 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is 3.00 inches wide by 6.25 tall, 18.8 square inches, and it exits\n  through a 26.5 square inch mouth. Air leaves at 10.6 metres per second at the tuning\n  frequency, against the 17.0 metre per second threshold where a slot port starts to\n  chuff. The bend is faceted rather than square because the inner corner of a 90 degree\n  turn is where flow separates, and a sharp corner there is what you hear.\u003c\/p\u003e\n  \u003cdiv class=\"df-highlight\"\u003e\n    \u003cp\u003e\u003cstrong\u003eThis enclosure ships dry.\u003c\/strong\u003e Polyfill goes in every sealed Proline X\n    cabinet we build. It does not go in this one. Damping material in a vented box\n    changes the effective volume the port is tuned against, which moves the tuning\n    frequency away from the 33.5 Hz the port length was cut for. Adding it does not make\n    a ported box sound like a bigger ported box; it makes it a mistuned one.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eRun a subsonic filter\u003c\/h3\u003e\n  \u003cp\u003eThis is not optional advice on a vented enclosure. Below tuning the port stops\n  loading the cone and excursion climbs without limit toward DC, so a 26 Hz high-pass at\n  24 dB per octave is part of the specification rather than a refinement of it. Set it\n  and the same cabinet takes substantially more power for the same cone travel. Leave it\n  out and the driver runs out of suspension on material you cannot hear.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, not an electrical\n  one: it is the power at which the cone reaches the end of its linear travel in this\n  box. What the voice coil can dissipate as heat is a separate ceiling set by JL Audio, not by\n  the cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eCut for this driver, not for a catalogue\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eMounting\u003c\/h4\u003e\n\u003cp\u003eCut to JL Audio's published 9.055 inch cutout with a\n    11.500 inch ring bonded under the baffle. The ring drops into a machined recess so it\n    self-centres, and it roughly doubles the glue area over a butt joint.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThreaded, not screwed\u003c\/h4\u003e\n\u003cp\u003eEight #8-32 hurricane nuts are\n    driven into the ring before it is bonded, so the driver mounts into steel rather than\n    into MDF and survives being unbolted more than once. The ring is cut with sixteen\n    positions so the driver can be clocked to whatever orientation the install needs;\n    eight are fitted.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eA windowed brace sits between the woofer cutout\n    and the port terminus, 2.81 inches clear of the cutout edge. The window is not weight\n    saving: a solid panel there would split the cavity and turn the cabinet into a\n    bandpass.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eJoinery\u003c\/h4\u003e\n\u003cp\u003eV-groove and dado throughout, 0.75 inch\n    material, double-layer 1.5 inch baffle. The walls seat into dados in both the lid and\n    the baffle rather than butting against them.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003ePower, wiring and warranty\u003c\/h3\u003e\n  \u003cp\u003eJL Audio rate the 10W0v3 at 300 W RMS. Terminal cup is side mounted, as on every Performance\n  Optimized cabinet. If you are running a dual 2 ohm driver, note that parallel wiring\n  presents 1 ohm, which many amplifiers are not stable into; series at 4 ohm is the safe\n  default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. The enclosure is built to order in\n  Tullahoma, Tennessee, and the driver is not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-cta\"\u003e\n  \u003cp\u003eCut, folded and finished for the JL Audio 10W0v3. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from JL Audio's published\n  parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44774326468697,"sku":"PO 10-P DF W0V3","price":309.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_10-P_DF_W0V3_Front_353fd4b4-9367-4ec1-a1a1-14069c32a8d3.jpg?v=1788319596"},{"product_id":"performance-optimized-down-fire-ported-10-enclosure-jl-audio-10w1v3","title":"JL Audio 10W1v3 Box: Ported 10\" Down Fire Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:54px 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10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Performance Optimized Down Fire 10\" Ported\u003c\/h2\u003e\n  \u003cp\u003eA 26.2 Hz motor, the lowest free-air resonance of any ten here\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.25 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 33.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 30.4 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the JL Audio 10W1v3\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.25\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e33.5\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e30.4\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e18.8\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 33.5 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe 10W1v3 resonates at 26.2 Hz in free air. No other ten inch driver in this programme is close, and only a handful of the twelves go lower. A motor that wants to move that far down is the raw material a vented alignment is built from.