Deaf Bonce Apocalypse DB-372 D2

12″ subwoofer · dual 2 Ω · 4,000 W RMS

31 HzFs, resonance
0.44Qts
0.75 ft³Vas
0.89″Xmax
4,000 WRMS

Recommended box

For a sedan, one sub, 4,000 W. It’s the same math as the designer’s step-by-step mode, where you can fit the box to your space, vehicle and amp and get plans, a cut sheet and DXF.

Sealed

smaller, tighter
1.29 ft³ (36.5 L)
Net volume
Qtc0.55
Fc39 Hz
F3 (−3 dB, no cabin gain)54 Hz
Example box (outside)15 3/8″ × 15 3/8″ × 13 13/16″
Open sealed box in designer

Ported

deeper, louder
1.45 ft³ (41 L)
Net volume
Tuning (Fb)27 Hz
Portslot 1 15/16 × 14 3/4″, 68 15/16″ long
Port velocity at 4,000 W131 ft/s
F3 (−3 dB, no cabin gain)25 Hz
Example box (outside)31 1/2″ × 16 1/8″ × 13″

The volume and tuning are the recommendation, but the port doesn’t fit this example box. Size the box and port in the designer.

Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs31 Hz
Qts0.44
Qes0.475
Qms6
Vas0.75 ft³
Re (one coil)1.4 Ω
Sd≈ 76 in²
Xmax0.89″
EBP65 — sealed or ported calc.
Sensitivity, 1 W / 1 m83.3 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power4,000 W

Mounting dimensions

Ø≈ 13 7/16″cutout Ø12 5/16″mounting depth 11 5/16″magnet Ø≈ 8″
Cutout diameter12 5/16″
Mounting depth11 5/16″

Only Qts is published — Qms assumed to be 6 and Qes calculated (barely affects box design).

“≈” means the value isn’t in the spec sheet and a typical value for the size is used; “calc.” means it’s calculated from the published parameters. Check the manufacturer’s spec sheet before you build.

Data sources

Other Deaf Bonce 12″ models