{"title":"Ported 12 Inch Subwoofer Boxes","description":"\u003cp\u003ePorted 12 inch subwoofer enclosures, standard, down-fire and wedge, each with a port sized to its driver and the tuning frequency stated on the listing. Ships dry. CNC-cut in Tullahoma, Tennessee.\u003c\/p\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-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":"Proline X Enclosure | X Series | Fits Kicker Solo X 12\" Subwoofer","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica 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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 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 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\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 31.0 Hz through a 44.5 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 26.5 Hz on this airspace, 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 676 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 15.00\" H x 21.50\" 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 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 44.5 square inches tuned to 31.0 Hz; the port stays under the chuff threshold up to 676 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":"None - Carpet Only","offer_id":43165514334297,"sku":"Pro12-P KIK NA","price":570.99,"currency_code":"USD","in_stock":true},{"title":"Standard - Hex and Flag","offer_id":43165514367065,"sku":"Pro12-P KIK HEX","price":600.99,"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":"skar-evl-12-subwoofer-box","title":"Professional Series Ported 12\" Enclosure | Skar Audio EVL-12","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\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 32.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTriple 2.25\" baffle\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the 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 32.0 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 32.0 Hz through a 26.0 square inch port. F3 lands at 26.9 Hz with 4.04 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 391 W before the mouth velocity crosses the chuff threshold, well under the coil's own 1250 W power rating; above 391 W the port becomes audible before the coil runs into trouble. Ripple across the passband holds at 4.04 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\u003e30.00\" W x 14.50\" H x 15.25\" 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 26.0 square inches tuned to 32.0 Hz; the port stays under the chuff threshold up to 391 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 25 Hz subsonic filter, 24 dB per octave. Below tuning the vent stops loading the cone; with the filter in place the cone reaches 12.0 mm of its 23.5 mm at 1875 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":467.99,"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":"Professional Series Ported 12\" Enclosure | Sundown Audio SA-12","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 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 34.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 29.5 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 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\"\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\"\u003e29.5\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 34.5 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 34.5 Hz through a 32.6 square inch slot beside the woofer on the front face. F3 lands at 29.5 Hz with 2.56 dB of passband ripple. The 32.0 by 16.0 by 13.5 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: 8 to 12 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; one kit serves one woofer.\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 2.56 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 24.7 metres per second and the mouth 16.0 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 7.50 inches along its wall and turns once along the back wall for another 21.47 inches, which is why a 34.5 Hz tuning fits a 13.50 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 16.0 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\u003eEvery Professional cabinet is priced the same way, by its size: this one is 4.00 cubic feet outside. Delivery to the 48 states is inside the price; it ships as a 70 lb parcel and checkout adds nothing. The Performance Optimized 12 inch ported wedge is $399.99. The $80 difference is the larger box and the port this driver needs to run at its rating.\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 34.5 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 13.50\" 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: 8 to 12 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; one kit serves one woofer.\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 9.9 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\/products\/12-inch-ported-box-for-sundown-sa-12subwoofer-enclosuresproline-x-850136.jpg?v=1761970121"},{"product_id":"proline-x-enclosure-professional-series-fits-jl-audio-12w7-subwoofer","title":"Professional Series Ported 12\" Enclosure | JL Audio 12W7AE","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 12\" Enclosure | JL Audio 12W7AE\u003c\/h2\u003e\n  \u003cp\u003eA ported twelve-inch box built to JL Audio's own published numbers for the 12W7AE\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e2.25 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 33.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTriple 2.25\" baffle\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the JL Audio 12W7AE\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 JL Audio 12W7AE steps up the 10W7AE's motor and Xmax into a bigger frame, and this cabinet gives it 2.25 cubic feet net, vented at 33.0 Hz through a 26.0 square inch port. F3 lands at 29.4 Hz with 2.64 dB of passband ripple. It is the mid-size box in the professional JL Audio line.\u003c\/p\u003e\n  \u003cp\u003eThe port on this box stays clean up to 390 W before the mouth velocity crosses the chuff threshold, against the coil's own 1000 W power rating; JL Audio's own T\/S are published in full, the same as the smaller 10W7AE. Ripple across the passband holds at 2.64 dB, and the in-car curve stays tight across the passband rather than peaking at either end. There is no sealed reference for the 12W7AE in our data, so no sealed-versus-ported comparison is offered for this driver.\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 14.50\" H x 15.00\" 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 mid-size ported envelope built around the 12W7AE's larger frame and 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  \u003cp\u003eJL Audio publish full T\/S for the 12W7AE, and loudspeakerdatabase.com mirrors the same coil-specific figures used here. Scott's Q2 catalog sheet credits this cabinet with two and a half cubic feet net; the store's 2.25 is what actually shipped and is the figure used above.\u003c\/p\u003e\n  \u003cp\u003eThis cabinet is 2.25 cubic feet net, with a slot port of 26.0 square inches tuned to 33.0 Hz; the port stays under the chuff threshold up to 390 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 26 Hz subsonic filter, 24 dB per octave. Below tuning the vent stops loading the cone; with the filter in place the cone reaches 13.7 mm of its 29.0 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":43199515590745,"sku":"Pro JL 12W7","price":501.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/proline-x-enclosure-professional-series-fits-jl-audio-12w7-subwoofersubwoofer-enclosuresproline-x-7450177.webp?v=1779355149"},{"product_id":"proline-x-enclosure-x-series-fits-dual-kicker-solo-x-12-subwoofer","title":"Proline X Enclosure | X Series | Fits Dual Kicker Solo X 12\" Subwoofer","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 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":"performance-optimized-down-fire-ported-12-enclosure-prodigy-nb3-12","title":"Performance Optimized Down Fire Ported 12\" Shallow Sub Enclosure | Prodigy NB3-12","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 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":329.99,"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":"Performance Optimized Down Fire Ported 12\" Enclosure | Prodigy NB2-12","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":329.99,"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-12-enclosure-image-dynamics-idq12-v4","title":"Performance Optimized Down Fire Ported 12\" Enclosure | Image Dynamics IDQ12 V4","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":329.99,"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-12-enclosure-jl-audio-12tw3","title":"Performance Optimized Down Fire Ported 12\" Shallow Sub Enclosure | JL Audio 12TW3","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 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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":329.99,"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":"Performance Optimized Down Fire Ported 12\" Enclosure | Arc Audio X2V2 12","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":329.99,"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":"Performance Optimized Down Fire Ported 12\" Shallow Sub Enclosure | Wavtech thinPRO12","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 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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":329.99,"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-12-enclosure-image-dynamics-id12-v4","title":"Performance Optimized Down Fire Ported 12\" Enclosure | Image Dynamics ID12 V4","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 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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 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":329.99,"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-12-enclosure-image-dynamics-idqs12","title":"Performance Optimized Down Fire Ported 12\" Enclosure | Image Dynamics IDQS12","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 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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":329.99,"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-12-enclosure-jl-audio-12tw1","title":"Performance Optimized Down Fire Ported 12\" Enclosure | JL Audio 12TW1","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 4.61 inch thin-line twelve that measures like a full-depth one\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.42 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 34.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 30.8 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 12TW1\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\"\u003e1.42\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\"\u003e30.8\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 34.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe 12TW1 mounts in 4.61 inches, well under the W3v3's 6.65 and the W6v3's 7.52, and this cabinet still returns 1.93 dB of anechoic ripple and 2.64 dB of in-car spread. Shallow twelves usually give up the curve to get the depth. This one largely does not.\u003c\/p\u003e\n  \u003cp\u003eA 32.4 Hz resonance with 33.7 litres of Vas and a 0.53 Qts is a conventional, well-behaved set of numbers in an unconventional chassis, and that is the whole trick. 1.42 cubic feet vented at 34.0 Hz gets an anechoic F3 of 30.8 Hz with the port at just 36 percent of its turbulence limit, one of the calmest vents in the JL set.\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 3.50 inches wide by 6.25 tall, 21.9 square inches, and it exits\n  through a 26.5 square inch mouth. Air leaves at 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 11.063 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, 2.86 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 12TW1 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 12TW1. 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":44774328434777,"sku":"PO 12-P DF TW1","price":329.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_DF_TW1_Front_22117318-4476-4062-9188-e09b7dce3bd8.jpg?v=1788319678"},{"product_id":"performance-optimized-down-fire-ported-12-enclosure-jl-audio-12w0v3","title":"Performance Optimized Down Fire Ported 12\" Enclosure | JL Audio 12W0v3","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\u003eVented at 30.5 Hz, the lowest tuning of any cabinet we build\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\"\u003eTuned 30.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 35.6 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the JL Audio 12W0v3\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\"\u003e1.50\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\"\u003e30.5\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\"\u003e35.6\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\"\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 30.5 Hz\u003c\/h3\u003e\n  \u003cp\u003eThis cabinet is tuned to 30.5 Hz. Nothing else in the ported range goes lower, and the reason is the driver: 71.6 litres of Vas with a 28.4 Hz free-air resonance is a large, soft suspension that keeps contributing well below where most twelves have given up.\u003c\/p\u003e\n  \u003cp\u003eA high-compliance driver is what makes a low tuning honest rather than cosmetic. Tuning a stiff motor down produces a dip above the vent; tuning this one down does not, because the cone is still working there. 1.50 cubic feet at 30.5 Hz holds 2.08 dB of in-car spread with the mouth at just 10.4 metres per second.\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, 28.43 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 10.4 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 30.5 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 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 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 11.063 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, 3.04 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 12W0v3 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 12W0v3. 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":44774328664153,"sku":"PO 12-P DF W0V3","price":329.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_DF_W0V3_Front_93576546-9ad8-4368-9c32-eaa8ce48af9b.jpg?v=1788319694"},{"product_id":"performance-optimized-down-fire-ported-12-enclosure-jl-audio-12w1v3","title":"Performance Optimized Down Fire Ported 12\" Enclosure | JL Audio 12W1v3","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\u003e0.94 dB of in-car spread, second flattest of anything we build\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.54 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 31.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 33.0 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 12W1v3\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\"\u003e1.54\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\"\u003e33.0\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 31.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eAcross 25 to 60 Hz in a vehicle, this cabinet varies by 0.94 dB. Only the Image Dynamics ID10 is flatter, and not by much. Of every ported box in the programme this is the one to buy if what you want is for the bottom end to simply be there, evenly, without a character of its own.\u003c\/p\u003e\n  \u003cp\u003e72.0 litres of Vas and a 26.6 Hz free-air resonance make the 12W1v3 one of the most compliant drivers in the range, and compliance is what lets a vented alignment sit flat instead of peaking. 1.54 cubic feet tuned to 31.0 Hz is a large box for a 300 watt driver, and that is the point: the cabinet is sized for the response, not for the 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, 29.02 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 10.1 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 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 11.063 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, 2.97 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\u003eJL Audio rate the 12W1v3 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 12W1v3. 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":44774328959065,"sku":"PO 12-P DF W1V3","price":329.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_DF_W1V3_Front_a70da334-d87d-41b3-8d07-f24b09ecfa47.jpg?v=1788319702"},{"product_id":"performance-optimized-down-fire-ported-12-enclosure-jl-audio-12w3v3","title":"Performance Optimized Down Fire Ported 12\" Enclosure | JL Audio 12W3v3","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\u003e80.5 litres of Vas, the most compliant driver in the programme\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 31.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 35.9 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 12W3v3\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\"\u003e31.5\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\"\u003e35.9\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 31.5 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe 12W3v3 has 80.5 litres of Vas. That is the largest figure of any driver in this programme, edging the Arc X2V2's 79.3, and it describes a suspension so free that the enclosure sets the alignment almost single-handedly. The result is a cabinet that is top-three on both flatness measures at once.\u003c\/p\u003e\n  \u003cp\u003e1.10 dB of anechoic ripple and 1.18 dB of in-car spread, from a driver taking 500 watts and moving 13 mm. Flatness of that order normally comes from a modest motor; here it comes from a compliant one, which is a much better trade. Vented at 31.5 Hz in 1.43 cubic feet, the port sits at 51 percent of its turbulence limit.\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, 28.05 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 14.8 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 31.5 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 25 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 11.063 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, 2.98 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 12W3v3 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 12W3v3. 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":44774329417817,"sku":"PO 12-P DF W3V3","price":329.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_DF_W3V3_Front_5f3afc89-91e9-4d9b-adad-dcdd70908988.jpg?v=1788319710"},{"product_id":"performance-optimized-down-fire-ported-12-enclosure-jl-audio-12w6v3","title":"Performance Optimized Down Fire Ported 12\" Enclosure | JL Audio 12W6v3","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\u003e19 mm and 600 watts, and the only JL cabinet over 7.75 inches tall\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 33.