Deaf Bonce Apocalypse DB-312 D2

12″ subwoofer · dual 2 Ω · 3,000 W RMS

Fs 32 HzQts 0.48Vas 0.88 ft³Xmax 0.98″

Recommended box

For a sedan, one sub, 3,000 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

Net volume1.24 ft³ (35 L)
Qtc0.63
Fc42 Hz
F3 (−3 dB, no cabin gain)49 Hz
Example box (outside)15 3/8″ × 15 3/8″ × 13 3/8″
Open sealed box in designer

Ported

Net volume1.62 ft³ (46 L)
Tuning (Fb)29 Hz
Portround port Ø2 1/2″, 7 15/16″ long
Port velocity at 3,000 W723 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)18 5/8″ × 16 1/8″ × 13 3/8″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs32 Hz
Qts0.48
Qes0.522
Qms6
Vas0.88 ft³
Re (one coil)1.4 Ω
Sd≈ 76 in²
Xmax0.98″
EBP61 — sealed or ported calc.
Sensitivity, 1 W / 1 m83.9 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power3,000 W

Mounting dimensions

Ø≈ 13 7/16″cutout Ø12 5/16″mounting depth 10 13/16″magnet Ø≈ 8″
Cutout diameter12 5/16″
Mounting depth10 13/16″

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