Proline X
Performance Optimized Wedge Wide Sealed Triple 10" Enclosure | JL Audio 10TW1
SKU: PO 10TW-S W TW1 BB
- Best For: Triple JL Audio 10TW1 SUV Cargo-Floor Builds
- Net Volume: 0.547 cu ft per Driver (1.64 cu ft Net Total)
- Driver Match: Three JL Audio 10TW1 (Dual 2 Ohm), matched
- Construction: 3 Chambers | 40" Wide Wedge | V-Groove/Dado | Double 1.5" Baffle | 3 Terminal Cups
Financing available. Choose Shop Pay Installments at checkout.
Performance Optimized Wedge Wide Sealed Triple 10" Enclosure | JL Audio 10TW1
More enclosures cut for JL Audio subwoofers: JL Audio Subwoofer Boxes
Performance Optimized Wedge Wide | Triple JL Audio 10TW1
Triple 10" Sealed Wedge Enclosure | Built for SUV Cargo Floors
Three JL Audio 10TW1 in a 40 Inch Sealed Wedge
The wide wedge is a fixed SUV platform: 40 inches across and 17 tall, built to span a cargo floor against the rear seat. Depth is the only dimension that moves, and it is solved for the driver. Here it runs 5.42 in at the top to 11.61 in at the base.
0.547 cubic feet net per driver on JL Audio's published Fs 41.5 Hz, Qts 0.650 and Vas 10.3 liters: Qtc 0.839, system resonance 53.6 Hz, half power 46.4 Hz. The maker's recommended sealed size is 0.35 cubic feet per driver, but the 4.37 in deep motor sets the shallowest the wedge can be, so it comes down only to 0.547: a small lift near resonance, 0.4 dB above flat.
Three Fully Separate Chambers
Two bonded full-height 3/4 inch MDF dividers split the cabinet into three sealed chambers of 0.547 cubic feet net, one driver each, so no driver loads another. Three pre-wired terminal cups on the rear panel, one per chamber. The center chamber has no side wall, so all three cups go on the back for a matching set.
Cargo-Floor Wedge Design
The woofers mount on the vertical face and fire rearward toward the liftgate. The raked face goes against the rear seat back.
Raked Face Matches the Seat
A 20 degree rear panel follows the lean of a rear seat back.
40 Inches Across
Built to span a cargo floor. Measure between the rear wheel wells.
17 Inches Tall
Check it against your cargo cover and rear glass before you order.
11.61 Inches Deep at the Base
Measure the cargo floor before you order.
Engineered for the JL Audio 10TW1
Half power lands at 46.4 Hz anechoic, before cabin gain. JL Audio publishes 0.047 cubic feet of driver displacement and it is taken out of the net figure for every driver.
Alignment Numbers (Per Driver)
| Driver | System Qtc | fc | F3 |
|---|---|---|---|
| 10TW1-2 | Qtc 0.839 | 53.6 Hz | 46.4 Hz |
Mounting Geometry
Each opening is cut to 9.055 in for the 10.394 in frame. The rear panel rakes 20 degrees, so the cavity deepens from 5.42 in at the top to 11.61 in at the base, and the 4.37 in deep motor clears it with 0.75 in to spare. Three woofers across the 40 inch face, one centered on each chamber.
What the Numbers Rest On
Langboard Elite MDF
Premium 3/4 in MDF throughout.
V-Groove and Dado Joinery
CNC cut V-grooves at every fold, sides and dividers seated in dados.
Double-Layer 1.5" Front Baffle
Two bonded 3/4 in MDF sheets at the driver face, the outer layer machined as a flush recess.
JL Audio's Own Parameters
Fs 41.5 Hz, Qts 0.650, Qes 0.700, Qms 9.700, Vas 10.3 L, Sd 268 cm2, Xmax 10 mm.
Wiring Three JL Audio 10TW1 to Your Amplifier
Each 10TW1-2 has two 2 ohm voice coils, 4 ohms in series or 1 ohm in parallel. With each driver's coils in series and the three cups in parallel, the three present 1.33 ohms to a mono amplifier. With each driver's coils in parallel and the three in series, they present 3 ohms. Three drivers do not reach the round loads a pair does, so check the result against your amplifier's minimum stable impedance before powering up.
JL Audio rates the driver at 300 watts RMS each, 900 across all three. Recommended amplifier: 180 to 250 W RMS per driver, 540 to 750 W RMS for the full set of 3. Travel, not heat, sets the top: the cone reaches Xmax at 250 W per driver with a 25 Hz subsonic set, under the 300 W rating. The top of that range needs the 25 Hz subsonic; without it keep each driver under 231 W.