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 31.2 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 12W6v3\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\"\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\"\u003e31.2\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\"\u003e21.2\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 33.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe 12W6v3 is JL's flagship twelve: 19 mm of one-way travel, 600 watts, and a 26.9 Hz free-air resonance. It is the most capable driver of the fifteen JL cabinets here, and the only one whose motor forces the box above the line's standard 7.75 inch height.\u003c\/p\u003e\n  \u003cp\u003e1.45 cubic feet vented at 33.0 Hz reaches an anechoic F3 of 31.2 Hz while holding 2.36 dB of in-car spread, which is a genuinely good result for a driver with this much displacement. Low resonance plus heavy motor is a combination that usually costs curve shape; here it mostly does not.\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, 28.34 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is 3.25 inches wide by 6.52 tall, 21.2 square inches, and it exits\n  through a 27.7 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 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 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 11.024 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, 2.83 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\u003eJL Audio rate the 12W6v3 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 12W6v3. 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":44774330892377,"sku":"PO 12-P DF W6V3","price":329.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_DF_W6V3_Front_1c4b346d-df75-4af5-96d6-81beaeea4011.jpg?v=1788319719"},{"product_id":"performance-optimized-down-fire-ported-12-enclosure-rockford-fosgate-p1s2-12","title":"Performance Optimized Down Fire Ported 12\" Enclosure | Rockford Fosgate P1S2-12","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 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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 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003e88 litres of Vas and a 29 Hz tuning, both the extremes of the range\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 29.0 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 Rockford Fosgate P1S2-12\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\"\u003e1.52\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\"\u003e29.0\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\"\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 29.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe Punch P1 12 has 88.3 litres of Vas. That is the most compliant driver in this entire programme, past the JL 12W3v3's 80.5 and the Arc X2V2's 79.3. It lets this cabinet tune to 29.0 Hz, which is also the lowest tuning of anything we build. Both records belong to Rockford's least expensive twelve.\u003c\/p\u003e\n  \u003cp\u003eA suspension that free means the box sets the alignment almost by itself, and the result is 0.92 dB of in-car spread across 25 to 60 Hz, the flattest of any ported cabinet in the range bar one. The port loafs at 36 percent of its turbulence limit and 7.9 metres per second at the mouth, the quietest vent here.\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, 28.49 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 7.9 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 29.0 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 23 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 Rockford Fosgate, 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 Rockford Fosgate's published 11.220 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, 3.21 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\u003eRockford Fosgate rate the P1S2-12 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 Rockford Fosgate P1S2-12. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from Rockford Fosgate'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":44775495696473,"sku":"PO 12-P DF P1","price":329.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_DF_P1_Front.jpg?v=1788319140"},{"product_id":"performance-optimized-down-fire-ported-12-enclosure-rockford-fosgate-p2d2-12","title":"Performance Optimized Down Fire Ported 12\" Enclosure | Rockford Fosgate P2D2-12","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\u003e0.97 dB in-car with 400 watts and 13 mm behind it\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.47 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 30.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 34.6 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Rockford Fosgate P2D2-12\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\"\u003e1.47\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\"\u003e30.0\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\"\u003e34.6\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\"\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 30.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eThis cabinet measures 0.97 dB of in-car spread while carrying a driver rated for 400 watts with 13.3 mm of one-way travel. Flatness of that order usually belongs to modest motors; the Punch P2 12 is not one, and that combination is what makes it the pick of Rockford's twelves for most systems.\u003c\/p\u003e\n  \u003cp\u003e81.5 litres of Vas with a 26.0 Hz resonance and a 0.52 Qts is close to the textbook ported driver, and 1.47 cubic feet vented at 30.0 Hz asks nothing unusual of it. 1.95 dB of anechoic ripple is the second flattest of the Rockford set.\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, 27.47 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 17.7 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 30.0 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 Rockford Fosgate, 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 Rockford Fosgate's published 11.220 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, 3.47 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\u003eRockford Fosgate rate the P2D2-12 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 Rockford Fosgate P2D2-12. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from Rockford Fosgate'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":44775495827545,"sku":"PO 12-P DF P2","price":329.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_DF_P2_Front.jpg?v=1788319148"},{"product_id":"performance-optimized-down-fire-ported-12-enclosure-rockford-fosgate-p3d4-12","title":"Performance Optimized Down Fire Ported 12\" Enclosure | Rockford Fosgate P3D4-12","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\u003e15.9 mm and 600 watts with 1.44 dB in-car, the balanced Punch twelve\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 32.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 32.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Rockford Fosgate P3D4-12\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\"\u003e1.44\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\"\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\"\u003e32.5\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 32.5 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe Punch P3 12 is the model most people picture when they hear the name, and it earns the position: 600 watts, 15.9 mm of one-way travel, a 27.7 Hz resonance and 57.7 litres of Vas. This cabinet turns that into 1.44 dB of in-car spread, which is a lot of output for very little compromise.\u003c\/p\u003e\n  \u003cp\u003e1.44 cubic feet vented at 32.5 Hz reaches an anechoic F3 of 32.5 Hz with 2.18 dB of ripple. A 0.52 Qts on a driver with this much displacement is what keeps the passband tidy, and the port runs at 49 percent of its turbulence limit rather than being pushed.\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, 28.34 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 14.2 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 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 Rockford Fosgate, 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 Rockford Fosgate's published 11.250 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, 2.96 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\u003eRockford Fosgate rate the P3D4-12 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 Rockford Fosgate P3D4-12. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from Rockford Fosgate'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":44775497367641,"sku":"PO 12-P DF P3","price":329.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_DF_P3_Front.jpg?v=1788319156"},{"product_id":"performance-optimized-down-fire-ported-12-enclosure-rockford-fosgate-p3sd4-12","title":"Performance Optimized Down Fire Ported 12\" Enclosure | Rockford Fosgate P3SD4-12","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 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003eA 3.65 inch shallow twelve that measures 0.99 dB in-car\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.51 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 34.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 32.7 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Rockford Fosgate P3SD4-12\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\"\u003e1.51\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\"\u003e32.7\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 34.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe P3 Shallow 12 mounts in 3.65 inches, and this cabinet returns 0.99 dB of in-car spread. A shallow twelve in the top three of the whole range for flatness is not the usual outcome: depth normally costs curve, and here it has cost almost nothing.\u003c\/p\u003e\n  \u003cp\u003e35.3 litres of Vas with a 0.72 Qts is a well-damped motor, and 1.51 cubic feet vented at 34.0 Hz gives it a large box relative to its compliance. The port is 23.4 square inches at 37 percent of its turbulence limit with 12.3 metres per second at the mouth, so nothing is being 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, 28.36 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 26.5 square inch mouth. Air leaves at 12.3 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 Rockford Fosgate, 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 Rockford Fosgate's published 11.220 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, 3.16 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\u003eRockford Fosgate rate the P3SD4-12 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 Rockford Fosgate P3SD4-12. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from Rockford Fosgate'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":44775497433177,"sku":"PO 12-P DF P3S","price":329.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_DF_P3S_Front.jpg?v=1788319164"},{"product_id":"performance-optimized-down-fire-ported-12-enclosure-rockford-fosgate-r2d2-12","title":"Performance Optimized Down Fire Ported 12\" Enclosure | Rockford Fosgate R2D2-12","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\u003e1.41 dB of ripple, the flattest passband of any Rockford cabinet\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.55 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 35.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 42.3 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Rockford Fosgate R2D2-12\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\"\u003e1.55\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\"\u003e42.3\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 35.0 Hz\u003c\/h3\u003e\n  \u003cp\u003e1.41 dB of anechoic passband ripple is the flattest measurement of the seventeen Rockford cabinets in this line, and among the flattest in the whole programme. It comes from the Prime R2 12, which is the least powerful twelve Rockford make, and the two facts are connected.\u003c\/p\u003e\n  \u003cp\u003eA driver with only 6.5 mm of one-way travel never asks the cabinet for much, and a cabinet that is not being asked for much can sit very flat. 66.4 litres of Vas with a 0.58 Qts in 1.55 cubic feet at 35.0 Hz gives the calmest port in the entire programme: 24 percent of its turbulence limit, 11.0 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, 27.54 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 11.0 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 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 Rockford Fosgate, 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 Rockford Fosgate's published 11.250 inch cutout with a\n    13.875 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, 3.53 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\u003eRockford Fosgate rate the R2D2-12 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 Rockford Fosgate R2D2-12. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from Rockford Fosgate'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":44775497564249,"sku":"PO 12-P DF R2","price":329.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_DF_R2_Front.jpg?v=1788319172"},{"product_id":"performance-optimized-down-fire-ported-12-enclosure-rockford-fosgate-r2sd2-12","title":"Performance Optimized Down Fire Ported 12\" Enclosure | Rockford Fosgate R2SD2-12","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 3.60 inch shallow twelve with the calmest port in the range\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.56 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 32.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 35.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Rockford Fosgate R2SD2-12\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\"\u003e1.56\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\"\u003e35.5\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 32.5 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe Prime R2 Shallow 12 mounts in 3.60 inches, and its port runs at 28 percent of its turbulence limit with 10.4 metres per second at the mouth. That is the most relaxed vent of any Rockford cabinet here and among the calmest in the whole programme, which is not what a shallow driver usually delivers.\u003c\/p\u003e\n  \u003cp\u003e65.4 litres of Vas with a 29.7 Hz resonance is a compliant motor in a shallow chassis, an unusual pairing, and it means 1.56 cubic feet at 32.5 Hz needs nothing forced from the vent. The cabinet holds the largest net volume of the Rockford set.\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, 27.93 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 22.1 square inch mouth. Air leaves at 10.4 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 Rockford Fosgate, 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 Rockford Fosgate's published 11.250 inch cutout with a\n    13.875 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, 3.39 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\u003eRockford Fosgate rate the R2SD2-12 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 Rockford Fosgate R2SD2-12. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from Rockford Fosgate'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":44775498023001,"sku":"PO 12-P DF R2S","price":329.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_DF_R2S_Front.jpg?v=1788319180"},{"product_id":"performance-optimized-down-fire-ported-12-enclosure-rockford-fosgate-t0d412","title":"Performance Optimized Down Fire Ported 12\" Enclosure | Rockford Fosgate T0D412","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 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003e30.6 Hz anechoic, the deepest reach of any Rockford twelve\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 32.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 30.6 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Rockford Fosgate T0D412\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\"\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\"\u003e30.6\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\"\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 32.5 Hz\u003c\/h3\u003e\n  \u003cp\u003eOf the eight Rockford twelves this line covers, this one reaches lowest: an anechoic F3 of 30.6 Hz, four full hertz below the P2 and P1 twelves that beat it on flatness. If extension is what you are buying rather than curve shape, the Power T0 is the Rockford answer.\u003c\/p\u003e\n  \u003cp\u003eA 26.0 Hz free-air resonance with 55.1 litres of Vas and a 0.53 Qts is a low, well-damped motor, and 1.44 cubic feet vented at 32.5 Hz lets it work rather than restraining it. 700 watts and 14.8 mm of travel mean there is real displacement behind the reach.\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, 28.34 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 15.8 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 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 Rockford Fosgate, 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 Rockford Fosgate's published 11.250 inch cutout with a\n    13.750 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, 2.96 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\u003eRockford Fosgate rate the T0D412 at 700 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 Rockford Fosgate T0D412. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from Rockford Fosgate'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":44775498055769,"sku":"PO 12-P DF T0","price":329.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_DF_T0_Front.jpg?v=1788319188"},{"product_id":"performance-optimized-down-fire-ported-12-enclosure-rockford-fosgate-t1d412","title":"Performance Optimized Down Fire Ported 12\" Enclosure | Rockford Fosgate T1D412","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\u003e800 watts, the most power of any driver in the programme\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 32.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 33.7 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Rockford Fosgate T1D412\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\"\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\"\u003e33.7\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\"\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 32.5 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe Power T1 12 takes 800 watts RMS and moves 16.0 mm one way. That is the highest power rating of any driver in this entire programme, and unusually the cabinet built for it still measures 1.26 dB of in-car spread, which puts it in the top handful for flatness as well.\u003c\/p\u003e\n  \u003cp\u003eA 29.2 Hz resonance with 55.8 litres of Vas is a low, compliant motor, and low resonance is what lets a driver this heavy hand over cleanly to the port instead of fighting it. 1.44 cubic feet vented at 32.5 Hz reaches an F3 of 33.7 Hz anechoic with cabin gain doing the rest.