Performance Optimized Wedge Wide Sealed Dual 12" Enclosure Kicker CompQ 12 · Dual 12" Sealed enclosure

Yes, both coils: the 51CWQ122 and 51CWQ124 share the 12-1/2 in frame, the 11-1/16 in cutout and the 7-1/8 in mounting depth, and the motor clears the cabinet with 1.94 in to spare. One cabinet serves both coils: the 51CWQ122 reads Qtc 0.708 with half power at 43.2 Hz, and the 51CWQ124 reads Qtc 0.787 at 42.0 Hz. Run two of the same coil so the chambers match.

Any other 12, no. The airspace is worked out from the CompQ 12'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.

1.35 cubic feet net per chamber puts the 2 ohm CompQ 12 on Qtc 0.708, maximally flat, with system resonance at 43.3 Hz and half power at 43.2 Hz. The 4 ohm version has a higher Qts on the same cone and reads Qtc 0.787 in the same box, fc 46.2 Hz, F3 42.0 Hz: a small lift near resonance and firmer midbass. Kicker's own sealed range is 0.88 to 2.0 cubic feet including the driver, Qtc 0.67 to 0.82 on the 2 ohm, and this cabinet sits inside it.

Kicker publishes no driver displacement for the CompQ 12, so 0.15 cubic feet per driver is an estimate, the same figure the single version of this cabinet carries, and it is taken out of the net figure.

Kicker rates the CompQ 12 at 1000 watts RMS per driver, so target 700 to 1000 watts RMS per driver at the final load, 1400 to 2000 across the pair.

A pair of 51CWQ122 (dual 2 ohm) lands on 2 ohms with each woofer's coils in series and the two woofers in parallel, or 8 ohms all in series; all four coils in parallel is 0.5 ohm, which no amplifier should see. A pair of 51CWQ124 (dual 4 ohm) lands on 4 ohms with each woofer's coils in series and the woofers in parallel, or 1 ohm with everything in parallel. Use 1 ohm only if your amplifier is rated 1 ohm stable; otherwise the series options are the safe default. Run a matched pair, both 2 ohm or both 4 ohm. Confirm your amplifier's minimum stable impedance first.

41 inches across lets two 12 inch drivers sit side by side while the cabinet stays 15.38 inches deep at the base, so it spans a cargo floor instead of eating into it. The back panel rakes 20 degrees to sit flush against the rear seat.

The cargo area 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 43.2 Hz on this page.

Two drivers sharing one sealed volume load each other: each driver's compression stroke becomes the pressure the other works against, which blurs the alignment either would have alone. A bonded full-height 3/4 inch divider gives each driver its own 1.35 cubic feet and its own polyfill.

It also means a failure in one driver does not unload the other, and the alignment on this page is the alignment in each chamber, not an average across a shared box.

Anechoic F3 is 43.2 Hz per chamber on the 2 ohm at Qtc 0.708, and 42.0 Hz on the 4 ohm at Qtc 0.787. Above Qtc 0.707 F3 sits below fc, so the 4 ohm carries a small lift near its 46.2 Hz resonance before it rolls off.

Those figures exclude cabin gain. In a vehicle 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 in both chambers 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 1.35 cubic feet per chamber this cabinet was built to.

No drivers. 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 to both positions, the polyfill lining already in place, threaded inserts pressed at every mounting location and stainless machine screws.

The pair of Kicker CompQ 12 is purchased separately, and the cabinet is cut direct fit to it, not a general purpose 12 inch box.