Built in Tennessee, Backed by Audio Intensity
Cut and assembled in Tullahoma, Tennessee on our own CNC equipment. Finished in plush black carpet with the gloss black acrylic baffle insert, three pre-wired terminal cups on the rear panel, 12 gauge OFC. Polyfill wall lining installed in every chamber. Threaded inserts at every mounting location, stainless machine screws in the box. 1 year limited warranty. Enclosure only, the drivers are purchased separately. Call or text 931-563-5151.
Triple JL Audio 10TW1: 40 Inch SUV Sealed Wedge
0.547 cubic feet net per driver at Qtc 0.839, F3 46.4 Hz, cut direct fit and built to order in Tennessee.
| Specification | Value |
|---|---|
| Series | Proline X Performance Optimized Wedge Wide |
| Compatible Driver | JL Audio 10TW1, quantity 3, matched. Direct fit |
| Configuration | Triple 10 inch sealed wedge, 3 chambers, 1 driver per chamber |
| Mounting Position | SUV cargo floor, raked face against the rear seat back |
| Firing Direction | Rearward toward the liftgate. Not a down fire design |
| External Width | 40 in |
| External Height | 17 in at the seat face |
| External Depth | 11.61 in at the base, tapering to 5.42 in at the top |
| Internal Volume, Gross | 1.86 cu ft total |
| Internal Volume, Net Acoustic | 0.547 cu ft per driver, 1.64 cu ft total, after both dividers and JL Audio's published 0.047 cu ft displacement per driver |
| Driver Mounting Depth | 4.37 in required; 0.75 in clearance above the motor against the raked rear panel |
| Alignment Per Driver | 10TW1-2 Qtc 0.839, fc 53.6 Hz, F3 46.4 Hz anechoic |
| Woofer Openings | 3 at 9.055 in |
| Woofer Layout | One row across the face |
| Frame Outer Diameter | 10.394 in |
| Fs / Qts / Qes / Qms | 41.5 Hz / 0.650 / 0.700 / 9.700 |
| Vas / Sd / Xmax | 10.3 L / 268 cm2 / 10 mm |
| Driver Power Handling | 300 W RMS per driver, 900 W RMS for the set of 3 (thermal rating) |
| Recommended Amplifier | 180-250 W RMS per driver, 540-750 W RMS for the full set, at 3 ohms |
| Parameter Source | JL Audio published specifications |
| Material | Langboard Elite MDF |
| Construction | CNC cut, V-groove and dado joinery |
| Panel Thickness | 0.75 in |
| Front Baffle | 1.5 in double baffle, outer layer machined as a flush recess |
| Internal Bracing | Two full-height 3/4 in dividers |
| Driver Mounting | Threaded inserts, stainless machine screws included |
| Terminal Cups | Three Proline X ABS and carbon fiber composite, on the rear panel, one per chamber, pre wired 12 gauge OFC |
| Acrylic Insert | Gloss black acrylic baffle insert standard; None variant minus $20 |
| Damping | Light polyfill wall lining in every chamber, does not alter acoustic volume |
| Carpet | Plush black |
| Shipping Weight | 64 lb |
| Warranty | 1 Year Limited |
| Built In | Tullahoma, Tennessee |
00Sizing the amplifier
Every wattage on this panel is per driver. This cabinet holds three, so the amplifier feeds all three at once.
01Is it a sealed driver?
Efficiency bandwidth product places the motor before anything else is decided.
02What the box does to it
0.547 cu ft against a 10.3 L Vas.
03The watts that reach Xmax (in this enclosure)
Travel scales with the square root of power, so there is one wattage that puts the cone exactly on 10.0 mm — and a bigger one once a subsonic filter stops it wasting travel below the passband.
| Param | Value | Unit | Note |
|---|---|---|---|
| Fs | 41.50 | Hz | free-air resonance |
| Qts | 0.650 | Dual 2 Ohm | |
| Vas | 10.30 | L | equivalent compliance |
| Sd | 268.0 | cm² | effective piston area |
| Xmax | 10 | mm | one-way linear travel |
| Pe | 300 | W | continuous RMS |
| SPL | 82.1 | dB | 1 W / 1 m, derived from T/S |
Driver parameters as published by JL Audio 10TW1-2 published specifications. Curves computed against this enclosure’s actual net airspace.