\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, 28.34 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 15.1 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 Rockford Fosgate, 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 Rockford Fosgate's published 11.250 inch cutout with a\n    13.750 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, 2.96 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\u003eRockford Fosgate rate the T1D412 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 Rockford Fosgate T1D412. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from Rockford Fosgate'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":44775500120153,"sku":"PO 12-P DF T1","price":329.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_DF_T1_Front.jpg?v=1788319196"},{"product_id":"performance-optimized-down-fire-ported-12-enclosure-kicker-compr12","title":"Performance Optimized Down Fire Ported 12\" Enclosure | Kicker CompR12","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 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003e17.5 mm of travel behind a 531 square centimetre cone, on 500 watts\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 33.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 35.4 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Kicker CompR12\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\"\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\"\u003e35.4\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 33.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eVolume displacement is the number that decides how loud a subwoofer can play at the bottom, and it is cone area multiplied by travel. The CompR 12 has 531 square centimetres and 17.5 mm, the third longest throw of any twelve in this programme. That combination is why it ports easily: there is enough swept volume to fill a cabinet this size without the driver reaching for its limits to do it.\u003c\/p\u003e\n  \u003cp\u003eTuned to 33.0 Hz in 1.49 cubic feet net, it produces 1.54 dB of anechoic passband ripple, the fifth flattest twelve in the range, and 1.22 dB of in-car spread. The excursion check has it at 7.5 mm of peak travel against 14.9 usable, which is roughly half. A driver with that much margin is not the thing limiting the system.\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, 28.52 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 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 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 Kicker, 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 Kicker's published 11.000 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, 2.97 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\u003eKicker rate the CompR12 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 Kicker CompR12. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from Kicker'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":44777010856025,"sku":"PO 12-P DF CWR","price":329.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_DF_CWR_Front.jpg?v=1788363961"},{"product_id":"performance-optimized-down-fire-ported-12-enclosure-kicker-comprt12","title":"Performance Optimized Down Fire Ported 12\" Enclosure | Kicker CompRT12","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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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\u003e59 litres of compliance behind a 3.75 inch motor, and Qms 12.85\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 32.5 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 Kicker CompRT12\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\"\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\"\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\"\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 32.5 Hz\u003c\/h3\u003e\n  \u003cp\u003eShallow drivers are usually stiff, because there is no room behind the cone for a suspension with any travel in it. The CompRT 12 is 3.75 inches deep and has 59.2 litres of Vas, which makes it the third most compliant of the twenty-two shallow-mount drivers in this programme and more compliant than most conventional twelves. Its mechanical Q of 12.85 is the second highest of all sixty-two.\u003c\/p\u003e\n  \u003cp\u003eCompliance and low mechanical loss together are what let a shallow driver tune low. This one sits at 32.5 Hz in 1.44 cubic feet with an anechoic F3 of 33.8 Hz and 1.18 dB of in-car spread, eighth flattest of the twenty-six twelves. The port runs 12.8 metres per second, well inside the chuff threshold.\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, 28.31 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 12.8 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 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 Kicker, 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 Kicker's published 11.000 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, 2.86 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\u003eKicker rate the CompRT12 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 Kicker CompRT12. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from Kicker'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":44777011150937,"sku":"PO 12-P DF CWRT","price":329.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_DF_CWRT_Front.jpg?v=1788363970"},{"product_id":"performance-optimized-down-fire-ported-12-enclosure-kicker-comp-gold12","title":"Performance Optimized Down Fire Ported 12\" Enclosure | Kicker Comp GOLD12","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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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 deepest cabinet in the programme, and the hardest-working port in it\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.54 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 35.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 37.2 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Kicker Comp GOLD12\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\"\u003e1.54\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\"\u003e37.2\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\"\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\u003eAt 18.00 inches this is the deepest enclosure we build in the ported Down Fire line, and its port is the closest to its own limit of any of the sixty-two: 16.7 metres per second at the mouth against a 17 threshold. Both facts come from the same source. The Competition GOLD 12 is a stiff, strongly-motored driver on 500 watts, and getting a flat vented alignment out of it takes every cubic inch the chassis has.\u003c\/p\u003e\n  \u003cp\u003e1.54 cubic feet net, tuned to 35.0 Hz, produces 2.23 dB of anechoic ripple and 2.30 dB of in-car spread. Bl 18.5 is the strongest motor of any Kicker driver in this programme, and it is what keeps the passband under control in a box this large. The airspace is not indulgence; a smaller cabinet puts a peak at tuning that this motor cannot damp away.\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, 27.71 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 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 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 Kicker, 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 Kicker's published 11.000 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, 3.57 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\u003eKicker rate the Comp GOLD12 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 Kicker Comp GOLD12. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from Kicker'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":44777011183705,"sku":"PO 12-P DF GOLD","price":329.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_DF_GOLD_Front.jpg?v=1788363978"},{"product_id":"performance-optimized-down-fire-ported-12-enclosure-kicker-compvr12","title":"Performance Optimized Down Fire Ported 12\" Enclosure | Kicker CompVR12","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 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003e0.82 dB of in-car spread, the flattest twelve in the entire programme\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\"\u003eTuned 30.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 33.6 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Kicker CompVR12\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\"\u003e1.50\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\"\u003e30.5\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\"\u003e33.6\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\"\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 30.5 Hz\u003c\/h3\u003e\n  \u003cp\u003eAcross sixty-two cabinets in this line, exactly one measures flatter in a vehicle than this one, and it is a ten. 0.82 dB of spread from 25 to 60 Hz is the flattest twelve inch result we have, and it comes from the combination this chassis was designed around: 27.0 Hz of free-air resonance, 70.4 litres of Vas and a tuning of 30.5 Hz, the fourth lowest of any cabinet in the programme.\u003c\/p\u003e\n  \u003cp\u003eIn-car flatness is not the same as anechoic flatness. It is the driver's own roll-off cancelling the cabin's rising gain, and getting it right needs a low Fs so there is still output down where the cabin is lifting hardest. Fs 27.0 Hz is the lowest of any Kicker driver in this programme, and 1.50 cubic feet tuned to 30.5 Hz places the roll-off exactly against the slope.\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, 28.56 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 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 30.5 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 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 Kicker, 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 Kicker's published 11.000 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, 3.01 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\u003eKicker rate the CompVR12 at 450 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 Kicker CompVR12. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from Kicker'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":44777011249241,"sku":"PO 12-P DF CVR","price":329.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_DF_CVR_Front.jpg?v=1788363945"},{"product_id":"performance-optimized-down-fire-ported-12-enclosure-kicker-compvt12","title":"Performance Optimized Down Fire Ported 12\" Enclosure | Kicker CompVT12","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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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\u003eQts 0.743, a sealed-leaning twelve, in the largest box the chassis will hold\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.54 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 35.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 35.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Kicker CompVT12\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\"\u003e1.54\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\"\u003e35.0\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\u003eQts 0.743 is high. It is the third highest of the twenty-six twelve inch cabinets in this programme, and conventionally a driver in that region is a sealed-box driver. Ported alignments want damping and this one arrives without much. What it has instead is 531 square centimetres of cone behind a motor only 4.375 inches deep, which is a combination worth building around even if it takes work.\u003c\/p\u003e\n  \u003cp\u003eThe work is airspace. 1.54 cubic feet net in an 18.00 inch cabinet is the joint largest in the programme, and it is what stops a lightly-damped driver putting a peak at tuning. Tuned to 35.0 Hz it lands at an anechoic F3 of 35.0 Hz and 2.17 dB of in-car spread, which for a shallow twelve with this much Qts is a genuinely good result.\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, 27.71 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 15.4 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 Kicker, 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 Kicker's published 11.000 inch cutout with a\n    13.625 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, 3.57 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\u003eKicker rate the CompVT12 at 450 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 Kicker CompVT12. Nothing on this page is a rule of thumb: the\n  alignment, the port geometry and the power figures all come from Kicker'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":44777011282009,"sku":"PO 12-P DF CVT","price":329.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_DF_CVT_Front.jpg?v=1788363953"},{"product_id":"performance-optimized-down-fire-ported-12-enclosure-arc-audio-arc-12","title":"Performance Optimized Down Fire Ported 12\" Enclosure | Arc Audio ARC 12","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 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003eFs 22.8 Hz and Qts 0.416, the lowest of both among the twelves\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.47 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 33.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 31.0 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 ARC 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\"\u003e1.47\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\"\u003e31.0\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\u003eOf the twenty-nine twelve inch cabinets in this programme, the ARC 12 has the lowest resonance and the lowest total Q. 22.8 Hz is a figure most twelves only reach after a very long break-in, if ever, and 0.416 says the motor is holding the cone rather than the suspension. Tuned to 33.0 Hz in 1.47 cubic feet it lands an anechoic F3 of 31.0 Hz, sixth deepest of the twelves, from a 350 W driver.\u003c\/p\u003e\n  \u003cp\u003e74 litres of Vas is a lot of compliance for a cone this size, and a low Qts is what stops that compliance turning into a hump at tuning. The passband measures 2.56 dB of ripple, mid-range for a twelve, with the mouth well inside its velocity limit -- an alignment with margin everywhere rather than one number pushed to the edge.\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, 29.03 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 10.0 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 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 11.000 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, 2.72 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 ARC 12 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 Arc Audio ARC 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":44786126028889,"sku":"PO 12-P DF ARC","price":329.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_DF_ARC_Front.jpg?v=1788373273"},{"product_id":"performance-optimized-down-fire-ported-12-enclosure-arc-audio-a-series-12","title":"Performance Optimized Down Fire Ported 12\" Enclosure | Arc Audio A-Series 12","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\u003eThe liveliest passband of any twelve we build, in the second-shallowest twelve inch cabinet\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.39 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 33.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 34.3 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eL-wrap slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Arc Audio A-Series 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\"\u003e1.39\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\"\u003e34.3\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\"\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\u003eEvery twelve in this programme is flatter than the A-Series 12. Its 3.86 dB of anechoic passband ripple is the highest of the twenty-nine, and this page says so first because the reason is structural rather than fixable: Qts 0.612 is a sealed-leaning driver, and 8 mm of travel means the alignment cannot be pushed toward the deeper, flatter tunings a longer coil would allow. What it has instead is 3.76 inches of mounting depth and a 16.5 inch cabinet, second shallowest of the twelves.\u003c\/p\u003e\n  \u003cp\u003eFs 25.0 Hz is the third lowest of the twelves, so the driver does reach -- 34.3 Hz anechoic from 1.39 cubic feet at 33.5 Hz -- and Arc's A-Series data reconciles exactly with itself, so the alignment is built on figures that agree. The ripple is the honest cost of porting a 0.61 Qts driver with a short coil, and it is still inside the limit this programme builds to.\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, 27.59 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 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 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 10.910 inch cutout with a\n    13.125 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, 3.01 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 A-Series 12 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 Arc Audio A-Series 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":44786126422105,"sku":"PO 12-P DF A","price":329.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_DF_A_Front.jpg?v=1788373265"},{"product_id":"performance-optimized-down-fire-ported-12-enclosure-arc-audio-sw-12","title":"Performance Optimized Down Fire Ported 12\" Enclosure | Arc Audio SW 12","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 Performance Optimized Down Fire 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003e2.4 inches deep with a 279 gram cone: the shallowest twelve here, fourth-deepest F3\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.46 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 34.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 30.8 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 SW 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\"\u003e1.46\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\"\u003e30.8\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 34.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe SW 12 mounts in 2.4 inches, the shallowest of the twenty-nine twelves in this programme, and carries a 279 gram moving mass -- a heavy cone for any twelve, let alone one this thin. Fs 33.1 Hz, Qts 0.624 and 33 litres of Vas describe a stiff, heavy driver, and in 1.46 cubic feet tuned to 34.0 Hz that combination reaches an anechoic F3 of 30.8 Hz, fourth deepest of the twelves.\u003c\/p\u003e\n  \u003cp\u003eUnlike its ten inch sibling, the SW 12 is as good in the car as on the bench: 1.86 dB of in-car spread, twelfth of the twelves, with 2.63 dB of anechoic ripple. The larger cone and lower resonance put the reach where the cabin lifts least, so the two curves stack more kindly than they do on the 10. Arc's Klippel data for this driver reconciles with itself to within a third of a percent.