Deaf Bonce Apocalypse DB-SA412 D2

12″ subwoofer · dual 2 Ω · 3,500 W RMS

Fs 32 HzQts 0.39Vas 2.44 ft³Xmax 1.26″

Recommended box

For a sedan, one sub, 3,500 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 volume0.97 ft³ (27.5 L)
Qtc0.73
Fc60 Hz
F3 (−3 dB, no cabin gain)62 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 12 7/8″
Open sealed box in designer

Ported

Net volume2.44 ft³ (69 L)
Tuning (Fb)34 Hz
Portslot 4 1/2 × 14 5/16″, 54 15/16″ long
Port velocity at 3,500 W75 ft/s
F3 (−3 dB, no cabin gain)33 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 20 13/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs32 Hz
Qts0.39
Qes0.417
Qms6
Vas2.44 ft³
Re (one coil)1.4 Ω
Sd≈ 76 in²
Xmax1.26″
EBP77 — sealed or ported calc.
Sensitivity, 1 W / 1 m89.3 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power3,500 W

Mounting dimensions

Ø≈ 12 5/16″cutout Ø11 1/8″mounting depth 10 3/8″magnet Ø≈ 7 1/4″
Cutout diameter11 1/8″
Mounting depth10 3/8″

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