Performance Optimized Wedge Sealed 10" Enclosure Ground Zero GZRW 250-D2 FLAT · Single 10" Sealed enclosure

The GZRW 250-D2 FLAT, yes, in the dual 2 ohm version. The baffle is cut to 9.13 in, Ground Zero's published cutout, under the 10.87 in frame. The 3.35 inch motor clears the cabinet with 2.03 inch to spare.

Any other 10, no. The airspace is engineered around the GZRW 250-D2 FLAT's own Qts and Vas, and a different woofer that happened to drop into the hole would not see the alignment printed on this page.

1.00 cubic feet net on Ground Zero's published figures: the dual 2 ohm reads Qtc 0.813 with resonance at 42.1 Hz and half power at 37.4 Hz. Ground Zero publishes no sealed volume for the GZRW 250-D2 FLAT. A maximally flat box would take 1.77 cubic feet, a 10 inch cabinet deeper than it is tall, for barely half a hertz more extension, so this one is built at 1.0 cubic foot: the same reach in a box that fits. That is a touch above maximally flat: a small lift near resonance and firm midbass.

Cabinet gain in a vehicle lifts the bottom end further, so in the car this reads deeper than the anechoic figures.

Ground Zero rates the GZRW 250-D2 FLAT at 400 watts RMS, so target 280 to 400 watts RMS at the final load.

Ground Zero sells the GZRW 250-D2 FLAT as dual 2 ohm: the dual 2 ohm is two 2 ohm coils, 4 ohms in series or 1 ohm in parallel. A parallel load at or under 1 ohm needs an amplifier rated for it. Confirm your amplifier's minimum stable impedance first.

The seat-side face carries a 20 degree rake that matches the lean of a factory rear seat back, so the cabinet sits flush against it and the cargo space in front stays usable. The baffle is the vertical trunk-lid-side face, so the driver fires rearward into the trunk cavity.

The trunk acts as an acoustic extension for the sealed box, and the cabin adds real output below 50 Hz, so in-vehicle response runs deeper than the anechoic 37.4 Hz on this page.

The baffle is two bonded 3/4 inch sheets, 1.5 inches through. A single 3/4 inch panel flexes under the pressure a 10 inch woofer puts on it at 400 watts, which smears output and works the driver loose over time; the second layer stiffens the face and gives the mounting hardware twice the material to bite.

The outer layer is machined as a flush recess to Ground Zero's 10.87 inch frame, so the driver bolts to the inner layer and sits flush with the gloss black acrylic insert.

Anechoic F3 is 37.4 Hz. Above Qtc 0.707 F3 sits below fc, so the response carries a small lift near resonance before it rolls off.

Those figures exclude cabin gain. In a car the cabin's transfer function adds real output below 50 Hz, so in-vehicle response runs deeper than the numbers above.

No. Polyfill is already installed as a light wall lining to control internal reflections, and the quantity is chosen so it does not change the acoustic volume.

Do not add more. Packing a sealed box with fill makes it behave as though it were larger, which walks the alignment away from the 1.00 cubic feet this cabinet was built to.

No driver. This is an enclosure only. You receive the cabinet finished in plush black carpet with the gloss black acrylic baffle insert, one side-mounted pre-wired terminal cup, the polyfill lining already in place, and a threaded insert kit with stainless machine screws.

The inserts ship loose on purpose: Ground Zero prints no bolt circle for the GZRW 250-D2 FLAT, so you set the driver in the recess, mark its holes, drill and press the inserts. The Ground Zero GZRW 250-D2 FLAT is purchased separately, and the cabinet is cut direct fit to it, not a general purpose 10 inch box.