\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, 27.37 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 22.1 square inch mouth. Air leaves at 15.1 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 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 11.000 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, 3.30 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\u003eArc Audio rate the SW 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 Arc Audio SW 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":44786126553177,"sku":"PO 12-P DF SW","price":329.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_DF_SW_Front.jpg?v=1788373279"},{"product_id":"performance-optimized-wedge-ported-12-enclosure-image-dynamics-idmax12-v4","title":"Image Dynamics IDMAX12 V4 Ported 12\" Wedge Enclosure | Proline X","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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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 Wedge 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003eThe twelve the down fire cannot take, vented at 31.5 Hz in a trunk wedge\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.71 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 31.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 31.3 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eSide slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Image Dynamics IDMAX12 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\"\u003e1.71\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\"\u003e31.5\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\"\u003e31.3\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\"\u003e19.9\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 31.5 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe IDMAX12 V4 carries 8.071 inches of mounting depth, and that single figure rules it out of our ported Down Fire: the motor would push that cabinet to 8.57 inches tall against a hard 8.50 inch cap. A trunk wedge stands 15 inches tall for a single 12 and takes the motor in depth instead, so this is where the IDMAX12 goes ported. It gets 1.71 cubic feet net, vented at 31.5 Hz, in a cabinet 29 inches wide.\u003c\/p\u003e\n  \u003cp\u003eA 26 Hz free-air resonance on 72 litres of Vas is a motor that wants air and a low vent, and 31.5 Hz is where the in-car curve comes out flattest: 1.38 dB of spread across 25 to 60 Hz on 3.63 dB of anechoic ripple. Tuning lower would trade that for a bloated bottom octave once cabin gain is added; tuning higher gives up the reach the 26 Hz motor is paying for. Image Dynamics' own manual puts the IDMAX12 in a 1.75 cubic foot ported box tuned to 35 Hz for its Universal alignment; this cabinet is 1.85 gross, 1.71 net after the driver, vented 3.5 Hz lower for the in-car curve. The channel runs at 17 metres per second to get there, right at our ceiling, and the mouth carries a 1\/2 inch roundover on all three edges, so the opening at the face is 31 square inches and the air leaves it at 10.7, well under the 17 where a slot port starts to chuff.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eTrunk-load wedge, explained\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThe 20 degree face is the seat side\u003c\/h4\u003e\n\u003cp\u003eA factory rear seat back\n    leans about 20 degrees off vertical. The wedge's raked rear panel matches that lean and tucks\n    against it, so the cabinet uses the triangle of trunk floor a square box wastes.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThe driver fires rearward\u003c\/h4\u003e\n\u003cp\u003eThe baffle stays vertical and faces\n    the trunk opening. The trunk acts as the acoustic extension into the cabin; nothing about\n    the driver is angled.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003e16.46 inches at the base, 11.00 at the top\u003c\/h4\u003e\n\u003cp\u003e29.00 inches wide, 15 tall, 16.46 deep at the base tapering to 11.00 at the top. The base depth is set by the port panel clearing the motor, not by the magnet.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003e29.00 inches wide\u003c\/h4\u003e\n\u003cp\u003eWidth is the wedge's free dimension and it\n    buys two things at once here: airspace, and port length, because the port runs the full\n    width of the box.\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 port is the product\u003c\/h3\u003e\n  \u003cp\u003eThe port is a triangular slot in the bottom-rear corner. The floor and the raked back wall\n  are two of its three sides; the third is a single panel bevelled to sit flush against both.\n  It runs across the cabinet, opens into the box at the far end and exits through the side\n  panel: a straight run with no bend, 24.22 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is an isosceles triangle with 6.50 inch legs, 19.9 square inches, running at\n  17.0 metres per second at the tuning frequency. The mouth is that same triangle cut through\n  the side panel with its three edges rounded over at 1\/2 inch, so the opening at the face is\n  31.4 square inches and air leaves it at 10.7 metres per second, against the 17.0 metre per\n  second threshold where a slot port starts to chuff. The panel's throat end carries a 3\/8 inch\n  roundover for the same reason.\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 cabinet\n    we build. It does not go in this one. Damping material changes the effective volume the\n    port is tuned against, which moves the tuning away from the 31.5 Hz the port was cut for.\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\u003eBelow tuning the port stops loading the cone and excursion climbs without limit toward DC,\n  so a 25 Hz high-pass at 24 dB per octave is part of the specification. Set it and the same\n  cabinet takes substantially more power for the same cone travel.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, the power at which the\n  cone reaches the end of its linear travel in this box. What the voice coil can dissipate as\n  heat is a separate ceiling set by Image Dynamics.\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 through a\n    double-layer 1.5 inch baffle, with a cosmetic front layer routed for the acrylic insert.\n    Threaded inserts at every mounting location.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eClearance\u003c\/h4\u003e\n\u003cp\u003eImage Dynamics publish two Vas figures for this driver, 71.9 litres for the D2 and 62.4 for the D4, a 15 percent split that a shared cone and suspension cannot produce. The D2 column reproduces its own 26 Hz resonance from its published Mms and Cms within 1.5 percent; the D4 misses by 10 percent. This cabinet is built on the D2 figures, with Vas derived from Cms and Sd at 72.2 litres, which confirms the D2 column rather than correcting it. The cabinet fits either coil.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eTwo windowed C braces run the cabinet profile at the third points of the width and seat on the port panel; the windows keep the cavity one chamber.\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 Langboard\n    Elite MDF, the shell folded from one strip with the sides dropped into dados and the port\n    panel seated in dados of its own.\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 IDMAX12 V4 at 500 W RMS. Terminal cup is side mounted on the side opposite the port\n  mouth. A dual 2 ohm driver wired parallel presents 1 ohm, which many amplifiers are not\n  stable into; series at 4 ohm is the safe default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. Built to order in Tullahoma, Tennessee. The\n  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 IDMAX12 V4. The alignment, the port geometry and the power\n  figures all come from Image Dynamics's published parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Black","offer_id":44786358779993,"sku":"PO 12-P W IDMAX BB","price":399.99,"currency_code":"USD","in_stock":true},{"title":"None","offer_id":44786374639705,"sku":"PO 12-P W IDMAX B","price":379.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_W_IDMAX_Front.jpg?v=1788385502"},{"product_id":"performance-optimized-wedge-ported-12-enclosure-arc-audio-a-series-12","title":"Arc Audio A-Series 12 Ported 12\" Wedge Enclosure | Proline X","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 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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 Wedge 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003eA 3.76 inch twelve in a 6.88 inch top depth, vented at 31.5 Hz\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 31.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 35.9 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eSide slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Arc Audio A-Series 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\"\u003e1.18\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\"\u003e31.5\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\"\u003e35.9\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\"\u003e13.0\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 31.5 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe A-Series 12 is Arc's shallow twelve, 300 watts on 3.76 inches of mounting depth with a 25 Hz resonance, and the wedge gives it 1.18 cubic feet net vented at 31.5 Hz through a 13.0 square inch port. The cabinet is 30 inches wide, 15.5 tall, 6.88 inches at the top and 12.52 at the base.\u003c\/p\u003e\n  \u003cp\u003eA 0.61 Qts on 76 litres of Vas is a compliant driver and it graphs lively, 3.33 dB of anechoic ripple, with an F3 of 35.9 Hz. 31.5 Hz is the tuning that holds the in-car spread to 3.30 dB across 25 to 60 Hz. The port needs 23.47 of the 25.88 inches available and runs at 15.2 metres per second in the channel against a 17.9 limit, 8.7 at the mouth; this is the calmest port of the Arc wedges.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eTrunk-load wedge, explained\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThe 20 degree face is the seat side\u003c\/h4\u003e\n\u003cp\u003eA factory rear seat back\n    leans about 20 degrees off vertical. The wedge's raked rear panel matches that lean and tucks\n    against it, so the cabinet uses the triangle of trunk floor a square box wastes.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThe driver fires rearward\u003c\/h4\u003e\n\u003cp\u003eThe baffle stays vertical and faces\n    the trunk opening. The trunk acts as the acoustic extension into the cabin; nothing about\n    the driver is angled.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003e12.52 inches at the base, 6.88 at the top\u003c\/h4\u003e\n\u003cp\u003eThis is one of the few cabinets in the line where the magnet, not the port panel, sets the clearance floor, at 5.10 inches of top depth against 4.96 for the panel. The cabinet runs to 6.88 for airspace. 4.27 inches of flat floor stay clear in front of the panel.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003e30.00 inches wide\u003c\/h4\u003e\n\u003cp\u003eWidth is the wedge's free dimension and it\n    buys two things at once here: airspace, and port length, because the port runs the full\n    width of the box.\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 port is the product\u003c\/h3\u003e\n  \u003cp\u003eThe port is a triangular slot in the bottom-rear corner. The floor and the raked back wall\n  are two of its three sides; the third is a single panel bevelled to sit flush against both.\n  It runs across the cabinet, opens into the box at the far end and exits through the side\n  panel: a straight run with no bend, 23.47 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is an isosceles triangle with 5.25 inch legs, 13.0 square inches, running at\n  15.2 metres per second at the tuning frequency. The mouth is that same triangle cut through\n  the side panel with its three edges rounded over at 1\/2 inch, so the opening at the face is\n  22.5 square inches and air leaves it at 8.7 metres per second, against the 17.0 metre per\n  second threshold where a slot port starts to chuff. The panel's throat end carries a 3\/8 inch\n  roundover for the same reason.\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 cabinet\n    we build. It does not go in this one. Damping material changes the effective volume the\n    port is tuned against, which moves the tuning away from the 31.5 Hz the port was cut for.\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\u003eBelow tuning the port stops loading the cone and excursion climbs without limit toward DC,\n  so a 25 Hz high-pass at 24 dB per octave is part of the specification. Set it and the same\n  cabinet takes substantially more power for the same cone travel.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, the power at which the\n  cone reaches the end of its linear travel in this box. What the voice coil can dissipate as\n  heat is a separate ceiling set by Arc Audio.\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 10.910 inch cutout through a\n    double-layer 1.5 inch baffle, with a cosmetic front layer routed for the acrylic insert.\n    Threaded inserts at every mounting location.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eClearance\u003c\/h4\u003e\n\u003cp\u003e8 mm of travel, derated to 6.8 for the excursion check because Arc quote it at 70 percent BL, and the cone reaches 6.1 of that at 300 watts with the subsonic filter set. Run the filter. If the installation has the depth, the ARC 12 in this same line reads 1.93 dB in the car against this cabinet's 3.30. Displacement is from Arc directly; their manual publishes none.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eTwo windowed C braces run the cabinet profile at the third points of the width and seat on the port panel; the windows keep the cavity one chamber.\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 Langboard\n    Elite MDF, the shell folded from one strip with the sides dropped into dados and the port\n    panel seated in dados of its own.\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 A-Series 12 at 300 W RMS. Terminal cup is side mounted on the side opposite the port\n  mouth. A dual 2 ohm driver wired parallel presents 1 ohm, which many amplifiers are not\n  stable into; series at 4 ohm is the safe default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. Built to order in Tullahoma, Tennessee. The\n  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 A-Series 12. The alignment, the port geometry and the power\n  figures all come from Arc Audio's published parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Black","offer_id":44822254616665,"sku":"PO 12-P W A BB","price":399.99,"currency_code":"USD","in_stock":true},{"title":"None","offer_id":44822254649433,"sku":"PO 12-P W A B","price":379.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_W_A_Front.jpg?v=1788482125"},{"product_id":"performance-optimized-wedge-ported-12-enclosure-arc-audio-arc-12","title":"Arc Audio ARC 12 Ported 12\" Wedge Enclosure | Proline X","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 Wedge 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003eA 22.8 Hz motor vented at 31.5 Hz, 1.93 dB in the car\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.29 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 31.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 31.6 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eSide slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Arc Audio ARC 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\"\u003e1.29\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\"\u003e31.5\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\"\u003e31.6\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\"\u003e14.2\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 31.5 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe ARC 12 resonates at 22.8 Hz, the lowest Fs in this line, with 350 watts and 74 litres of Vas. The wedge gives it 1.29 cubic feet net vented at 31.5 Hz through a 14.2 square inch port, in a cabinet 30 inches wide, 15.5 tall, 7.50 inches at the top and 13.14 at the base.\u003c\/p\u003e\n  \u003cp\u003eA 0.42 Qts on that much compliance reaches low without a big box: F3 31.6 Hz anechoic on 1.96 dB of ripple, and 1.93 dB of in-car spread across 25 to 60 Hz at 31.5 Hz tuning, against 2.86 for the Down Fire version. The port needs 23.42 of the 25.77 inches available and runs at 18.9 metres per second in the channel against a 19.0 limit, 11.1 at the mouth.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eTrunk-load wedge, explained\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThe 20 degree face is the seat side\u003c\/h4\u003e\n\u003cp\u003eA factory rear seat back\n    leans about 20 degrees off vertical. The wedge's raked rear panel matches that lean and tucks\n    against it, so the cabinet uses the triangle of trunk floor a square box wastes.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThe driver fires rearward\u003c\/h4\u003e\n\u003cp\u003eThe baffle stays vertical and faces\n    the trunk opening. The trunk acts as the acoustic extension into the cabin; nothing about\n    the driver is angled.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003e13.14 inches at the base, 7.50 at the top\u003c\/h4\u003e\n\u003cp\u003eThe port panel and the magnet ask for nearly the same depth, 7.45 inches of top depth against 7.34, and the cabinet runs to 7.50. 4.64 inches of flat floor stay clear in front of the panel. The base is more than two inches under the height.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003e30.00 inches wide\u003c\/h4\u003e\n\u003cp\u003eWidth is the wedge's free dimension and it\n    buys two things at once here: airspace, and port length, because the port runs the full\n    width of the box.\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 port is the product\u003c\/h3\u003e\n  \u003cp\u003eThe port is a triangular slot in the bottom-rear corner. The floor and the raked back wall\n  are two of its three sides; the third is a single panel bevelled to sit flush against both.\n  It runs across the cabinet, opens into the box at the far end and exits through the side\n  panel: a straight run with no bend, 23.42 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is an isosceles triangle with 5.50 inch legs, 14.2 square inches, running at\n  18.9 metres per second at the tuning frequency. The mouth is that same triangle cut through\n  the side panel with its three edges rounded over at 1\/2 inch, so the opening at the face is\n  24.2 square inches and air leaves it at 11.1 metres per second, against the 17.0 metre per\n  second threshold where a slot port starts to chuff. The panel's throat end carries a 3\/8 inch\n  roundover for the same reason.\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 cabinet\n    we build. It does not go in this one. Damping material changes the effective volume the\n    port is tuned against, which moves the tuning away from the 31.5 Hz the port was cut for.