Performance Optimized Wedge Sealed 12" Enclosure American Bass Hawk Slim 12 · Single 12" Sealed enclosure

The HAWKSLIM-1244, yes: the baffle is cut to its 10.9 in cutout, the recess to its 12.7 in overall diameter, and its 3.54 in motor clears the cabinet with 2.28 in to spare. This box is for the HAWKSLIM-1244, the dual 4 ohm Hawk Slim 12. American Bass lists different mounting figures for the dual 2 ohm HAWKSLIM-1222 and publishes no parameters for it, so it is not covered by this alignment.

Any other 12, no. The airspace is worked out from the Hawk Slim 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.

The Hawk Slim 12 has a Qts of 0.713, already above the 0.707 of a maximally flat alignment, so no sealed box of any size makes it flat: a sealed box only raises Qtc above the driver's own Qts. Getting it down to 0.8 would take 4.6 cubic feet, far beyond a trunk wedge. This cabinet is built to 1.25 cubic feet net, which puts it at Qtc 1.00: full and punchy, with a lift near 52 Hz before the rolloff. American Bass's own sealed box for the HAWKSLIM-1244 is 1.453 cubic feet net, which reads Qtc 0.96; ours is a slightly smaller box with a little more punch.

Treat the figures as good to a few hundredths: the displacement is our estimate, since American Bass publishes none.

American Bass rates the Hawk Slim 12 at 900 watts RMS, but that is a thermal rating. Its published one-way Xmax is 8.5 mm, and in this sealed box the cone reaches it at about 210 watts, worst near 36 Hz. Plan on an amplifier of about 210 watts RMS for clean output; more power past that point adds distortion and stress, not low end. A larger sealed box does not help: in American Bass's own 1.453 cubic feet the cone reaches Xmax at about 190 watts. If you want to use the full 900 watts, a ported box is the better match for this driver.

The HAWKSLIM-1244 has two 4 ohm coils: 8 ohms in series or 2 ohms in parallel. 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 41.2 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 12 inch woofer puts on it at 900 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, so the driver bolts to the inner layer and sits flush with the gloss black acrylic insert.

Anechoic F3 is 41.2 Hz, with system resonance at 52.4 Hz. Above Qtc 0.707 the response carries a lift near resonance, so F3 sits below fc and the box sounds fuller than a flat alignment.

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 1.25 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: American Bass prints no bolt circle for the Hawk Slim 12, so you set the driver in the recess, mark its holes, drill and press the inserts. The driver is purchased separately.