Proline X
Proline X PO 10D-S W GUS | Dual 10" Sealed Wedge Subwoofer Enclosure | Built for ResoNix GUS-10
SKU: PO 10D-S W GUS
- Driver: ResoNix GUS-10 x2, direct fit only
- Net Acoustic: 0.599 cu ft per driver, ResoNix target 0.60
- Alignment: Qtc 0.715, F3 34.2 Hz
- Chambers: Dual, full divider
- Position: Trunk mount, tall face against rear seat
- Firing: Rearward. No down fire option
- Footprint: 30.25 in W x 12.25 in D at the base
- Weight: 42 lb
Financing available — choose Shop Pay Installments at checkout.
Proline X PO 10D-S W GUS | Dual 10" Sealed Wedge Subwoofer Enclosure | Built for ResoNix GUS-10
Two GUS-10s, Each in Its Own 0.60 Cubic Feet.
A dual chamber sealed wedge cut for the ResoNix GUS-10 and nothing else. It sits in the trunk with the tall face against the back of the rear seat and the drivers firing rearward, using the length of the trunk instead of standing in the middle of it.
This Is Not a Down Fire Enclosure
The wedge works in one orientation: tall face flat against the rear seat back, taper running out toward the trunk lid, drivers firing rearward. There are no feet, no baffle clearance gap, and no down fire option on this cabinet.
It is cut direct fit to the GUS-10 at a 235.3mm opening. A standard 10 will not fit, and would not see the correct airspace if it did.
Built Backward From One Published Number
ResoNix specifies 0.60 cubic feet of net acoustic airspace per GUS-10, the volume that produces a maximally flat sealed alignment. Each chamber here is built at 0.63 cubic feet gross. Subtract the driver's 0.031 cubic feet of displacement and each GUS-10 sees 0.599 cubic feet.
That is not close to the target. That is the target. Total gross volume across both chambers is 1.26 cubic feet, 1.198 net acoustic.
Why a Wedge
It Uses the Trunk Lengthwise
Tall face against the rear seat, tapering down as it runs out toward the lid. The cabinet claims the deep space at the base of the trunk and gives height back where the lid closes, so you keep usable trunk.
The Trunk Is Part of the System
Firing rearward means output loads into the trunk volume and reaches the cabin through the rear seat and deck. That path is what gives a trunk mounted subwoofer its weight.
Harder to Point At
Because the drivers do not radiate straight into the cabin, the low end arrives through the structure rather than as a beam from behind your head, which makes keeping the stage forward easier.
Two Sealed Chambers
A full divider gives each GUS-10 its own airspace. Neither cone loads against the other, so the pair stays predictable when both are working hard.
Dual Chamber, Not Common Chamber
Each GUS-10 loads into its own sealed 0.63 cubic foot chamber, isolated by a full divider. With separate chambers, one driver's cone motion does not modulate the air load the other driver sees, so the two stay acoustically independent under hard excursion.
The GUS-10 is rated at 500 watts RMS each in its suggested enclosure, so this cabinet is built around a 1000 watt pair. A single Proline X terminal cup is side mounted and pre wired with 12 gauge OFC. This is a raw enclosure, so how you wire the drivers from that cup is your call.
How It Is Built
Cabinet
Cut on our ShopSabre CNC from Langboard Elite MDF and assembled with dado and V groove joinery over 0.75 inch panels, with a double baffle at 1.5 inches and a full chamber divider. Angled panel meets are cut as V joints so the faces close on a machined bevel rather than a filled seam.
Mounting Pattern
The GUS-10 is in the Proline X CAD library, drawn from the manufacturer's own STEP file. The 235.3mm cutout and the nutsert locations are machined in the same operation from the same origin, so the holes cannot drift relative to each other. 8/32 threaded inserts installed at both driver positions with stainless machine screws supplied, matched to the driver's 256mm bolt circle and its eight 6.3mm holes.
Wiring and Damping
One Proline X ABS and carbon fiber composite terminal cup, side mounted, pre wired with 12 gauge OFC to both driver positions. Polyfill is installed as a light wall lining to control internal reflections without altering the acoustic volume, because adding fill density would shift the alignment off the 0.60 target.
Finish
Plush black carpet with a black acrylic badge on the woofer face.