\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\u003eBelow tuning the port stops loading the cone and excursion climbs without limit toward DC,\n  so a 25 Hz high-pass at 24 dB per octave is part of the specification. Set it and the same\n  cabinet takes substantially more power for the same cone travel.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, the power at which the\n  cone reaches the end of its linear travel in this box. What the voice coil can dissipate as\n  heat is a separate ceiling set by Arc Audio.\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 11.000 inch cutout through a\n    double-layer 1.5 inch baffle, with a cosmetic front layer routed for the acrylic insert.\n    Threaded inserts at every mounting location.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eClearance\u003c\/h4\u003e\n\u003cp\u003eSame disclosure as the ARC 10: Arc's printed 74.4 litres of Vas disagrees with their own Fs, Mms and Sd, which imply about 96. The printed figure is used. The channel runs a tenth under its turbulence limit at 350 watts, inside the rule with nothing spare. Xmax is derated from 16.0 to 13.6 mm and the cone uses 7.1 of it at rated power with the subsonic filter set. 6.00 inches of mounting depth clears the panel.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eTwo windowed C braces run the cabinet profile at the third points of the width and seat on the port panel; the windows keep the cavity one chamber.\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 Langboard\n    Elite MDF, the shell folded from one strip with the sides dropped into dados and the port\n    panel seated in dados of its own.\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 ARC 12 at 350 W RMS. Terminal cup is side mounted on the side opposite the port\n  mouth. A dual 2 ohm driver wired parallel presents 1 ohm, which many amplifiers are not\n  stable into; series at 4 ohm is the safe default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. Built to order in Tullahoma, Tennessee. The\n  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 ARC 12. The alignment, the port geometry and the power\n  figures all come from Arc Audio's published parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Black","offer_id":44822254714969,"sku":"PO 12-P W ARC BB","price":399.99,"currency_code":"USD","in_stock":true},{"title":"None","offer_id":44822254780505,"sku":"PO 12-P W ARC B","price":379.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_W_ARC_Front.jpg?v=1788482135"},{"product_id":"performance-optimized-wedge-ported-12-enclosure-arc-audio-sw-12","title":"Arc Audio SW 12 Ported 12\" Wedge Enclosure | Proline X","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 Wedge 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003eA 2.40 inch twelve with 400 watts, vented at 34 Hz in a 6.88 inch top depth\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 33.9 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eSide slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Arc Audio SW 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\"\u003e1.14\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\"\u003e33.9\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\"\u003e15.5\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 34.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe SW 12 puts 400 watts into 2.40 inches of mounting depth, the shallowest motor in this line, and the wedge stays shallow with it: 6.88 inches at the top, 12.52 at the base, 30 wide, 15.5 tall. 1.14 cubic feet net, vented at 34 Hz through a 15.5 square inch port.\u003c\/p\u003e\n  \u003cp\u003eArc publish sealed volumes only for the SW, 0.65 to 1.0 cubic feet, and no ported recommendation, so this alignment is ours. A 33.1 Hz motor with a 0.62 Qts tunes cleanly at 34 Hz: 1.28 dB of in-car spread across 25 to 60 Hz on 2.30 dB of anechoic ripple, with an F3 of 33.9 Hz. The port uses 25.14 of 25.66 inches of path and runs at 17.8 metres per second in the channel against a 19.3 limit, 10.7 at the mouth.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eTrunk-load wedge, explained\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThe 20 degree face is the seat side\u003c\/h4\u003e\n\u003cp\u003eA factory rear seat back\n    leans about 20 degrees off vertical. The wedge's raked rear panel matches that lean and tucks\n    against it, so the cabinet uses the triangle of trunk floor a square box wastes.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThe driver fires rearward\u003c\/h4\u003e\n\u003cp\u003eThe baffle stays vertical and faces\n    the trunk opening. The trunk acts as the acoustic extension into the cabin; nothing about\n    the driver is angled.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003e12.52 inches at the base, 6.88 at the top\u003c\/h4\u003e\n\u003cp\u003eNothing about a 2.40 inch motor sets the depth; the port panel would seat at 4.10 inches of top depth and the cabinet runs to 6.88 for airspace with the width at 30. 3.77 inches of flat floor stay clear in front of the panel.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003e30.00 inches wide\u003c\/h4\u003e\n\u003cp\u003eWidth is the wedge's free dimension and it\n    buys two things at once here: airspace, and port length, because the port runs the full\n    width of the box.\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 port is the product\u003c\/h3\u003e\n  \u003cp\u003eThe port is a triangular slot in the bottom-rear corner. The floor and the raked back wall\n  are two of its three sides; the third is a single panel bevelled to sit flush against both.\n  It runs across the cabinet, opens into the box at the far end and exits through the side\n  panel: a straight run with no bend, 25.14 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is an isosceles triangle with 5.75 inch legs, 15.5 square inches, running at\n  17.8 metres per second at the tuning frequency. The mouth is that same triangle cut through\n  the side panel with its three edges rounded over at 1\/2 inch, so the opening at the face is\n  25.9 square inches and air leaves it at 10.7 metres per second, against the 17.0 metre per\n  second threshold where a slot port starts to chuff. The panel's throat end carries a 3\/8 inch\n  roundover for the same reason.\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 cabinet\n    we build. It does not go in this one. Damping material changes the effective volume the\n    port is tuned against, which moves the tuning away from the 34.0 Hz the port was cut for.\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\u003eBelow tuning the port stops loading the cone and excursion climbs without limit toward DC,\n  so a 27 Hz high-pass at 24 dB per octave is part of the specification. Set it and the same\n  cabinet takes substantially more power for the same cone travel.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, the power at which the\n  cone reaches the end of its linear travel in this box. What the voice coil can dissipate as\n  heat is a separate ceiling set by Arc Audio.\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 11.000 inch cutout through a\n    double-layer 1.5 inch baffle, with a cosmetic front layer routed for the acrylic insert.\n    Threaded inserts at every mounting location.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eClearance\u003c\/h4\u003e\n\u003cp\u003eXmax is 15.5 mm one-way with no stated basis, derated to 13.2; the cone uses 5.4 of that at 400 watts with the subsonic filter set, so there is real reserve. The 0.042 cubic feet of displacement came from Arc directly. The published measurement is the D4; the D2 shares the frame and fits. We also build this driver as a 0.74 cubic foot sealed Down Fire.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eTwo windowed C braces run the cabinet profile at the third points of the width and seat on the port panel; the windows keep the cavity one chamber.\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 Langboard\n    Elite MDF, the shell folded from one strip with the sides dropped into dados and the port\n    panel seated in dados of its own.\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 SW 12 at 400 W RMS. Terminal cup is side mounted on the side opposite the port\n  mouth. A dual 2 ohm driver wired parallel presents 1 ohm, which many amplifiers are not\n  stable into; series at 4 ohm is the safe default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. Built to order in Tullahoma, Tennessee. The\n  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 SW 12. The alignment, the port geometry and the power\n  figures all come from Arc Audio's published parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Black","offer_id":44822254846041,"sku":"PO 12-P W SW BB","price":399.99,"currency_code":"USD","in_stock":true},{"title":"None","offer_id":44822254878809,"sku":"PO 12-P W SW B","price":379.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_W_SW_Front.jpg?v=1788482144"},{"product_id":"performance-optimized-wedge-ported-12-enclosure-arc-audio-x2v2-12","title":"Arc Audio X2V2 12 Ported 12\" Wedge Enclosure | Proline X","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 Wedge 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003eA 25.5 Hz motor vented at 30.5 Hz for a 1.09 dB in-car curve\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 30.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 33.6 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eSide 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\"\u003e1.48\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\"\u003e30.5\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\"\u003e33.6\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\"\u003e14.2\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 30.5 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe X2V2 12 is a 25.5 Hz motor with 79 litres of Vas rated at 250 watts, and the wedge gives it 1.48 cubic feet net vented at 30.5 Hz through a 14.2 square inch port. The cabinet is 29.5 inches wide, 15.5 tall, 8.25 inches at the top and 13.89 at the base.\u003c\/p\u003e\n  \u003cp\u003eA 0.47 Qts on that much compliance rolls off gently, so the anechoic F3 reads 33.6 Hz while the in-car curve spreads only 1.09 dB across 25 to 60 Hz at 30.5 Hz tuning, on 1.63 dB of ripple. The port needs 21.54 of the 25.27 inches available and runs at 16.0 metres per second in the channel against a 16.6 limit, 9.4 at the mouth.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eTrunk-load wedge, explained\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThe 20 degree face is the seat side\u003c\/h4\u003e\n\u003cp\u003eA factory rear seat back\n    leans about 20 degrees off vertical. The wedge's raked rear panel matches that lean and tucks\n    against it, so the cabinet uses the triangle of trunk floor a square box wastes.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThe driver fires rearward\u003c\/h4\u003e\n\u003cp\u003eThe baffle stays vertical and faces\n    the trunk opening. The trunk acts as the acoustic extension into the cabin; nothing about\n    the driver is angled.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003e13.89 inches at the base, 8.25 at the top\u003c\/h4\u003e\n\u003cp\u003eThe port panel and the magnet ask for nearly the same depth, 8.20 inches of top depth against 8.09, and the solver rounds to 8.25. 5.39 inches of flat floor stay clear in front of the panel. The base is over an inch and a half under the height.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003e29.50 inches wide\u003c\/h4\u003e\n\u003cp\u003eWidth is the wedge's free dimension and it\n    buys two things at once here: airspace, and port length, because the port runs the full\n    width of the box.\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 port is the product\u003c\/h3\u003e\n  \u003cp\u003eThe port is a triangular slot in the bottom-rear corner. The floor and the raked back wall\n  are two of its three sides; the third is a single panel bevelled to sit flush against both.\n  It runs across the cabinet, opens into the box at the far end and exits through the side\n  panel: a straight run with no bend, 21.54 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is an isosceles triangle with 5.50 inch legs, 14.2 square inches, running at\n  16.0 metres per second at the tuning frequency. The mouth is that same triangle cut through\n  the side panel with its three edges rounded over at 1\/2 inch, so the opening at the face is\n  24.2 square inches and air leaves it at 9.4 metres per second, against the 17.0 metre per\n  second threshold where a slot port starts to chuff. The panel's throat end carries a 3\/8 inch\n  roundover for the same reason.\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 cabinet\n    we build. It does not go in this one. Damping material changes the effective volume the\n    port is tuned against, which moves the tuning away from the 30.5 Hz the port was cut for.\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\u003eBelow tuning the port stops loading the cone and excursion climbs without limit toward DC,\n  so a 24 Hz high-pass at 24 dB per octave is part of the specification. Set it and the same\n  cabinet takes substantially more power for the same cone travel.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, the power at which the\n  cone reaches the end of its linear travel in this box. What the voice coil can dissipate as\n  heat is a separate ceiling set by Arc Audio.\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 through a\n    double-layer 1.5 inch baffle, with a cosmetic front layer routed for the acrylic insert.\n    Threaded inserts at every mounting location.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eClearance\u003c\/h4\u003e\n\u003cp\u003eArc rate the X2V2 at 250 watts RMS, modest for a twelve of this size, and that is the constraint worth knowing: 1.48 cubic feet is a lot of cabinet for 250 watts, built for quality of response rather than output. Xmax is published geometrically at 15.1 mm and the cone uses 5.6 of it at rated power with the subsonic filter set. 6.75 inches of mounting depth clears the panel. Arc's recommended sealed box is 1.50 cubic feet gross.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eTwo windowed C braces run the cabinet profile at the third points of the width and seat on the port panel; the windows keep the cavity one chamber.\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 Langboard\n    Elite MDF, the shell folded from one strip with the sides dropped into dados and the port\n    panel seated in dados of its own.\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 on the side opposite the port\n  mouth. A dual 2 ohm driver wired parallel presents 1 ohm, which many amplifiers are not\n  stable into; series at 4 ohm is the safe default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. Built to order in Tullahoma, Tennessee. The\n  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. The alignment, the port geometry and the power\n  figures all come from Arc Audio's published parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Black","offer_id":44822254944345,"sku":"PO 12-P W X2V2 BB","price":399.99,"currency_code":"USD","in_stock":true},{"title":"None","offer_id":44822254977113,"sku":"PO 12-P W X2V2 B","price":379.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_W_X2V2_Front.jpg?v=1788482154"},{"product_id":"performance-optimized-wedge-ported-12-enclosure-image-dynamics-idq12-v4","title":"Image Dynamics IDQ12 V4 Ported 12\" Wedge Enclosure | Proline X","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 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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 Wedge 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003e1.97 cubic feet vented at 34 Hz, the largest cabinet in the line, 1.01 dB in the car\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.97 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 34.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 32.7 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eSide 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\"\u003e1.97\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\"\u003e32.7\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\"\u003e18.4\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 34.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe IDQ12 V4 is a 35 Hz motor with a 0.74 Qts and 375 watts, and it gets the largest cabinet in this line: 1.97 cubic feet net vented at 34 Hz through an 18.4 square inch port, 30 inches wide, 15.5 tall, 10.50 inches at the top and 16.14 at the base.\u003c\/p\u003e\n  \u003cp\u003eA 0.74 Qts on 47 litres wants volume and rewards it: 1.01 dB of in-car spread across 25 to 60 Hz on 3.00 dB of anechoic ripple, with an F3 of 32.7 Hz against 37.7 for the Down Fire version of the same driver. The port needs only 15.64 of the 25.43 inches available and runs at 19.3 metres per second in the channel, exactly at its limit for a port this size, 12.0 at the mouth.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eTrunk-load wedge, explained\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThe 20 degree face is the seat side\u003c\/h4\u003e\n\u003cp\u003eA factory rear seat back\n    leans about 20 degrees off vertical. The wedge's raked rear panel matches that lean and tucks\n    against it, so the cabinet uses the triangle of trunk floor a square box wastes.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThe driver fires rearward\u003c\/h4\u003e\n\u003cp\u003eThe baffle stays vertical and faces\n    the trunk opening. The trunk acts as the acoustic extension into the cabin; nothing about\n    the driver is angled.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003e16.14 inches at the base, 10.50 at the top\u003c\/h4\u003e\n\u003cp\u003eThe base is 16.14 inches, over our 16 inch comfort line and under the 18 inch limit, and deeper than the cabinet is tall; that depth is airspace, since the port panel would clear the motor at 7.97 inches of top depth and the cabinet runs to 10.50 for volume with the width at 30. 6.89 inches of flat floor stay clear in front of the panel. Measure the trunk floor before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003e30.00 inches wide\u003c\/h4\u003e\n\u003cp\u003eWidth is the wedge's free dimension and it\n    buys two things at once here: airspace, and port length, because the port runs the full\n    width of the box.\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 port is the product\u003c\/h3\u003e\n  \u003cp\u003eThe port is a triangular slot in the bottom-rear corner. The floor and the raked back wall\n  are two of its three sides; the third is a single panel bevelled to sit flush against both.