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

The M15D-S GUS is the top of the Micro Series lineup. Two ResoNix GUS-15 drivers in separate, acoustically isolated sealed chambers, each delivering exactly 1.35 cubic feet of net acoustic airspace per driver after the 0.072 cubic foot GUS-15 displacement is accounted for. Both chambers are identical, both drivers see identical acoustic conditions, and both produce identical T/S response curves. This is ResoNix's published 0.707 Qtc target hit precisely on both drivers simultaneously.

The volume is calculated the same way as every other Proline X Micro Series build: by summing every CNC-cut layer's individual opening on both sides of the chamber divider, not by assuming an internal cavity based on external dimensions minus wall thickness. The number listed is the actual net acoustic airspace each GUS-15 loads into once installed. No one else in this industry calculates enclosure volume this way. The 1.35 cubic foot per-driver figure is exact, not approximate.

Construction on this enclosure is scaled up from the standard Micro Series spec across every structural element. The exterior walls are 1-inch thick Langboard Elite MDF, thicker than the 3/4-inch panels used elsewhere in the series. Panel rigidity scales with the cube of thickness, so moving from 3/4-inch to 1-inch produces a substantially stiffer wall than the numerical difference alone suggests. At 3,000 watts RMS combined driver output the structural demands justify the additional thickness across the entire enclosure shell. The front baffle is a double-face 1.5-inch build: two bonded layers of Langboard Elite combined into a single rigid panel with both GUS-15 drivers flush-mounted into the baffle. Flush-mounting eliminates the frame-lip resonance surface-mounted drivers can develop at high-excursion listening levels and produces a cleaner airflow path across the front of the cones.

The chamber divider is CNC-cut at the same 1-inch thickness as the exterior walls and sits between the two driver chambers to keep each acoustic volume completely independent. Internal bracing is integrated into the panel layering to control diaphragm-driven wall flex under sustained high-power operation. This is stack-fab construction throughout: every panel is individually CNC-cut and stacked layer by layer, and the layer stack itself is the structural bond. Between-layer dowels add tension reinforcement that locks the panel stack against shear movement independent of adhesive condition. Corners are radiused at 3 inches viewed top-down, which is standard across the entire Micro Series. The radiused corners break up the parallel-wall geometry that creates internal standing waves and produce an organic finished shape that fits cleanly against vehicle interior surfaces without sharp corners catching on trim or upholstery. The area directly behind each driver's magnet is precision-milled to allow fine volume adjustment and, more importantly, to maintain open area immediately behind each driver's pole vent so backpressure does not interfere with voice coil cooling airflow.

The dual configuration is the right call when a single GUS-15 is not enough output for the install or when the installation footprint accommodates the larger enclosure. Two GUS-15 drivers produce roughly 3 dB more low-frequency output than a single GUS-15 at equivalent power, and combined thermal capacity is 3,000 watts RMS. At 25.89mm of Klippel-verified one-way Xmax per driver combined across 1,608 cm2 of effective cone area, this is the highest-output enclosure in the Proline X Micro Series lineup. There is no comparable shallow-mount dual 15-inch build at this depth class.

External dimensions are 38 inches wide, 12 inches tall, and 18 inches deep in downfire orientation before adding the 1.75-inch downfire feet. Total installed height in downfire mode is 13.75 inches. The 1.75-inch feet couple the enclosure to the vehicle floor across the full 38-inch width for even bass distribution across the cabin. Finished weight is 75 pounds and this enclosure ships freight, not standard ground. Contact Audio Intensity directly for freight quotes on residential deliveries with lift gate requirements.

The 33mm minimum front clearance ResoNix specifies applies at both driver positions the same as the single GUS-15 build. At 25.89mm of Xmax this clearance is the operating envelope of the suspension and is not optional headroom. Verify against seat cushion, cargo cover, vehicle floor in downfire orientation, or any other surface positioned in front of either driver before finalizing the install. Surround contact at full excursion causes mechanical damage that is not covered under warranty.

Each chamber has its own dedicated Proline X ABS/carbon fiber terminal cup with stainless steel hardware and copper ring terminals, pre-wired internally to its own driver position with 12-gauge OFC. Independent connection paths, no cross-chamber wiring. This gives complete flexibility in amplifier configuration: run each driver from its own monoblock for maximum power and channel separation, or bridge both into a single high-output amplifier with external wiring. For the D4 wired parallel per driver, each terminal cup sees 2 ohms. For the D2 wired parallel per driver, each terminal cup sees 1 ohm and requires an amplifier explicitly rated for sustained 1-ohm operation. D2 T/S parameters are not yet finalized by ResoNix, so confirm before selecting the D2 variant. For most builds, D4 wired parallel per driver (2 ohms each terminal cup) into separate 2-ohm-stable monoblocks delivering 1,200 to 1,500 watts RMS per driver is the practical target. Do not significantly exceed 1,500 watts RMS per driver. ResoNix is explicit that overpower damage is not covered under warranty.