{"product_id":"proline-x-p15-s-single-15-sealed-subwoofer-enclosure-v3","title":"Proline X P15-S | Single 15\" Sealed 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\u003cdiv class=\"px-desc\"\u003e\n\u003c!-- Hero --\u003e\n\u003cdiv class=\"px-hero\"\u003e\n\u003cp class=\"px-title\"\u003eProline X P15-S\u003c\/p\u003e\n\u003cp class=\"px-subtitle\"\u003eSingle 15\" Sealed Subwoofer Enclosure | V3\u003c\/p\u003e\n\u003cdiv class=\"px-badges\"\u003e\n\u003cspan class=\"px-badge\"\u003e2.0 ft³ Net\u003c\/span\u003e \u003cspan class=\"px-badge\"\u003eSealed Alignment\u003c\/span\u003e \u003cspan class=\"px-badge\"\u003e9\" Max Depth\u003c\/span\u003e \u003cspan class=\"px-badge\"\u003e0.75\" Single Baffle\u003c\/span\u003e \u003cspan class=\"px-badge\"\u003eLangboard Elite MDF\u003c\/span\u003e \u003cspan class=\"px-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Introduction --\u003e\n\u003cdiv class=\"px-section\"\u003e\n\u003ch2\u003eMaximum Cone Area. Sealed Accuracy. Built to Last.\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eProline X P15-S\u003c\/strong\u003e is a single 15\" sealed enclosure built for installs that need the output and low-frequency authority of the largest common subwoofer format — in a controlled, accurate alignment. At \u003cstrong\u003e2.0 ft³ net\u003c\/strong\u003e and sealed alignment, the P15-S gives a 15\" driver the air space it needs to produce deep, authoritative bass with a flat, predictable response curve. No port resonance. No tuning peak. No frequency-specific coloration. The 15\" cone moves significantly more air per excursion than any smaller driver — in sealed alignment, that output advantage is delivered with the same transient accuracy and DSP-tunability that sealed enclosures are known for.\u003c\/p\u003e\n\u003cp\u003eAt \u003cstrong\u003e19\" wide, 17\" tall, and 15\" deep\u003c\/strong\u003e, the P15-S fits in most full-size sedan and truck trunks without custom fabrication. The \u003cstrong\u003e9\" max mounting depth\u003c\/strong\u003e covers the majority of standard 15\" drivers. For installs where you need the physical impact and low-frequency extension that only a 15\" driver delivers — but want accuracy and control rather than a resonance — this is the correct enclosure.\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\u003c!-- Why 15\" Sealed --\u003e\n\u003cdiv class=\"px-section\"\u003e\n\u003ch2\u003eWhy a 15\" Driver in Sealed Alignment\u003c\/h2\u003e\n\u003cp\u003eThe argument for a sealed 15\" comes down to one specific performance combination: the cone area and air displacement advantage of a 15\" driver, delivered with the transient accuracy and flat response profile of a sealed enclosure. Most builders who choose a 15\" driver go ported for maximum output. The sealed option is for a different listener — one who wants the physical presence and low-frequency reach of a 15\" without the port resonance, the ported tuning peak, or the larger enclosure depth that a ported 15\" requires.\u003c\/p\u003e\n\u003cp\u003eAt \u003cstrong\u003e2.0 ft³ net\u003c\/strong\u003e, the P15-S places most standard 15\" drivers in the center of their recommended sealed range. The 15\" cone at this volume produces output levels that exceed a dual 12\" sealed configuration — with a single driver, a single terminal connection, and a simpler install. For installs where depth is available and output is the priority but accuracy cannot be sacrificed, the sealed 15\" is the most capable single-driver sealed configuration in the Performance Series.\u003c\/p\u003e\n\u003cdiv class=\"px-grid\"\u003e\n\u003cdiv class=\"px-card\"\u003e\n\u003ch4\u003eMaximum Single-Driver Cone Area\u003c\/h4\u003e\n\u003cp\u003eA 15\" cone has roughly 55% more surface area than a 12\" driver. In sealed alignment, that translates directly into more output, deeper low-frequency extension, and greater physical impact — all delivered with the flat, controlled response that sealed enclosures produce.