\u003c\/p\u003e\n  \u003cp\u003eLow Fs with 43.4 litres of Vas and a 0.45 Qts is the textbook ported combination: compliant, well damped, and still contributing where the port is doing its work. 1.25 cubic feet vented at 33.5 Hz reaches an anechoic F3 of 30.4 Hz with the mouth at 10.9 metres per second, comfortably under the 17 where a slot begins to chuff.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe port is the product\u003c\/h3\u003e\n  \u003cp\u003eA ported cabinet is easy to get wrong and the failure is audible. This one uses an\n  L-wrap slot port: a single folded wall running down the long side of the box past the\n  woofer ring, turning once through a faceted 90 degree bend, and opening through a\n  chamfered corner. One wall, one bend, 28.47 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is 3.00 inches wide by 6.25 tall, 18.8 square inches, and it exits\n  through a 26.5 square inch mouth. Air leaves at 10.9 metres per second at the tuning\n  frequency, against the 17.0 metre per second threshold where a slot port starts to\n  chuff. The bend is faceted rather than square because the inner corner of a 90 degree\n  turn is where flow separates, and a sharp corner there is what you hear.\u003c\/p\u003e\n  \u003cdiv class=\"df-highlight\"\u003e\n    \u003cp\u003e\u003cstrong\u003eThis enclosure ships dry.\u003c\/strong\u003e Polyfill goes in every sealed Proline X\n    cabinet we build. It does not go in this one. Damping material in a vented box\n    changes the effective volume the port is tuned against, which moves the tuning\n    frequency away from the 33.5 Hz the port length was cut for. Adding it does not make\n    a ported box sound like a bigger ported box; it makes it a mistuned one.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eRun a subsonic filter\u003c\/h3\u003e\n  \u003cp\u003eThis is not optional advice on a vented enclosure. Below tuning the port stops\n  loading the cone and excursion climbs without limit toward DC, so a 26 Hz high-pass at\n  24 dB per octave is part of the specification rather than a refinement of it. Set it\n  and the same cabinet takes substantially more power for the same cone travel. Leave it\n  out and the driver runs out of suspension on material you cannot hear.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, not an electrical\n  one: it is the power at which the cone reaches the end of its linear travel in this\n  box. What the voice coil can dissipate as heat is a separate ceiling set by JL Audio, not by\n  the cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eCut for this driver, not for a catalogue\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eMounting\u003c\/h4\u003e\n\u003cp\u003eCut to JL Audio's published 9.055 inch cutout with a\n    11.500 inch ring bonded under the baffle. The ring drops into a machined recess so it\n    self-centres, and it roughly doubles the glue area over a butt joint.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThreaded, not screwed\u003c\/h4\u003e\n\u003cp\u003eEight #8-32 hurricane nuts are\n    driven into the ring before it is bonded, so the driver mounts into steel rather than\n    into MDF and survives being unbolted more than once. The ring is cut with sixteen\n    positions so the driver can be clocked to whatever orientation the install needs;\n    eight are fitted.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eA windowed brace sits between the woofer cutout\n    and the port terminus, 2.77 inches clear of the cutout edge. The window is not weight\n    saving: a solid panel there would split the cavity and turn the cabinet into a\n    bandpass.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eJoinery\u003c\/h4\u003e\n\u003cp\u003eV-groove and dado throughout, 0.75 inch\n    material, double-layer 1.5 inch baffle. The walls seat into dados in both the lid and\n    the baffle rather than butting against them.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003ePower, wiring and warranty\u003c\/h3\u003e\n  \u003cp\u003eJL Audio rate the 10W1v3 at 300 W RMS. Terminal cup is side mounted, as on every Performance\n  Optimized cabinet. If you are running a dual 2 ohm driver, note that parallel wiring\n  presents 1 ohm, which many amplifiers are not stable into; series at 4 ohm is the safe\n  default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. The enclosure is built to order in\n  Tullahoma, Tennessee, and the driver is not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-cta\"\u003e\n  \u003cp\u003eCut, folded and finished for the JL Audio 10W1v3. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from JL Audio's published\n  parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44774327091289,"sku":"PO 10-P DF W1V3","price":309.