Proline X Performance Wedge P10-WS III Sealed Enclosure for 10" Subwoofers

Proline X P10-WS III Single 10" Wedge Sealed Enclosure | V3 0.70 ft³ Net | Sealed Alignment | Wedge Profile | 8" Max Depth | Langboard Elite MDF | Built in Tennessee One 10" Driver. Wedge Geometry. Reclaims Trunk Space Without Compromise. The Proline X P10-WS III is the third-generation single 10" sealed wedge enclosure, built for installs where rear seat clearance and trunk cargo space matter as much as bass output. At 0.70 ft³ net sealed with a tapered profile that hugs the rear seat contour, this enclosure delivers the correct internal airspace for a 10" driver in a footprint that reclaims inches of upper trunk space compared to a rectangular alternative. The wedge tapers from 13" deep at the bottom to 8.5" deep at the top, matching the natural recline angle of most modern rear seats. This eliminates the wasted triangular void that sits behind a rectangular enclosure when positioned against an angled seatback. The 14.5" width keeps side-to-side clearance manageable in compact and midsize trunks. The 0.70 ft³ internal volume lands in the correct sealed range for the majority of 10" drivers on the market. Every panel is CNC-cut from Langboard Elite MDF to exact internal volume and assembled by hand in our Tennessee facility. Available in Dark Gray Trunkliner at $159.99 or Plush Black at $169.99. Shipping is included. Why Wedge Geometry The Problem With Rectangular Enclosures Modern sedan and coupe rear seats recline at 20 to 30 degrees from vertical. When a rectangular enclosure is placed against that angled surface, the bottom edge sits flush against the seat while the top edge extends straight up into the trunk, leaving a triangular air gap behind the enclosure that serves no acoustic purpose. That wasted space typically measures 2 to 4 inches at the top edge — space you could be using for cargo or simply not consuming visually. The Solution The P10-WS III's back panel angles to match typical rear seat recline. The enclosure nestles against the seat naturally. The full 0.70 ft³ internal airspace is preserved through optimized width and height dimensions, so there is no acoustic compromise versus a rectangular 10" sealed enclosure of equivalent volume. The result is correct sealed performance in a footprint that works with the vehicle instead of against it. Where The Wedge Pays Off Compact sedans where every inch of trunk depth matters. Coupes and sports cars with aggressive seat recline angles. Midsize sedans where the driver wants serious bass without giving up cargo flexibility. Any install where the trunk gets used for groceries, luggage, or work gear and the enclosure has to share the space. The 10" format also makes the P10-WS III the right choice for vehicles where the trunk opening limits what can be loaded in — a 14.5" wide enclosure clears most trunk openings without difficulty. Construction: Langboard Elite MDF, V-Groove And Dado Joinery Langboard Elite MDF, Named And Mill-Documented Every panel is cut from Langboard Elite MDF, 3/4" (18mm), a named, mill-documented panel stock produced in the United States. The specifications below are pulled directly from Langboard's published mill data. Density 48.5 lbs/ft³ Higher density means less porosity, better screw retention, reduced resonance Internal Bond 200 psi Resistance to delamination under sustained bass pressure Modulus of Elasticity 410,000 psi Panel stiffness under load; less flex means less resonance Face Screw Holding 325 lbs Baffle hardware stays locked under vibration Edge Screw Holding 250 lbs Joint integrity at every panel edge connection V-Groove And Dado Joinery Every panel joint uses V-groove and dado joinery — CNC-cut interlocking grooves that mechanically lock panels before adhesive is applied. The angled back panel on a wedge enclosure presents joint geometry that simple butt joints cannot handle reliably over time. V-groove and dado joinery provides the mechanical interlocking and increased glue surface area that keeps angled joints airtight under bass pressure cycling. Proline X Terminal Cup Built in-house at our Tennessee facility. Proline X ABS/carbon fiber terminal cup with stainless hardware and copper ring terminals, pre-wired 12g OFC speaker wire. Recessed mount keeps the cup protected from cargo contact. Hand-Assembled In Tennessee Every enclosure is CNC-cut on ShopSabre industrial routers and hand-assembled at our facility in Tullahoma, Tennessee. Inspected before it ships. No overseas manufacturing. Fitment Guide Dimensional Specifications External Dimensions: 14.5" W x 13" H x 8.5" D (top) / 13" D (bottom) Net Internal Volume: 0.70 ft³ Alignment: Sealed Subwoofer Cutout: 9.25" Max Mounting Depth: 8" Front Panel Thickness: 0.75" Single Baffle Driver Compatibility The P10-WS III accommodates any 10" subwoofer with a cutout diameter at or below 9.25" and a mounting depth at or below 8". Optimal sealed volume range for the vast majority of 10" drivers falls between 0.50 ft³ and 1.0 ft³ — the P10-WS III's 0.70 ft³ sits in the middle of that range for broad compatibility. Verify published driver specs before ordering. Installation Orientation Position the shallow (8.5") edge against the rear seat, with the 13" deep edge toward the trunk opening. This is what produces the space-saving benefit — the wedge has to be oriented correctly for the geometry to work. Mount the subwoofer with the cone facing forward toward the rear seat for maximum cabin coupling, or rearward toward the trunk opening for maximum output. Single 10" Sealed. Wedge Geometry. Tennessee-Built. The Proline X P10-WS III delivers a single 10" sealed alignment in a footprint that works with your vehicle's rear seat geometry instead of against it. Langboard Elite MDF. V-groove and dado joinery. Proline X ABS/carbon fiber terminal cup with stainless hardware and copper ring terminals. Hand-assembled in Tennessee and inspected before it ships. One driver. Sealed accuracy. Wedge profile. Compact trunk footprint. Shipping included.