Built From a Spec Sheet, Not a Sales Sheet
Every Proline X Performance Series enclosure is CNC-cut from Langboard Elite MDF, 3/4" (18mm) panels produced to published mill specifications. Most enclosure manufacturers source generic MDF without published data. We can tell you the internal bond rating, the modulus of elasticity, the modulus of rupture, and the face and edge screw holding strength for every panel in this enclosure, because we chose the material based on those numbers, not on price or availability.
Langboard Elite is produced in the United States. The specifications below are pulled directly from Langboard's published mill data and are verifiable. This is the same panel stock used in our full Proline X lineup.
Langboard Elite MDF: Published Mill Data
| Property | Value | Why It Matters |
|---|---|---|
| Panel Stock | Langboard Elite MDF | Named, verifiable panel source, not generic "high-density MDF" |
| Thickness | 3/4" (18mm) | Industry standard for subwoofer enclosures; panels below this flex under pressure |
| Density | 48.5 lbs/ft³ | Higher density = less porosity, better screw retention, reduced resonance |
| Internal Bond | 200 psi | Measures resistance to delamination under sustained internal pressure. The most enclosure-relevant spec on this sheet |
| Modulus of Rupture (MOR) | 4,200 psi | Bending strength before the panel breaks, relevant for larger unsupported baffle spans |
| Modulus of Elasticity (MOE) | 410,000 psi | Stiffness under load; higher MOE means less panel flex under bass pressure, less resonance |
| Face Screw Holding | 325 lbs | How firmly the panel surface holds a screw; critical for baffle joint integrity over time |
| Edge Screw Holding | 250 lbs | Panel edge retention, relevant for every joint that isn't face-to-face |
200 psi: The Number That Actually Matters for Enclosures
The internal bond rating measures how well the MDF panel resists delamination under sustained pressure applied perpendicular to the face. In a subwoofer enclosure, every bass transient generates a pressure pulse that pushes outward on every panel simultaneously. A panel that begins to delaminate internally loses stiffness gradually. The symptoms are slow: a box that starts to sound softer, less defined, less punchy over months of use. 200 psi internal bond is the spec that determines how long this enclosure holds its acoustic integrity under daily use at real power levels.
410,000 psi MOE: Less Flex, Less Resonance
The modulus of elasticity measures panel stiffness, its resistance to bending under load. A stiffer panel flexes less under the pressure generated by a high-excursion driver at volume. Panel flex is a source of acoustic coloration: the panel itself begins to radiate sound at its own resonant frequency, adding distortion to the output. 410,000 psi stiffness combined with V-groove and dado joinery means the panels stay rigid and the bracing controls resonance at the structure level, not the panel level. The bass you hear comes from the driver, not the box.
325 lb Face / 250 lb Edge: Joints That Stay Locked
Screw holding strength determines how firmly the panel grips a fastener at the face and at the edge. This matters most at the baffle joint, where the front panel meets the side panels and where the driver is mounted. A panel with low screw holding strength allows fasteners to loosen over time under vibration, leading to air gaps at the joint and loss of acoustic seal. 325 lb face screw holding strength means the baffle hardware stays put. Combined with dado joinery and adhesive, the front panel on a Proline X Performance Series enclosure is not going anywhere.
Named Panel Stock: Not "Premium MDF"
The phrase "premium MDF" or "high-density MDF" appears on marketing copy for enclosures across every price point, from $40 to $400. It is not a specification. It is a description with no defined standard. Langboard Elite is a named, sourced, mill-documented product with published data. We name it in our copy because naming it holds us accountable to the spec. You can look up Langboard Elite independently, verify the numbers on this page, and confirm you are getting what we say you are getting. That is the point.
Why Proline X?
Most enclosures are built to a price point. Proline X is built to a spec. Every box starts with published-data MDF, gets CNC-cut to exact internal volume, and is assembled by hand in our Tennessee facility. The difference shows up in the measurements, and in how the box holds up two years into daily use.
CNC-Cut to Spec
Panels are machine-cut on ShopSabre CNC routers and joined with V-groove and dado joinery. Consistent geometry, no hand-cut variance, no gaps at the joints.
Handcrafted in USA
Hand-assembled at our facility in Tullahoma, TN. Every enclosure is inspected before it ships.
Tuned to the Build
Internal volume and port geometry are calculated to spec and CNC-cut to exact dimensions. The box performs the same way every time.
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