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_10-P_DF_W1V3_Front_a7578aab-de1a-49aa-8b8f-287dd0ed655b.jpg?v=1788319604"},{"product_id":"performance-optimized-down-fire-ported-10-enclosure-jl-audio-10w3v3","title":"JL Audio 10W3v3 Box: Ported 10\" Down Fire Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:54px 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14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Performance Optimized Down Fire 10\" Ported\u003c\/h2\u003e\n  \u003cp\u003e1.31 dB of ripple with 500 watts behind it\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.25 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 34.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 31.9 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the JL Audio 10W3v3\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.25\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e34.0\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e31.9\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e18.8\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 34.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eMost of the flat cabinets in this range are flat because the driver is modest. The 10W3v3 is not: it takes 500 watts and moves 14 mm one way, and this cabinet still measures 1.31 dB of anechoic ripple. That combination of power and flatness is rare in the ten inch class.\u003c\/p\u003e\n  \u003cp\u003eA 33.0 Hz resonance with 32.2 litres of Vas and a 0.50 Qts is the middle of every range that matters, and middle is what a fixed footprint likes. 1.25 cubic feet vented at 34.0 Hz produces an F3 of 31.9 Hz and 2.45 dB of in-car spread, second only to the W0v3 among JL's tens while carrying two thirds more power.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe port is the product\u003c\/h3\u003e\n  \u003cp\u003eA ported cabinet is easy to get wrong and the failure is audible. This one uses an\n  L-wrap slot port: a single folded wall running down the long side of the box past the\n  woofer ring, turning once through a faceted 90 degree bend, and opening through a\n  chamfered corner. One wall, one bend, 27.70 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is 3.00 inches wide by 6.25 tall, 18.8 square inches, and it exits\n  through a 22.1 square inch mouth. Air leaves at 16.9 metres per second at the tuning\n  frequency, against the 17.0 metre per second threshold where a slot port starts to\n  chuff. The bend is faceted rather than square because the inner corner of a 90 degree\n  turn is where flow separates, and a sharp corner there is what you hear.\u003c\/p\u003e\n  \u003cdiv class=\"df-highlight\"\u003e\n    \u003cp\u003e\u003cstrong\u003eThis enclosure ships dry.\u003c\/strong\u003e Polyfill goes in every sealed Proline X\n    cabinet we build. It does not go in this one. Damping material in a vented box\n    changes the effective volume the port is tuned against, which moves the tuning\n    frequency away from the 34.0 Hz the port length was cut for. Adding it does not make\n    a ported box sound like a bigger ported box; it makes it a mistuned one.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eRun a subsonic filter\u003c\/h3\u003e\n  \u003cp\u003eThis is not optional advice on a vented enclosure. Below tuning the port stops\n  loading the cone and excursion climbs without limit toward DC, so a 27 Hz high-pass at\n  24 dB per octave is part of the specification rather than a refinement of it. Set it\n  and the same cabinet takes substantially more power for the same cone travel. Leave it\n  out and the driver runs out of suspension on material you cannot hear.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, not an electrical\n  one: it is the power at which the cone reaches the end of its linear travel in this\n  box. What the voice coil can dissipate as heat is a separate ceiling set by JL Audio, not by\n  the cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eCut for this driver, not for a catalogue\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eMounting\u003c\/h4\u003e\n\u003cp\u003eCut to JL Audio's published 9.055 inch cutout with a\n    11.500 inch ring bonded under the baffle. The ring drops into a machined recess so it\n    self-centres, and it roughly doubles the glue area over a butt joint.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThreaded, not screwed\u003c\/h4\u003e\n\u003cp\u003eEight #8-32 hurricane nuts are\n    driven into the ring before it is bonded, so the driver mounts into steel rather than\n    into MDF and survives being unbolted more than once. The ring is cut with sixteen\n    positions so the driver can be clocked to whatever orientation the install needs;\n    eight are fitted.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eA windowed brace sits between the woofer cutout\n    and the port terminus, 3.16 inches clear of the cutout edge. The window is not weight\n    saving: a solid panel there would split the cavity and turn the cabinet into a\n    bandpass.