Proline X PO15D-S W | Dual 15" Sealed Wedge Subwoofer Enclosure | Built for ResoNix GUS-15

Proline X | Performance Optimized Wedge Two GUS-15s. Trunk Mounted, the Way a Wedge Is Meant to Sit. A dual chamber sealed wedge cut for the ResoNix GUS-15 and nothing else. It sits in the trunk or cargo area with the tall face against the back of the rear seat and the drivers firing rearward, so the box uses the length of the trunk instead of standing in the middle of it. 1.35 CU FT NET PER DRIVER DUAL CHAMBER TRUNK MOUNT, REAR FIRING 3000W RMS COMBINED DUAL TERMINAL CUPS BUILT IN TULLAHOMA, TN Read This First This Is Not a Down Fire Enclosure The wedge only 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. If you need an enclosure that can run down fire, the Proline X Micro Series Dual 15 Sealed Enclosure Built for ResoNix GUS-15 is the one for that. Square stack fab cabinet, feet included, runs either orientation. Same driver, same airspace target, different build and a different place in the vehicle. Built for One Driver, at One Volume Performance Optimized enclosures are cut for a specific subwoofer rather than a size class. This one is built around the ResoNix GUS-15, and Audio Intensity is the exclusive enclosure builder for the GUS platform. ResoNix publishes 1.35 cubic feet as the volume that produces a maximally flat sealed alignment for the GUS-15. Each chamber here is built at 1.425 cubic feet gross. Subtract the driver's 0.072 cubic feet of displacement and each driver sees 1.353 cubic feet, which lands on the published target rather than near it. Total gross volume across both chambers is 2.85 cubic feet, 2.70 net acoustic. The woofer opening is cut direct fit to the GUS-15 at 355mm. There is no universal 15 inch cutout here and no attempt at one, which is the entire point of the Optimized line. A standard 15 will not work in this cabinet, both because of the opening and because the depth is built around this driver. Why a Wedge The wedge is the oldest trunk enclosure shape in car audio for a reason. It is built around what a trunk actually is, rather than dropping a rectangle into one. Packaging 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 the height back where the lid closes, so you keep usable trunk instead of losing the middle of it. Loading The Trunk Is Part of the System Firing rearward means the 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, and it is why moving a box a few inches changes what you hear. Localization 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. On a well built system that makes keeping the stage forward considerably easier. Separation Two Chambers, Two Cups Each driver gets its own sealed chamber and its own terminal cup. No internal cross chamber wiring, so you can run a monoblock per driver or bridge externally. Dual Chamber, Not Common Chamber Each GUS-15 loads into its own sealed 1.425 cubic foot chamber, isolated by a full divider. This matters at this power level. 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. It also means the two chambers can be driven separately. Each Proline X terminal cup is pre wired with 12 gauge OFC to its own driver, so the common configurations are a dedicated monoblock per driver, or a single high output amplifier bridged externally across the two terminals. The GUS-15 is rated at 1500 watts RMS each in its suggested enclosure, so this cabinet is a 3000 watt system when both chambers are driven properly. The dual amplifier path gives the cleanest channel separation and the most consistent damping at that power level. 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. This is a different construction method from the stack fab Micro Series, and the wedge geometry is the reason. The 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-15 is in the Proline X CAD library, drawn from the manufacturer's own CAD file. The cutout and the nutsert locations are machined in the same operation from the same origin on the router, so the holes cannot drift relative to each other. 8/32 threaded inserts are installed at both driver positions with stainless machine screws supplied, matched to the driver's 375mm bolt circle. Wiring and Damping Two Proline X ABS and carbon fiber composite terminal cups, side mounted, one per chamber, each pre wired with 12 gauge OFC. Polyfill is installed as a light wall lining to control internal reflections without altering the acoustic volume, because ResoNix calculated the target at 1.35 cubic feet and adding fill density would shift the alignment off it. Finish Dark gray trunk liner standard, plush black available. The lasered acrylic badge mounts on the woofer face. Fitment External dimensions are 36 inches wide by 17.5 inches tall, with the depth running 16.5 inches at the base and tapering to 10 inches at the top. Installed, the 17.5 inch face stands against the rear seat back and the cabinet slopes away toward the trunk lid. Measure the floor, then the lid. The 16.5 inch base depth and the 36 inch width are what has to clear on the trunk floor. The taper is there so the lid closes over the shallow end, but check your own lid line, since trunk openings vary far more than trunk floors do. Front clearance. ResoNix specifies a 33mm minimum clearance in front of each GUS-15. At 25.89mm of Klippel verified one way excursion that figure is the operational envelope of the suspension, not optional headroom. Nothing should sit inside it, including cargo you expect to load behind the box. Verify both driver positions independently. Enclosure Performance These figures are calculated from ResoNix's own published Klippel measured parameters for the GUS-15 D4 coil: Fs 17.11 Hz, Qts 0.34, Vas 117.47 litres. Nothing here is estimated. Volume Per Driver Qtc fc F3 Character 0.80 cu ft, ResoNix minimum 0.846 42.6 Hz 36.7 Hz Tighter, more upper bass emphasis 1.35 cu ft, this enclosure 0.686 34.5 Hz 35.6 Hz Maximally flat. The target. 2.00 cu ft, ResoNix maximum 0.596 30.0 Hz 36.6 Hz Overdamped, softer, more headroom -3 dB 0 dB 20 30 50 100 200 Frequency (Hz) +4 -5 -10 -15 ResoNix GUS-15, per driver. Anechoic half-space, no cabin gain. 1.35 cu ft, this enclosure 0.80 cu ft and 2.00 cu ft The thing the curves actually show. Look at the F3 column, not the Qtc column. Across the entire usable range, from ResoNix's minimum 0.8 up to their maximum 2.0 cubic feet, F3 moves less than two hertz. Enclosure volume on this driver changes the shape of the response, not how deep it plays. Going bigger does not buy extension. It buys damping and headroom, and it costs you upper bass. That is unusual, and it is a direct result of an Fs of 17 Hz paired with a Qts of 0.34. Why we built at 1.35. The small box gains upper bass emphasis and the large box gains control, and neither gains bottom end. 1.35 cubic feet sits at the maximally flat point between them, which is why it is ResoNix's own published recommendation. They designed the driver, and this is the alignment they built it around. What flat means in a trunk. These figures are anechoic. Installed in a vehicle, cabin transfer function lifts the bottom octave regardless of alignment, and a rear firing trunk mount adds the loading of the trunk itself on top of that. In practice the in-car response will be considerably warmer than the curve above. 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-15. Built in Tennessee. Enclosure only. The ResoNix GUS-15 drivers are purchased separately from ResoNix Sound Solutions. Every Performance Optimized Wedge is built to order in Tullahoma, Tennessee on our own CNC equipment. Questions on fitment or amplifier matching, call or text 931-563-5151.