Fitment
External dimensions are 30.25 inches wide by 13.5 inches tall, with depth running 12.25 inches at the base tapering to 7.35 inches at the top. Maximum driver mounting depth is 6.5 inches, comfortable for the GUS-10's 101.5mm requirement.
Front clearance. ResoNix specifies 23mm minimum clearance in front of each GUS-10. At 18mm of Klippel verified one way excursion that is the operational envelope of the suspension, not optional headroom. Since the drivers fire rearward into the trunk, anything you load behind the box has to stay outside that envelope. Verify both positions independently.
Enclosure Performance
Calculated from ResoNix's published Klippel measured parameters for the GUS-10 D4 coil: Fs 16.91 Hz, Qts 0.35, Vas 53.78 litres. Nothing here is estimated.
| Net Volume Per Driver | Qtc | fc | F3 | Character |
|---|---|---|---|---|
| 0.35 cu ft, ResoNix minimum | 0.887 | 42.9 Hz | 35.9 Hz | Tighter, more upper bass |
| 0.60 cu ft, this enclosure | 0.715 | 34.5 Hz | 34.2 Hz | Maximally flat. The target. |
| 0.90 cu ft, ResoNix maximum | 0.617 | 29.8 Hz | 34.8 Hz | Overdamped, F3 rises slightly |
Look at the F3 column, not the Qtc column. Across the entire usable range, from ResoNix's minimum 0.35 up to their maximum 0.90 cubic feet, F3 moves by less than two hertz, and the largest box is actually slightly higher than this one. Enclosure volume on this driver changes the shape of the response, not how deep it plays. That falls straight out of a 16.9 Hz Fs paired with a 0.35 Qts.
Why not build bigger. On the GUS-10 the largest recommended volume gives up damping and control without buying a single hertz of extension. F3 at ResoNix's 0.90 maximum is 34.8 Hz against 34.2 Hz here. You would be trading a maximally flat alignment for an overdamped one and getting nothing back.
Run your own numbers with the Sealed Box Calculator.
Full dimensions, cutout, mounting depth, and hardware details are listed under the Enclosures tab.
Cut for the GUS-10. Built in Tennessee.
Enclosure only. The ResoNix GUS-10 drivers are purchased separately from ResoNix Sound Solutions. Built to order in Tullahoma, Tennessee on our own CNC equipment. Questions on fitment or amplifier matching, call or text 931-563-5151.
| Specification | Value |
|---|---|
| Series | Proline X Performance Optimized Wedge |
| Compatible Driver | ResoNix GUS-10, quantity 2. Direct fit, no other driver |
| Configuration | Dual 10 inch, dual chamber sealed wedge |
| Mounting Position | Trunk or cargo area, tall face against the rear seat back |
| Firing Direction | Rearward into the trunk. Not a down fire design, no feet included |
| External Width | 30.25 in |
| External Height | 13.5 in at the seat face |
| External Depth | 12.25 in at the base, tapering to 7.35 in at the top |
| Internal Volume, Gross | 1.26 cu ft total, 0.63 cu ft per chamber |
| Internal Volume, Net Acoustic | 1.198 cu ft total, 0.599 cu ft per driver after 0.031 displacement |
| ResoNix Published Target | 0.60 cu ft per driver for maximally flat alignment |
| Calculated Qtc | 0.715 |
| Calculated fc | 34.5 Hz |
| Calculated F3 | 34.2 Hz, anechoic |
| Woofer Opening | 235.3mm direct fit, both positions |
| Max Mounting Depth | 6.5 in |
| Min Front Clearance | 23mm, both drivers |
| Driver Power Handling | 500 W RMS each, 1000 W combined |
| Material | Langboard Elite MDF |
| Construction | CNC cut, dado and V groove joinery |
| Panel Thickness | 0.75 in |
| Front Baffle | 1.5 in, double baffle |
| Chamber Divider | Full divider, no shared airspace |
| Driver Mounting | 8/32 threaded inserts, stainless machine screws included, 256mm bolt circle |
| Terminal Cups | One Proline X ABS and carbon fiber composite, side mounted, pre wired 12 gauge OFC to both driver positions |
| Damping | Light polyfill wall lining, does not alter acoustic volume |
| Carpet | Plush black |
| Badge | Woofer face mounted, black lasered acrylic |
| Weight | 42 lb |
| Warranty | 1 Year Limited |
| Built In | Tullahoma, Tennessee |
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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