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"px-card\"\u003e\n\u003ch4\u003eDeep Low-Frequency Extension\u003c\/h4\u003e\n\u003cp\u003eThe 15\" driver reaches sub-bass frequencies that smaller drivers in sealed enclosures cannot match at equivalent output levels. The P15-S produces bass below 30Hz with authority — the kind of physical presence that requires cone area, not just power.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"px-card\"\u003e\n\u003ch4\u003eSealed Accuracy at 15\" Scale\u003c\/h4\u003e\n\u003cp\u003eSealed alignment preserves the transient accuracy that produces tight, musical bass at any output level. The P15-S delivers the physical impact of a large-format driver without the port resonance or tuning-specific coloration that ported 15\" builds produce.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"px-card\"\u003e\n\u003ch4\u003eDSP-Friendly Alignment\u003c\/h4\u003e\n\u003cp\u003eThe predictable 12 dB\/octave sealed rolloff responds accurately to DSP bass boost and crossover adjustments. Running a Goldhorn DSP or any active processor? Sealed alignment gives you full control over the final response without fighting a ported tuning peak.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Construction --\u003e\n\u003cdiv class=\"px-section\"\u003e\n\u003ch2\u003eConstruction: The Proline X Standard at 15\" Scale\u003c\/h2\u003e\n\u003cp\u003eThe P15-S uses the same Langboard Elite MDF and V-groove and dado joinery construction as every enclosure in the Proline X Performance Series. At 19\" wide and 15\" deep with a 15\" motor generating sustained pressure on every panel, the construction standard that holds up in compact 8\" builds is the same standard required here — and the P15-S is built to it without exception.\u003c\/p\u003e\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\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\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. A 15\" driver in a sealed enclosure generates significant sustained pressure on every panel simultaneously at high output levels. Every seam on the P15-S is mechanically locked before adhesive is applied — the joint integrity does not depend on adhesive condition alone. The box does not flex. The acoustic seal does not degrade over time.\u003c\/p\u003e\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 over time.\u003c\/p\u003e\n\u003cdiv class=\"px-grid\"\u003e\n\u003cdiv class=\"px-card\"\u003e\n\u003ch4\u003eShopSabre CNC Routers\u003c\/h4\u003e\n\u003cp\u003eEvery panel is machine-cut on ShopSabre industrial CNC routers. Consistent geometry, no hand-cut variance, no gaps at the joints. The internal volume of every P15-S is identical to spec across every unit produced.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"px-card\"\u003e\n\u003ch4\u003eHand-Assembled in Tennessee\u003c\/h4\u003e\n\u003cp\u003eEvery enclosure is hand-assembled at our Tennessee facility and inspected before it ships. No overseas manufacturing. No batch assembly shortcuts — 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 for a clean, stealth appearance. Plush Black delivers the traditional aftermarket look. Both are durably bonded for long-term wear.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"px-card\"\u003e\n\u003ch4\u003eShipping Included\u003c\/h4\u003e\n\u003cp\u003eNo freight charges at checkout. The price you see is the price you pay. The enclosure ships assembled and ready to install.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Fitment --\u003e\n\u003cdiv class=\"px-section\"\u003e\n\u003ch2\u003eFitment Guide\u003c\/h2\u003e\n\u003cp\u003eThe P15-S fits in most full-size sedan and truck trunk configurations. At \u003cstrong\u003e19\"W x 17\"H x 15\"D\u003c\/strong\u003e, the 17\" height and 15\" depth are the critical dimensions — verify both against your available trunk space before ordering.