\n  It runs across the cabinet, opens into the box at the far end and exits through the side\n  panel: a straight run with no bend, 15.64 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is an isosceles triangle with 6.25 inch legs, 18.4 square inches, running at\n  19.3 metres per second at the tuning frequency. The mouth is that same triangle cut through\n  the side panel with its three edges rounded over at 1\/2 inch, so the opening at the face is\n  29.5 square inches and air leaves it at 12.0 metres per second, against the 17.0 metre per\n  second threshold where a slot port starts to chuff. The panel's throat end carries a 3\/8 inch\n  roundover for the same reason.\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 cabinet\n    we build. It does not go in this one. Damping material changes the effective volume the\n    port is tuned against, which moves the tuning away from the 34.0 Hz the port was cut for.\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\u003eBelow tuning the port stops loading the cone and excursion climbs without limit toward DC,\n  so a 27 Hz high-pass at 24 dB per octave is part of the specification. Set it and the same\n  cabinet takes substantially more power for the same cone travel.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, the power at which the\n  cone reaches the end of its linear travel in this box. What the voice coil can dissipate as\n  heat is a separate ceiling set by Image Dynamics.\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 through a\n    double-layer 1.5 inch baffle, with a cosmetic front layer routed for the acrylic insert.\n    Threaded inserts at every mounting location.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eClearance\u003c\/h4\u003e\n\u003cp\u003eThe channel runs at its turbulence limit, 19.3 against 19.3; inside the rule with nothing spare. The cone uses 7.5 of its 14.5 mm at 375 watts with the subsonic filter set. 5.77 inches of mounting depth clears the panel. We also build this driver as a 1.40 cubic foot sealed wedge, and the graphs tab compares the two.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eTwo windowed C braces run the cabinet profile at the third points of the width and seat on the port panel; the windows keep the cavity one chamber.\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 Langboard\n    Elite MDF, the shell folded from one strip with the sides dropped into dados and the port\n    panel seated in dados of its own.\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 on the side opposite the port\n  mouth. A dual 2 ohm driver wired parallel presents 1 ohm, which many amplifiers are not\n  stable into; series at 4 ohm is the safe default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. Built to order in Tullahoma, Tennessee. The\n  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. The alignment, the port geometry and the power\n  figures all come from Image Dynamics's published parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Black","offer_id":44822255009881,"sku":"PO 12-P W IDQ BB","price":399.99,"currency_code":"USD","in_stock":true},{"title":"None","offer_id":44822255108185,"sku":"PO 12-P W IDQ B","price":379.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_W_IDQ_Front.jpg?v=1788423831"},{"product_id":"performance-optimized-wedge-ported-12-enclosure-image-dynamics-id12-v4","title":"Image Dynamics ID12 V4 Ported 12\" Wedge Enclosure | Proline X","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 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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 Wedge 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003eA 45 Hz motor vented at 35 Hz in 1.28 cubic feet, the flat and tight twelve\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 38.1 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eSide 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\"\u003e1.28\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\"\u003e38.1\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\"\u003e15.5\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 35.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe ID12 V4 resonates at 45 Hz on a 0.79 Qts, which sets a floor on what any cabinet can do with it, and the wedge builds to that honestly: 1.28 cubic feet net vented at 35 Hz through a 15.5 square inch port, 30 inches wide, 15.5 tall, 7.62 inches at the top and 13.27 at the base. Image Dynamics' own ported recommendation is 1.5 cubic feet with a 3 inch round port; this cabinet gives the driver twice that port area.\u003c\/p\u003e\n  \u003cp\u003eAn F3 of 38.1 Hz is the honest consequence of a 45 Hz motor and no alignment argues with it. What 35 Hz tuning buys is control: 1.67 dB of anechoic ripple and 2.56 dB of in-car spread across 25 to 60 Hz. If low extension is what you want, the ID10 in this series reaches 32.7 Hz. The port needs 20.55 of the 25.66 inches available and runs at 16.6 metres per second in the channel against a 17.9 limit, 9.9 at the mouth.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eTrunk-load wedge, explained\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThe 20 degree face is the seat side\u003c\/h4\u003e\n\u003cp\u003eA factory rear seat back\n    leans about 20 degrees off vertical. The wedge's raked rear panel matches that lean and tucks\n    against it, so the cabinet uses the triangle of trunk floor a square box wastes.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThe driver fires rearward\u003c\/h4\u003e\n\u003cp\u003eThe baffle stays vertical and faces\n    the trunk opening. The trunk acts as the acoustic extension into the cabin; nothing about\n    the driver is angled.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003e13.27 inches at the base, 7.62 at the top\u003c\/h4\u003e\n\u003cp\u003eThe port panel and the magnet ask for nearly the same depth, 7.37 inches of top depth against 7.01, and the cabinet runs to 7.62. 4.52 inches of flat floor stay clear in front of the panel. The base is more than two inches under the height.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003e30.00 inches wide\u003c\/h4\u003e\n\u003cp\u003eWidth is the wedge's free dimension and it\n    buys two things at once here: airspace, and port length, because the port runs the full\n    width of the box.\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 port is the product\u003c\/h3\u003e\n  \u003cp\u003eThe port is a triangular slot in the bottom-rear corner. The floor and the raked back wall\n  are two of its three sides; the third is a single panel bevelled to sit flush against both.\n  It runs across the cabinet, opens into the box at the far end and exits through the side\n  panel: a straight run with no bend, 20.55 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is an isosceles triangle with 5.75 inch legs, 15.5 square inches, running at\n  16.6 metres per second at the tuning frequency. The mouth is that same triangle cut through\n  the side panel with its three edges rounded over at 1\/2 inch, so the opening at the face is\n  25.9 square inches and air leaves it at 9.9 metres per second, against the 17.0 metre per\n  second threshold where a slot port starts to chuff. The panel's throat end carries a 3\/8 inch\n  roundover for the same reason.\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 cabinet\n    we build. It does not go in this one. Damping material changes the effective volume the\n    port is tuned against, which moves the tuning away from the 35.0 Hz the port was cut for.\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\u003eBelow tuning the port stops loading the cone and excursion climbs without limit toward DC,\n  so a 28 Hz high-pass at 24 dB per octave is part of the specification. Set it and the same\n  cabinet takes substantially more power for the same cone travel.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, the power at which the\n  cone reaches the end of its linear travel in this box. What the voice coil can dissipate as\n  heat is a separate ceiling set by Image Dynamics.\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 through a\n    double-layer 1.5 inch baffle, with a cosmetic front layer routed for the acrylic insert.\n    Threaded inserts at every mounting location.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eClearance\u003c\/h4\u003e\n\u003cp\u003e250 watts, and the cone uses only 5.2 of its 14.0 mm at that power with the subsonic filter set: this driver is thermally limited long before it is mechanically limited. 5.67 inches of mounting depth clears the panel. We do not build a sealed box for the ID12 V4 and Image Dynamics publish no sealed volume for it, so the graphs tab carries no sealed comparison.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eTwo windowed C braces run the cabinet profile at the third points of the width and seat on the port panel; the windows keep the cavity one chamber.\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 Langboard\n    Elite MDF, the shell folded from one strip with the sides dropped into dados and the port\n    panel seated in dados of its own.\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 on the side opposite the port\n  mouth. A dual 2 ohm driver wired parallel presents 1 ohm, which many amplifiers are not\n  stable into; series at 4 ohm is the safe default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. Built to order in Tullahoma, Tennessee. The\n  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. The alignment, the port geometry and the power\n  figures all come from Image Dynamics's published parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Black","offer_id":44822255140953,"sku":"PO 12-P W IDv4 BB","price":399.99,"currency_code":"USD","in_stock":true},{"title":"None","offer_id":44822255173721,"sku":"PO 12-P W IDv4 B","price":379.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_W_IDv4_Front.jpg?v=1788423844"},{"product_id":"performance-optimized-wedge-ported-12-enclosure-image-dynamics-idqs12","title":"Image Dynamics IDQS12 Ported 12\" Wedge Enclosure | Proline X","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 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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 Wedge 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003eA 3.50 inch shallow twelve vented at 36 Hz, the flat one\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 36.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 37.7 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eSide 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\"\u003e1.44\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\"\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\"\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\"\u003e16.9\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 36.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe IDQS12 puts a 45 Hz resonance and 250 watts into 3.50 inches of mounting depth, and the wedge gives it 1.44 cubic feet net vented at 36 Hz through a 16.9 square inch port. The cabinet is 30 inches wide, 15.5 tall, 7.75 inches at the top and 13.39 at the base.\u003c\/p\u003e\n  \u003cp\u003eAn F3 of 37.7 Hz is a 45 Hz free-air resonance being honest about itself; the IDQ12 in this line reaches 32.7 Hz if that is what you want. What this cabinet does is graph cleanly: 1.91 dB of anechoic ripple and 2.64 dB of in-car spread across 25 to 60 Hz at 36 Hz tuning. The port needs 18.43 of the 25.55 inches available and runs at 17.2 metres per second in the channel against a 19.0 limit, 10.5 at the mouth.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eTrunk-load wedge, explained\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThe 20 degree face is the seat side\u003c\/h4\u003e\n\u003cp\u003eA factory rear seat back\n    leans about 20 degrees off vertical. The wedge's raked rear panel matches that lean and tucks\n    against it, so the cabinet uses the triangle of trunk floor a square box wastes.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThe driver fires rearward\u003c\/h4\u003e\n\u003cp\u003eThe baffle stays vertical and faces\n    the trunk opening. The trunk acts as the acoustic extension into the cabin; nothing about\n    the driver is angled.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003e13.39 inches at the base, 7.75 at the top\u003c\/h4\u003e\n\u003cp\u003eNothing about a 3.50 inch motor sets the depth; the port panel would seat at 5.45 inches of top depth and the cabinet runs to 7.75 for airspace with the width at 30. 4.39 inches of flat floor stay clear in front of the panel. The base is two inches under the height.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003e30.00 inches wide\u003c\/h4\u003e\n\u003cp\u003eWidth is the wedge's free dimension and it\n    buys two things at once here: airspace, and port length, because the port runs the full\n    width of the box.\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 port is the product\u003c\/h3\u003e\n  \u003cp\u003eThe port is a triangular slot in the bottom-rear corner. The floor and the raked back wall\n  are two of its three sides; the third is a single panel bevelled to sit flush against both.\n  It runs across the cabinet, opens into the box at the far end and exits through the side\n  panel: a straight run with no bend, 18.43 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is an isosceles triangle with 6.00 inch legs, 16.9 square inches, running at\n  17.2 metres per second at the tuning frequency. The mouth is that same triangle cut through\n  the side panel with its three edges rounded over at 1\/2 inch, so the opening at the face is\n  27.7 square inches and air leaves it at 10.5 metres per second, against the 17.0 metre per\n  second threshold where a slot port starts to chuff. The panel's throat end carries a 3\/8 inch\n  roundover for the same reason.\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 cabinet\n    we build. It does not go in this one. Damping material changes the effective volume the\n    port is tuned against, which moves the tuning away from the 36.0 Hz the port was cut for.\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\u003eBelow tuning the port stops loading the cone and excursion climbs without limit toward DC,\n  so a 28 Hz high-pass at 24 dB per octave is part of the specification. Set it and the same\n  cabinet takes substantially more power for the same cone travel.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, the power at which the\n  cone reaches the end of its linear travel in this box. What the voice coil can dissipate as\n  heat is a separate ceiling set by Image Dynamics.\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 through a\n    double-layer 1.5 inch baffle, with a cosmetic front layer routed for the acrylic insert.\n    Threaded inserts at every mounting location.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eClearance\u003c\/h4\u003e\n\u003cp\u003e7.5 mm of one-way travel is the lowest in the Image Dynamics range, and the cone uses 5.6 of it at 250 watts with the subsonic filter set; run the filter. 3.50 inches of mounting depth clears the panel by a wide margin. We do not build a sealed box for the IDQS12 and Image Dynamics publish no sealed volume for it, so the graphs tab carries no sealed comparison.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eTwo windowed C braces run the cabinet profile at the third points of the width and seat on the port panel; the windows keep the cavity one chamber.\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 Langboard\n    Elite MDF, the shell folded from one strip with the sides dropped into dados and the port\n    panel seated in dados of its own.\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 on the side opposite the port\n  mouth. A dual 2 ohm driver wired parallel presents 1 ohm, which many amplifiers are not\n  stable into; series at 4 ohm is the safe default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. Built to order in Tullahoma, Tennessee. The\n  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. The alignment, the port geometry and the power\n  figures all come from Image Dynamics's published parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Black","offer_id":44822255829081,"sku":"PO 12-P W IDQS BB","price":399.99,"currency_code":"USD","in_stock":true},{"title":"None","offer_id":44822255992921,"sku":"PO 12-P W IDQS B","price":379.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_W_IDQS_Front.jpg?v=1788423858"},{"product_id":"performance-optimized-wedge-ported-12-enclosure-jl-audio-12tw1","title":"JL Audio 12TW1 Ported 12\" Wedge Enclosure | Proline X","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 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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 Wedge 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003eA 4.61 inch twelve in a 6.62 inch top depth, vented at 33.5 Hz\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 33.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 33.8 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eSide slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the JL Audio 12TW1\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\"\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\"\u003e33.8\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\"\u003e14.2\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 33.5 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe 12TW1 is JL's thin twelve, 300 watts on 4.61 inches of mounting depth, and the wedge built around it is the shallowest twelve in this line: 6.62 inches at the top, 12.27 at the base, 30 inches wide and 15.5 tall. 1.07 cubic feet net, vented at 33.5 Hz through a 14.2 square inch port.\u003c\/p\u003e\n  \u003cp\u003eA 32.4 Hz motor with a 0.53 Qts on 33.7 litres tunes cleanly a little above its resonance. 33.5 Hz gives 1.36 dB of in-car spread across 25 to 60 Hz on 1.43 dB of anechoic ripple, with an F3 of 33.8 Hz; the Down Fire version of the same driver reads 2.64 dB in the car. The port uses 25.26 of 25.77 inches of path and runs at 17.8 metres per second in the channel against an 18.2 limit, 10.5 at the mouth.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eTrunk-load wedge, explained\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThe 20 degree face is the seat side\u003c\/h4\u003e\n\u003cp\u003eA factory rear seat back\n    leans about 20 degrees off vertical. The wedge's raked rear panel matches that lean and tucks\n    against it, so the cabinet uses the triangle of trunk floor a square box wastes.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThe driver fires rearward\u003c\/h4\u003e\n\u003cp\u003eThe baffle stays vertical and faces\n    the trunk opening. The trunk acts as the acoustic extension into the cabin; nothing about\n    the driver is angled.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003e12.27 inches at the base, 6.62 at the top\u003c\/h4\u003e\n\u003cp\u003eThe port panel and the magnet ask for almost the same depth here, 6.05 inches against 5.95, and the panel figure wins by a tenth. 