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eJoinery\u003c\/h4\u003e\n\u003cp\u003eV-groove and dado throughout, 0.75 inch\n    material, double-layer 1.5 inch baffle. The walls seat into dados in both the lid and\n    the baffle rather than butting against them.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003ePower, wiring and warranty\u003c\/h3\u003e\n  \u003cp\u003eJL Audio rate the 10W3v3 at 500 W RMS. Terminal cup is side mounted, as on every Performance\n  Optimized cabinet. If you are running a dual 2 ohm driver, note that parallel wiring\n  presents 1 ohm, which many amplifiers are not stable into; series at 4 ohm is the safe\n  default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. The enclosure is built to order in\n  Tullahoma, Tennessee, and the driver is not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-cta\"\u003e\n  \u003cp\u003eCut, folded and finished for the JL Audio 10W3v3. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from JL Audio's published\n  parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44774327746649,"sku":"PO 10-P DF W3V3","price":309.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_10-P_DF_W3V3_Front_dbc6b436-bea7-4f30-aa6f-68ebd42ae358.jpg?v=1788319612"},{"product_id":"performance-optimized-down-fire-ported-10-enclosure-jl-audio-10w6v3","title":"JL Audio 10W6v3 Box: Ported 10\" Down Fire Enclosure","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:54px 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solid #44403c;border-radius:8px;overflow:hidden;margin:18px 0}.df-enc-head{padding:12px 16px;font-size:.82em;font-weight:700;letter-spacing:.5px;text-transform:uppercase;color:#99abff;background:#001264}.df-enc-table{width:100%;border-collapse:collapse}.df-enc-table th{background:#0c0a09;color:#a8a29e;font-size:.78em;text-transform:uppercase;letter-spacing:.5px;padding:10px 14px;text-align:left;border-bottom:1px solid #44403c}.df-enc-table td{padding:12px 14px;border-bottom:1px solid #292524;color:#d6d3d1;font-size:.95em}.df-enc-table tr:last-child td{border-bottom:none}.df-opt td{background:#14532d;color:#fff;font-weight:600}.df-char{display:block;font-size:.78em;color:#a8a29e;font-weight:400;margin-top:2px}.df-opt .df-char{color:#86efac}.df-graph{background:#0c0a09;border:1px solid #44403c;border-radius:8px;padding:14px;margin:18px 0}.df-graph-title{font-size:.78em;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:#a8a29e;margin:0 0 10px}.df-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}.df-legend-item{display:flex;align-items:center;gap:6px;font-size:12px;color:#a8a29e}.df-sw{width:22px;height:3px;border-radius:2px;display:inline-block}.df-note{background:#292524;border:1px solid #44403c;border-radius:8px;padding:14px 16px;margin-top:10px}.df-note p{margin:0;color:#d6d3d1;font-size:13.5px;line-height:1.6}.df-link{color:#7089ff;text-decoration:underline}.df-cta{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:40px 36px;text-align:center;color:#fff}.df-cta h3{color:#fff;font-size:1.4em;margin:0 0 10px;border:none;padding:0}.df-cta p{opacity:.92;margin:0 auto;max-width:640px;color:#d6d3d1}.df-tier{overflow-x:auto;margin:18px 0;border:1px solid #44403c;border-radius:8px}.df-tier table{width:100%;border-collapse:collapse;min-width:660px}.df-tier th{background:#0c0a09;color:#a8a29e;font-size:.74em;text-transform:uppercase;letter-spacing:.6px;padding:12px 14px;text-align:left;border-bottom:1px solid #44403c;font-weight:700}.df-tier th.on{background:#001264;color:#99abff}.df-tier td{padding:11px 14px;border-bottom:1px solid #292524;color:#a8a29e;font-size:.88em;vertical-align:top;line-height:1.55}.df-tier td.a{color:#d6d3d1;font-weight:700;background:#1c1917;width:19%}.df-tier td.on{background:rgba(91,120,255,.10);color:#d6d3d1}.df-tier tr:last-child td{border-bottom:none}@media(max-width:600px){.df-hero h2{font-size:1.7em}.df-section,.df-enc,.df-cta,.df-hero{padding-left:20px;padding-right:20px}}\u003c\/style\u003e\n\u003cdiv class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Performance Optimized Down Fire 10\" Ported\u003c\/h2\u003e\n  \u003cp\u003e19 mm of travel and 600 watts, the most capable ten JL makes\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.22 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 35.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 29.8 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the JL Audio 10W6v3\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.22\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e35.5\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e29.8\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e20.3\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 35.5 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe 10W6v3 is JL's flagship ten: 19 mm of one-way excursion, 600 watts, and a 30.1 Hz free-air resonance. In displacement terms it outguns every other ten in this programme and several of the twelves, and this cabinet is built to let it work rather than to make it behave.