\u003c\/p\u003e\n\u003ch3\u003eDimensional Specifications\u003c\/h3\u003e\n\u003cdiv class=\"px-highlight\"\u003e\n\u003cp\u003e\u003cstrong\u003eExternal Dimensions:\u003c\/strong\u003e 19\" W x 17\" H x 15\" D\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNet Internal Volume:\u003c\/strong\u003e 2.0 ft³\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTuning Frequency:\u003c\/strong\u003e N\/A — Sealed\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSubwoofer Cutout:\u003c\/strong\u003e 14.1\"\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMax Mounting Depth:\u003c\/strong\u003e 9\"\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\u003ch3\u003eDriver Compatibility\u003c\/h3\u003e\n\u003cp\u003eThe P15-S accommodates any 15\" subwoofer with a cutout diameter at or below \u003cstrong\u003e14.1\"\u003c\/strong\u003e and a mounting depth at or below \u003cstrong\u003e9\"\u003c\/strong\u003e. Verify both dimensions against your driver's published specifications before ordering.\u003c\/p\u003e\n\u003ch3\u003eCompatible Drivers\u003c\/h3\u003e\n\u003cp\u003eThe following drivers are available from Audio Intensity and are compatible with the P15-S:\u003c\/p\u003e\n\u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/prodigy-audio-1200-watt-15-inch-subwoofer-nb5-series\"\u003eProdigy NB5-15D2 →\u003c\/a\u003e \u003ca class=\"px-driver-link\" href=\"https:\/\/audiointensity.com\/products\/image-dynamics-idmax15d-v4\"\u003eImage Dynamics IDMAX15 V4 →\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\u003ch3\u003eIdeal Install Applications\u003c\/h3\u003e\n\u003cdiv class=\"px-grid\"\u003e\n\u003cdiv class=\"px-card\"\u003e\n\u003ch4\u003eFull-Size Trunk Build\u003c\/h4\u003e\n\u003cp\u003eAt 19\" wide and 15\" deep, the P15-S fits in most full-size sedan and truck trunk configurations. The 17\" height is the most constraining dimension in tighter trunk environments — measure available height before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"px-card\"\u003e\n\u003ch4\u003eSQ and DSP-Controlled Systems\u003c\/h4\u003e\n\u003cp\u003eSealed alignment and 2.0 ft³ net volume make the P15-S the correct enclosure for 15\" drivers in sound quality and DSP-controlled builds where the goal is maximum output with accurate, tuneable response rather than port-tuned SPL.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"px-card\"\u003e\n\u003ch4\u003eHigh-Output Daily Systems\u003c\/h4\u003e\n\u003cp\u003eThe 15\" format in sealed alignment produces the most output available from a single-driver sealed configuration in the Performance Series. For daily systems where physical bass impact is the priority and accuracy cannot be sacrificed, the P15-S is the top of the sealed lineup.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"px-card\"\u003e\n\u003ch4\u003eStep Up From Dual 12\" Sealed\u003c\/h4\u003e\n\u003cp\u003eFor builds running the P12D-S that need more output and deeper extension from a single driver rather than two — the P15-S is the natural progression. More cone area, more output, simpler wiring, in a comparable trunk footprint.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- CTA --\u003e\n\u003cdiv class=\"px-cta\"\u003e\n\u003ch2\u003eMaximum Sealed Output. Tennessee-Built. Shipping Included.\u003c\/h2\u003e\n\u003cp\u003eThe Proline X P15-S is the most capable single-driver sealed enclosure in the Performance Series. Langboard Elite MDF. V-groove and dado joinery. 9\" max mounting depth. In-house terminal cup. Hand-assembled in Tennessee and inspected before it ships.\u003c\/p\u003e\n\u003cp\u003eMaximum cone area. Sealed accuracy. The top of the Performance Series sealed lineup. \u003cstrong\u003e$219.99 Dark Gray Trunkliner. $229.99 Plush Black.\u003c\/strong\u003e Shipping included.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Dark Gray Trunkliner","offer_id":43157046329433,"sku":"P15-S III-G","price":219.99,"currency_code":"USD","in_stock":true},{"title":"Plush Black","offer_id":43157046362201,"sku":"P15-S III-B","price":229.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/products\/proline-x-performance-p15-s-sealed-enclosure-for-15-subwooferssubwoofer-enclosuresproline-x-965307.jpg?v=1761969168","url":"https:\/\/audiointensity.com\/products\/proline-x-p15-s-single-15-sealed-subwoofer-enclosure-v3","provider":"Audio Intensity","version":"1.0","type":"link"}