3.77 inches of flat floor stay clear in front of it. The base is well under the height; this is a low cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003e30.00 inches wide\u003c\/h4\u003e\n\u003cp\u003eWidth is the wedge's free dimension and it\n    buys two things at once here: airspace, and port length, because the port runs the full\n    width of the box.\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 port is the product\u003c\/h3\u003e\n  \u003cp\u003eThe port is a triangular slot in the bottom-rear corner. The floor and the raked back wall\n  are two of its three sides; the third is a single panel bevelled to sit flush against both.\n  It runs across the cabinet, opens into the box at the far end and exits through the side\n  panel: a straight run with no bend, 25.26 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is an isosceles triangle with 5.50 inch legs, 14.2 square inches, running at\n  17.8 metres per second at the tuning frequency. The mouth is that same triangle cut through\n  the side panel with its three edges rounded over at 1\/2 inch, so the opening at the face is\n  24.2 square inches and air leaves it at 10.5 metres per second, against the 17.0 metre per\n  second threshold where a slot port starts to chuff. The panel's throat end carries a 3\/8 inch\n  roundover for the same reason.\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 cabinet\n    we build. It does not go in this one. Damping material changes the effective volume the\n    port is tuned against, which moves the tuning away from the 33.5 Hz the port was cut for.\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\u003eBelow tuning the port stops loading the cone and excursion climbs without limit toward DC,\n  so a 26 Hz high-pass at 24 dB per octave is part of the specification. Set it and the same\n  cabinet takes substantially more power for the same cone travel.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, the power at which the\n  cone reaches the end of its linear travel in this box. What the voice coil can dissipate as\n  heat is a separate ceiling set by JL Audio.\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 11.063 inch cutout through a\n    double-layer 1.5 inch baffle, with a cosmetic front layer routed for the acrylic insert.\n    Threaded inserts at every mounting location.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eClearance\u003c\/h4\u003e\n\u003cp\u003e10.0 mm of one-way travel and 300 watts. The cone uses 6.1 mm at rated power with the subsonic filter set, so there is reserve, but this is not the twelve for output; the 12W3v3 takes 500 watts in a cabinet two inches deeper. 4.61 inches of mounting depth clears the panel by a wide margin. JL's recommended sealed box is 0.65 cubic feet.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eTwo windowed C braces run the cabinet profile at the third points of the width and seat on the port panel; the windows keep the cavity one chamber.\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 Langboard\n    Elite MDF, the shell folded from one strip with the sides dropped into dados and the port\n    panel seated in dados of its own.\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 12TW1 at 300 W RMS. Terminal cup is side mounted on the side opposite the port\n  mouth. A dual 2 ohm driver wired parallel presents 1 ohm, which many amplifiers are not\n  stable into; series at 4 ohm is the safe default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. Built to order in Tullahoma, Tennessee. The\n  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 12TW1. The alignment, the port geometry and the power\n  figures all come from JL Audio's published parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Black","offer_id":44822256255065,"sku":"PO 12-P W TW1 BB","price":399.99,"currency_code":"USD","in_stock":true},{"title":"None","offer_id":44822256287833,"sku":"PO 12-P W TW1 B","price":379.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_W_TW1_Front.jpg?v=1788423872"},{"product_id":"performance-optimized-wedge-ported-12-enclosure-jl-audio-12tw3","title":"JL Audio 12TW3 Ported 12\" Shallow Sub Wedge Enclosure | Proline X","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 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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 Wedge 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003eA 26.5 Hz motor 3.5 inches deep, vented at 32.5 Hz in a 6.75 inch top depth\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.15 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 32.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 32.1 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eSide 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\"\u003e1.15\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\"\u003e32.1\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\"\u003e14.2\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 32.5 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe 12TW3 puts a 26.5 Hz resonance and 400 watts into 3.50 inches of mounting depth, and the wedge keeps the cabinet as shallow as the driver: 6.75 inches at the top, 12.39 at the base, 30 wide, 15.5 tall. 1.15 cubic feet net, vented at 32.5 Hz through a 14.2 square inch port.\u003c\/p\u003e\n  \u003cp\u003e48.7 litres of Vas on a shallow motor is a compliant driver, and it graphs livelier than a deep one: 2.64 dB of anechoic ripple here, the widest of the JL twelves. 32.5 Hz is the tuning that turns that into 1.59 dB of in-car spread across 25 to 60 Hz with an F3 of 32.1 Hz. The port takes 25.03 of 25.77 inches of path and runs at 19.6 metres per second in the channel against a 19.7 limit, 11.5 at the mouth.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eTrunk-load wedge, explained\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThe 20 degree face is the seat side\u003c\/h4\u003e\n\u003cp\u003eA factory rear seat back\n    leans about 20 degrees off vertical. The wedge's raked rear panel matches that lean and tucks\n    against it, so the cabinet uses the triangle of trunk floor a square box wastes.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThe driver fires rearward\u003c\/h4\u003e\n\u003cp\u003eThe baffle stays vertical and faces\n    the trunk opening. The trunk acts as the acoustic extension into the cabin; nothing about\n    the driver is angled.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003e12.39 inches at the base, 6.75 at the top\u003c\/h4\u003e\n\u003cp\u003eAt 3.50 inches of mounting depth the magnet is not what sets the depth; the port panel is, at 4.95 inches of top depth against 4.84. The cabinet then runs to 6.75 at the top for volume, with 3.89 inches of flat floor clear in front of the panel.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003e30.00 inches wide\u003c\/h4\u003e\n\u003cp\u003eWidth is the wedge's free dimension and it\n    buys two things at once here: airspace, and port length, because the port runs the full\n    width of the box.\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 port is the product\u003c\/h3\u003e\n  \u003cp\u003eThe port is a triangular slot in the bottom-rear corner. The floor and the raked back wall\n  are two of its three sides; the third is a single panel bevelled to sit flush against both.\n  It runs across the cabinet, opens into the box at the far end and exits through the side\n  panel: a straight run with no bend, 25.03 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is an isosceles triangle with 5.50 inch legs, 14.2 square inches, running at\n  19.6 metres per second at the tuning frequency. The mouth is that same triangle cut through\n  the side panel with its three edges rounded over at 1\/2 inch, so the opening at the face is\n  24.2 square inches and air leaves it at 11.5 metres per second, against the 17.0 metre per\n  second threshold where a slot port starts to chuff. The panel's throat end carries a 3\/8 inch\n  roundover for the same reason.\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 cabinet\n    we build. It does not go in this one. Damping material changes the effective volume the\n    port is tuned against, which moves the tuning away from the 32.5 Hz the port was cut for.\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\u003eBelow tuning the port stops loading the cone and excursion climbs without limit toward DC,\n  so a 26 Hz high-pass at 24 dB per octave is part of the specification. Set it and the same\n  cabinet takes substantially more power for the same cone travel.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, the power at which the\n  cone reaches the end of its linear travel in this box. What the voice coil can dissipate as\n  heat is a separate ceiling set by JL Audio.\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 through a\n    double-layer 1.5 inch baffle, with a cosmetic front layer routed for the acrylic insert.\n    Threaded inserts at every mounting location.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eClearance\u003c\/h4\u003e\n\u003cp\u003eJL quote Xmax on a coil overhang basis, so the alignment is built against a derated 14.4 mm rather than the printed 15.2; the cone uses 5.8 mm at 400 watts with the subsonic filter set. The channel sits a tenth under its turbulence limit. We also build this driver as a 0.80 cubic foot sealed Down Fire, and the graphs tab compares the two.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eTwo windowed C braces run the cabinet profile at the third points of the width and seat on the port panel; the windows keep the cavity one chamber.\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 Langboard\n    Elite MDF, the shell folded from one strip with the sides dropped into dados and the port\n    panel seated in dados of its own.\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 on the side opposite the port\n  mouth. A dual 2 ohm driver wired parallel presents 1 ohm, which many amplifiers are not\n  stable into; series at 4 ohm is the safe default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. Built to order in Tullahoma, Tennessee. The\n  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. The alignment, the port geometry and the power\n  figures all come from JL Audio's published parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Black","offer_id":44822256320601,"sku":"PO 12-P W TW3 BB","price":399.99,"currency_code":"USD","in_stock":true},{"title":"None","offer_id":44822256353369,"sku":"PO 12-P W TW3 B","price":379.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_W_TW3_Front.jpg?v=1788423885"},{"product_id":"performance-optimized-wedge-ported-12-enclosure-jl-audio-12w0v3","title":"JL Audio 12W0v3 Ported 12\" Wedge Enclosure | Proline X","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 Wedge 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003eThe flattest in-car twelve in the JL wedges: 1.76 cubic feet vented at 30 Hz\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.76 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 30.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 33.1 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eSide slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the JL Audio 12W0v3\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\"\u003e1.76\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\"\u003e30.0\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\"\u003e33.1\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\"\u003e16.9\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 30.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe 12W0v3 is JL's entry twelve, 300 watts on a 28.4 Hz motor with 71.6 litres of Vas, and that Vas is why it gets the biggest JL cabinet in this line: 1.76 cubic feet net, vented at 30 Hz through a 16.9 square inch port, 30 inches wide, 15.5 tall, 9.62 inches at the top and 15.27 at the base.\u003c\/p\u003e\n  \u003cp\u003eA 0.67 Qts on that much compliance wants volume, and given it the driver graphs flatter in a car than anything else in this brand's range: 0.77 dB of spread across 25 to 60 Hz at 30 Hz tuning, on 3.00 dB of anechoic ripple with an F3 of 33.1 Hz. The F3 reads high next to the tuning because a 0.67 Qts rolls off gently; the response below it stays usable. The port needs only 21.92 of the 25.55 inches available and runs at 15.1 metres per second in the channel, 9.2 at the mouth.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eTrunk-load wedge, explained\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThe 20 degree face is the seat side\u003c\/h4\u003e\n\u003cp\u003eA factory rear seat back\n    leans about 20 degrees off vertical. The wedge's raked rear panel matches that lean and tucks\n    against it, so the cabinet uses the triangle of trunk floor a square box wastes.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThe driver fires rearward\u003c\/h4\u003e\n\u003cp\u003eThe baffle stays vertical and faces\n    the trunk opening. The trunk acts as the acoustic extension into the cabin; nothing about\n    the driver is angled.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003e15.27 inches at the base, 9.62 at the top\u003c\/h4\u003e\n\u003cp\u003eDepth here buys airspace, not clearance: the port panel would clear the motor at 7.34 inches of top depth and the cabinet runs to 9.62 because 1.76 cubic feet has to come from somewhere once the width is at 30. 6.27 inches of flat floor stay clear in front of the panel. The base is under the height.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003e30.00 inches wide\u003c\/h4\u003e\n\u003cp\u003eWidth is the wedge's free dimension and it\n    buys two things at once here: airspace, and port length, because the port runs the full\n    width of the box.\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 port is the product\u003c\/h3\u003e\n  \u003cp\u003eThe port is a triangular slot in the bottom-rear corner. The floor and the raked back wall\n  are two of its three sides; the third is a single panel bevelled to sit flush against both.\n  It runs across the cabinet, opens into the box at the far end and exits through the side\n  panel: a straight run with no bend, 21.92 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is an isosceles triangle with 6.00 inch legs, 16.9 square inches, running at\n  15.1 metres per second at the tuning frequency. The mouth is that same triangle cut through\n  the side panel with its three edges rounded over at 1\/2 inch, so the opening at the face is\n  27.7 square inches and air leaves it at 9.2 metres per second, against the 17.0 metre per\n  second threshold where a slot port starts to chuff. The panel's throat end carries a 3\/8 inch\n  roundover for the same reason.\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 cabinet\n    we build. It does not go in this one. Damping material changes the effective volume the\n    port is tuned against, which moves the tuning away from the 30.0 Hz the port was cut for.\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\u003eBelow tuning the port stops loading the cone and excursion climbs without limit toward DC,\n  so a 24 Hz high-pass at 24 dB per octave is part of the specification. Set it and the same\n  cabinet takes substantially more power for the same cone travel.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, the power at which the\n  cone reaches the end of its linear travel in this box. What the voice coil can dissipate as\n  heat is a separate ceiling set by JL Audio.\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 11.063 inch cutout through a\n    double-layer 1.5 inch baffle, with a cosmetic front layer routed for the acrylic insert.\n    Threaded inserts at every mounting location.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eClearance\u003c\/h4\u003e\n\u003cp\u003e300 watts and 11.4 mm of travel, and the cone uses 7.9 of those millimetres at rated power with the subsonic filter set. Power is the harder limit. 5.39 inches of mounting depth clears the panel by more than two inches. JL's recommended sealed box is 1.38 cubic feet and the graphs tab compares against it.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eTwo windowed C braces run the cabinet profile at the third points of the width and seat on the port panel; the windows keep the cavity one chamber.\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 Langboard\n    Elite MDF, the shell folded from one strip with the sides dropped into dados and the port\n    panel seated in dados of its own.\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 12W0v3 at 300 W RMS. Terminal cup is side mounted on the side opposite the port\n  mouth. A dual 2 ohm driver wired parallel presents 1 ohm, which many amplifiers are not\n  stable into; series at 4 ohm is the safe default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. Built to order in Tullahoma, Tennessee. The\n  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 12W0v3. The alignment, the port geometry and the power\n  figures all come from JL Audio's published parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Black","offer_id":44822256386137,"sku":"PO 12-P W W0V3 BB","price":399.99,"currency_code":"USD","in_stock":true},{"title":"None","offer_id":44822256451673,"sku":"PO 12-P W W0V3 B","price":379.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_W_W0V3_Front.jpg?v=1788423899"},{"product_id":"performance-optimized-wedge-ported-12-enclosure-jl-audio-12w1v3","title":"JL Audio 12W1v3 Ported 12\" Wedge Enclosure | Proline X","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 Wedge 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003eA 26.6 Hz motor vented at 30.5 Hz for a 0.78 dB in-car curve\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 30.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 34.3 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eSide slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the JL Audio 12W1v3\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\"\u003e30.5\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\"\u003e34.3\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\"\u003e15.5\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 30.5 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe 12W1v3 is 300 watts on a 26.6 Hz resonance with 72 litres of Vas, and the wedge gives it 1.41 cubic feet net vented at 30.5 Hz through a 15.5 square inch port: 30 inches wide, 15.5 tall, 8.12 inches at the top and 13.77 at the base. In the Down Fire this driver needed the deepest cabinet in that line; here it is mid-pack.\u003c\/p\u003e\n  \u003cp\u003eA 0.52 Qts on 72 litres rolls off early on paper, with an anechoic F3 of 34.3 Hz, and cabin gain lands exactly on that slope: 0.78 dB of in-car spread across 25 to 60 Hz at 30.5 Hz tuning, on 1.92 dB of ripple. Tuning higher would flatten the anechoic plot and hump the car. The port uses 25.03 of 25.66 inches of path and runs at 15.6 metres per second in the channel against a 16.9 limit, 9.3 at the mouth.