\u003c\/p\u003e\n  \u003cp\u003e1.22 cubic feet vented at 35.5 Hz reaches an anechoic F3 of 29.8 Hz. The tuning sits higher than the other JL tens on purpose: a driver with this much displacement needs the port doing more of the work at the bottom, or the cone runs out of room before the amplifier runs out of watts.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe port is the product\u003c\/h3\u003e\n  \u003cp\u003eA ported cabinet is easy to get wrong and the failure is audible. This one uses an\n  L-wrap slot port: a single folded wall running down the long side of the box past the\n  woofer ring, turning once through a faceted 90 degree bend, and opening through a\n  chamfered corner. One wall, one bend, 28.29 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is 3.25 inches wide by 6.25 tall, 20.3 square inches, and it exits\n  through a 26.5 square inch mouth. Air leaves at 16.9 metres per second at the tuning\n  frequency, against the 17.0 metre per second threshold where a slot port starts to\n  chuff. The bend is faceted rather than square because the inner corner of a 90 degree\n  turn is where flow separates, and a sharp corner there is what you hear.\u003c\/p\u003e\n  \u003cdiv class=\"df-highlight\"\u003e\n    \u003cp\u003e\u003cstrong\u003eThis enclosure ships dry.\u003c\/strong\u003e Polyfill goes in every sealed Proline X\n    cabinet we build. It does not go in this one. Damping material in a vented box\n    changes the effective volume the port is tuned against, which moves the tuning\n    frequency away from the 35.5 Hz the port length was cut for. Adding it does not make\n    a ported box sound like a bigger ported box; it makes it a mistuned one.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eRun a subsonic filter\u003c\/h3\u003e\n  \u003cp\u003eThis is not optional advice on a vented enclosure. Below tuning the port stops\n  loading the cone and excursion climbs without limit toward DC, so a 28 Hz high-pass at\n  24 dB per octave is part of the specification rather than a refinement of it. Set it\n  and the same cabinet takes substantially more power for the same cone travel. Leave it\n  out and the driver runs out of suspension on material you cannot hear.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, not an electrical\n  one: it is the power at which the cone reaches the end of its linear travel in this\n  box. What the voice coil can dissipate as heat is a separate ceiling set by JL Audio, not by\n  the cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eCut for this driver, not for a catalogue\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eMounting\u003c\/h4\u003e\n\u003cp\u003eCut to JL Audio's published 9.016 inch cutout with a\n    11.500 inch ring bonded under the baffle. The ring drops into a machined recess so it\n    self-centres, and it roughly doubles the glue area over a butt joint.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThreaded, not screwed\u003c\/h4\u003e\n\u003cp\u003eEight #8-32 hurricane nuts are\n    driven into the ring before it is bonded, so the driver mounts into steel rather than\n    into MDF and survives being unbolted more than once. The ring is cut with sixteen\n    positions so the driver can be clocked to whatever orientation the install needs;\n    eight are fitted.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eA windowed brace sits between the woofer cutout\n    and the port terminus, 2.86 inches clear of the cutout edge. The window is not weight\n    saving: a solid panel there would split the cavity and turn the cabinet into a\n    bandpass.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eJoinery\u003c\/h4\u003e\n\u003cp\u003eV-groove and dado throughout, 0.75 inch\n    material, double-layer 1.5 inch baffle. The walls seat into dados in both the lid and\n    the baffle rather than butting against them.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003ePower, wiring and warranty\u003c\/h3\u003e\n  \u003cp\u003eJL Audio rate the 10W6v3 at 600 W RMS. Terminal cup is side mounted, as on every Performance\n  Optimized cabinet. If you are running a dual 2 ohm driver, note that parallel wiring\n  presents 1 ohm, which many amplifiers are not stable into; series at 4 ohm is the safe\n  default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. The enclosure is built to order in\n  Tullahoma, Tennessee, and the driver is not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-cta\"\u003e\n  \u003cp\u003eCut, folded and finished for the JL Audio 10W6v3. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from JL Audio's published\n  parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44774328139865,"sku":"PO 10-P DF W6V3","price":309.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_10-P_DF_W6V3_Front_931601e3-504f-46b1-bb3c-1b0846efc460.jpg?v=1788319620"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/collections\/Ported_Subwoofer_Boxes.jpg?v=1788046027","url":"https:\/\/audiointensity.com\/collections\/ported-subwoofer-boxes.oembed?page=5","provider":"Audio Intensity","version":"1.0","type":"link"}