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eTrunk-load wedge, explained\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThe 20 degree face is the seat side\u003c\/h4\u003e\n\u003cp\u003eA factory rear seat back\n    leans about 20 degrees off vertical. The wedge's raked rear panel matches that lean and tucks\n    against it, so the cabinet uses the triangle of trunk floor a square box wastes.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThe driver fires rearward\u003c\/h4\u003e\n\u003cp\u003eThe baffle stays vertical and faces\n    the trunk opening. The trunk acts as the acoustic extension into the cabin; nothing about\n    the driver is angled.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003e13.77 inches at the base, 8.12 at the top\u003c\/h4\u003e\n\u003cp\u003eThe port panel clears the motor at 7.09 inches of top depth and the cabinet runs to 8.12 for volume, with the width already at 30. 5.02 inches of flat floor stay clear in front of the panel. The base depth is under the height.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003e30.00 inches wide\u003c\/h4\u003e\n\u003cp\u003eWidth is the wedge's free dimension and it\n    buys two things at once here: airspace, and port length, because the port runs the full\n    width of the box.\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 port is the product\u003c\/h3\u003e\n  \u003cp\u003eThe port is a triangular slot in the bottom-rear corner. The floor and the raked back wall\n  are two of its three sides; the third is a single panel bevelled to sit flush against both.\n  It runs across the cabinet, opens into the box at the far end and exits through the side\n  panel: a straight run with no bend, 25.03 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is an isosceles triangle with 5.75 inch legs, 15.5 square inches, running at\n  15.6 metres per second at the tuning frequency. The mouth is that same triangle cut through\n  the side panel with its three edges rounded over at 1\/2 inch, so the opening at the face is\n  25.9 square inches and air leaves it at 9.3 metres per second, against the 17.0 metre per\n  second threshold where a slot port starts to chuff. The panel's throat end carries a 3\/8 inch\n  roundover for the same reason.\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 cabinet\n    we build. It does not go in this one. Damping material changes the effective volume the\n    port is tuned against, which moves the tuning away from the 30.5 Hz the port was cut for.\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\u003eBelow tuning the port stops loading the cone and excursion climbs without limit toward DC,\n  so a 24 Hz high-pass at 24 dB per octave is part of the specification. Set it and the same\n  cabinet takes substantially more power for the same cone travel.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, the power at which the\n  cone reaches the end of its linear travel in this box. What the voice coil can dissipate as\n  heat is a separate ceiling set by JL Audio.\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 11.063 inch cutout through a\n    double-layer 1.5 inch baffle, with a cosmetic front layer routed for the acrylic insert.\n    Threaded inserts at every mounting location.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eClearance\u003c\/h4\u003e\n\u003cp\u003e300 watts and 11.0 mm of one-way travel; the cone uses 6.2 mm at rated power with the subsonic filter set. This is a quality-of-response product, not an output one. 5.39 inches of mounting depth clears the panel with margin. JL's recommended sealed box is 1.10 cubic feet.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eTwo windowed C braces run the cabinet profile at the third points of the width and seat on the port panel; the windows keep the cavity one chamber.\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 Langboard\n    Elite MDF, the shell folded from one strip with the sides dropped into dados and the port\n    panel seated in dados of its own.\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 12W1v3 at 300 W RMS. Terminal cup is side mounted on the side opposite the port\n  mouth. A dual 2 ohm driver wired parallel presents 1 ohm, which many amplifiers are not\n  stable into; series at 4 ohm is the safe default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. Built to order in Tullahoma, Tennessee. The\n  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 12W1v3. The alignment, the port geometry and the power\n  figures all come from JL Audio's published parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Black","offer_id":44822256517209,"sku":"PO 12-P W W1V3 BB","price":399.99,"currency_code":"USD","in_stock":true},{"title":"None","offer_id":44822256779353,"sku":"PO 12-P W W1V3 B","price":379.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_W_W1V3_Front.jpg?v=1788423914"},{"product_id":"performance-optimized-wedge-ported-12-enclosure-jl-audio-12w3v3","title":"JL Audio 12W3v3 Ported 12\" Wedge Enclosure | Proline X","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 Wedge 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003e500 watts vented at 32 Hz through 18.4 square inches, 1.20 dB of ripple\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.51 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 32.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 35.1 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eSide slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the JL Audio 12W3v3\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\"\u003e1.51\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\"\u003e32.0\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\"\u003e35.1\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\"\u003e18.4\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 32.0 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe 12W3v3 is the 500 watt twelve in JL's mainstream line, a 26.7 Hz motor with a 0.44 Qts and 80.5 litres of Vas. The wedge gives it 1.51 cubic feet net vented at 32 Hz through an 18.4 square inch port, in a cabinet 30 inches wide, 15.5 tall, 8.88 inches at the top and 14.52 at the base.\u003c\/p\u003e\n  \u003cp\u003eA 0.44 Qts rolls off early, so the anechoic F3 is 35.1 Hz, and the in-car curve is where this driver is judged: 1.25 dB of spread across 25 to 60 Hz at 32 Hz tuning, on 1.20 dB of anechoic ripple, the flattest passband of the JL twelves. The port takes 24.79 of the 25.43 inches available and runs at 19.1 metres per second in the channel against a 19.3 limit, 11.9 at the mouth.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eTrunk-load wedge, explained\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThe 20 degree face is the seat side\u003c\/h4\u003e\n\u003cp\u003eA factory rear seat back\n    leans about 20 degrees off vertical. The wedge's raked rear panel matches that lean and tucks\n    against it, so the cabinet uses the triangle of trunk floor a square box wastes.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThe driver fires rearward\u003c\/h4\u003e\n\u003cp\u003eThe baffle stays vertical and faces\n    the trunk opening. The trunk acts as the acoustic extension into the cabin; nothing about\n    the driver is angled.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003e14.52 inches at the base, 8.88 at the top\u003c\/h4\u003e\n\u003cp\u003eA 6.25 inch port leg needs 8.85 inches of top depth to clear the motor, against 8.00 for the magnet alone, and the solver rounds to 8.88. 5.27 inches of flat floor stay clear in front of the panel. The base is an inch under the height.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003e30.00 inches wide\u003c\/h4\u003e\n\u003cp\u003eWidth is the wedge's free dimension and it\n    buys two things at once here: airspace, and port length, because the port runs the full\n    width of the box.\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 port is the product\u003c\/h3\u003e\n  \u003cp\u003eThe port is a triangular slot in the bottom-rear corner. The floor and the raked back wall\n  are two of its three sides; the third is a single panel bevelled to sit flush against both.\n  It runs across the cabinet, opens into the box at the far end and exits through the side\n  panel: a straight run with no bend, 24.79 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is an isosceles triangle with 6.25 inch legs, 18.4 square inches, running at\n  19.1 metres per second at the tuning frequency. The mouth is that same triangle cut through\n  the side panel with its three edges rounded over at 1\/2 inch, so the opening at the face is\n  29.5 square inches and air leaves it at 11.9 metres per second, against the 17.0 metre per\n  second threshold where a slot port starts to chuff. The panel's throat end carries a 3\/8 inch\n  roundover for the same reason.\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 cabinet\n    we build. It does not go in this one. Damping material changes the effective volume the\n    port is tuned against, which moves the tuning away from the 32.0 Hz the port was cut for.\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\u003eBelow tuning the port stops loading the cone and excursion climbs without limit toward DC,\n  so a 25 Hz high-pass at 24 dB per octave is part of the specification. Set it and the same\n  cabinet takes substantially more power for the same cone travel.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, the power at which the\n  cone reaches the end of its linear travel in this box. What the voice coil can dissipate as\n  heat is a separate ceiling set by JL Audio.\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 11.063 inch cutout through a\n    double-layer 1.5 inch baffle, with a cosmetic front layer routed for the acrylic insert.\n    Threaded inserts at every mounting location.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eClearance\u003c\/h4\u003e\n\u003cp\u003eThe channel runs 0.2 metres per second under its turbulence limit at 500 watts; inside the rule, with nothing to spare. The cone uses 7.7 of its 13.0 mm at rated power with the subsonic filter set. 6.65 inches of mounting depth clears the panel. We also build this driver as a 1.23 cubic foot sealed Down Fire, and the graphs tab compares the two.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eTwo windowed C braces run the cabinet profile at the third points of the width and seat on the port panel; the windows keep the cavity one chamber.\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 Langboard\n    Elite MDF, the shell folded from one strip with the sides dropped into dados and the port\n    panel seated in dados of its own.\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 12W3v3 at 500 W RMS. Terminal cup is side mounted on the side opposite the port\n  mouth. A dual 2 ohm driver wired parallel presents 1 ohm, which many amplifiers are not\n  stable into; series at 4 ohm is the safe default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. Built to order in Tullahoma, Tennessee. The\n  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 12W3v3. The alignment, the port geometry and the power\n  figures all come from JL Audio's published parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Black","offer_id":44822256812121,"sku":"PO 12-P W W3V3 BB","price":399.99,"currency_code":"USD","in_stock":true},{"title":"None","offer_id":44822256844889,"sku":"PO 12-P W W3V3 B","price":379.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_W_W3V3_Front.jpg?v=1788423927"},{"product_id":"performance-optimized-wedge-ported-12-enclosure-jl-audio-12w6v3","title":"JL Audio 12W6v3 Ported 12\" Wedge Enclosure | Proline X","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 Wedge 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003e600 watts and 19 mm of travel vented at 33.5 Hz through a 23 square inch port\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.73 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 33.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 30.1 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eSide slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the JL Audio 12W6v3\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\"\u003e1.73\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\"\u003e30.1\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\"\u003e23.0\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 33.5 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe 12W6v3 is the driver that shows what the wedge can and cannot do. 600 watts and 19 mm of travel need port area, and it gets 23.0 square inches, 7.00 inch legs, the largest port in this line, in a cabinet 29.5 inches wide, 15.5 tall, 10.50 inches at the top and 16.14 at the base. 1.73 cubic feet net, vented at 33.5 Hz.\u003c\/p\u003e\n  \u003cp\u003eJL's own ported recommendation for this driver is 1.3 cubic feet at 33 Hz through 21.9 square inches of port 37 inches long. A straight port across a 29.5 inch wedge is 24.6 inches at most, so this cabinet gets its tuning from volume instead: 1.73 cubic feet lets a 24.45 inch port land at 33.5 Hz with more area than JL's. The channel runs at 21.1 metres per second against a 23.2 limit, 13.8 at the mouth. In the car it spreads 3.38 dB across 25 to 60 Hz on 2.54 dB of anechoic ripple, with an F3 of 30.1 Hz.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eTrunk-load wedge, explained\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThe 20 degree face is the seat side\u003c\/h4\u003e\n\u003cp\u003eA factory rear seat back\n    leans about 20 degrees off vertical. The wedge's raked rear panel matches that lean and tucks\n    against it, so the cabinet uses the triangle of trunk floor a square box wastes.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThe driver fires rearward\u003c\/h4\u003e\n\u003cp\u003eThe baffle stays vertical and faces\n    the trunk opening. The trunk acts as the acoustic extension into the cabin; nothing about\n    the driver is angled.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003e16.14 inches at the base, 10.50 at the top\u003c\/h4\u003e\n\u003cp\u003eThe largest port leg in the line needs the deepest seat: 10.47 inches of top depth to clear the motor, against 8.86 for the magnet alone. That puts the base at 16.14, over our 16 inch comfort line and under the 18 inch limit, and deeper than the cabinet is tall. 6.14 inches of flat floor stay clear in front of the panel. Measure the trunk floor before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003e29.50 inches wide\u003c\/h4\u003e\n\u003cp\u003eWidth is the wedge's free dimension and it\n    buys two things at once here: airspace, and port length, because the port runs the full\n    width of the box.\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 port is the product\u003c\/h3\u003e\n  \u003cp\u003eThe port is a triangular slot in the bottom-rear corner. The floor and the raked back wall\n  are two of its three sides; the third is a single panel bevelled to sit flush against both.\n  It runs across the cabinet, opens into the box at the far end and exits through the side\n  panel: a straight run with no bend, 24.45 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is an isosceles triangle with 7.00 inch legs, 23.0 square inches, running at\n  21.1 metres per second at the tuning frequency. The mouth is that same triangle cut through\n  the side panel with its three edges rounded over at 1\/2 inch, so the opening at the face is\n  35.4 square inches and air leaves it at 13.8 metres per second, against the 17.0 metre per\n  second threshold where a slot port starts to chuff. The panel's throat end carries a 3\/8 inch\n  roundover for the same reason.\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 cabinet\n    we build. It does not go in this one. Damping material changes the effective volume the\n    port is tuned against, which moves the tuning away from the 33.5 Hz the port was cut for.\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\u003eBelow tuning the port stops loading the cone and excursion climbs without limit toward DC,\n  so a 26 Hz high-pass at 24 dB per octave is part of the specification. Set it and the same\n  cabinet takes substantially more power for the same cone travel.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, the power at which the\n  cone reaches the end of its linear travel in this box. What the voice coil can dissipate as\n  heat is a separate ceiling set by JL Audio.\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 11.024 inch cutout through a\n    double-layer 1.5 inch baffle, with a cosmetic front layer routed for the acrylic insert.\n    Threaded inserts at every mounting location.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eClearance\u003c\/h4\u003e\n\u003cp\u003e7.52 inches of mounting depth is the second deepest motor in the JL range and it is what drives the base depth. At 600 watts the cone uses 8.6 of its 19.0 mm with the subsonic filter set, so excursion is not the limit here; the port is, and it is inside its rule by 2 metres per second. We also build this driver as a 1.00 cubic foot sealed wedge, and the graphs tab compares the two.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eTwo windowed C braces run the cabinet profile at the third points of the width and seat on the port panel; the windows keep the cavity one chamber.\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 Langboard\n    Elite MDF, the shell folded from one strip with the sides dropped into dados and the port\n    panel seated in dados of its own.\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 12W6v3 at 600 W RMS. Terminal cup is side mounted on the side opposite the port\n  mouth. A dual 2 ohm driver wired parallel presents 1 ohm, which many amplifiers are not\n  stable into; series at 4 ohm is the safe default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. Built to order in Tullahoma, Tennessee. The\n  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 12W6v3. The alignment, the port geometry and the power\n  figures all come from JL Audio's published parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Black","offer_id":44822256910425,"sku":"PO 12-P W W6V3 BB","price":399.99,"currency_code":"USD","in_stock":true},{"title":"None","offer_id":44822256943193,"sku":"PO 12-P W W6V3 B","price":379.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_W_W6V3_Front.jpg?v=1788423939"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/collections\/12-inch-subwoofer-boxes-9127304_1db7eae3-f4d1-4597-85d4-04ab747dbcad.jpg?v=1788586617","url":"https:\/\/audiointensity.com\/collections\/12-inch-ported-subwoofer-box.oembed?page=2","provider":"Audio Intensity","version":"1.0","type":"link"}