Deaf Bonce Apocalypse DB-SA312 D2

12″ subwoofer · dual 2 Ω · 2,800 W RMS

Fs 33 HzQts 0.42Vas 2.51 ft³Xmax 1.10″

Recommended box

For a sedan, one sub, 2,800 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 volume1.01 ft³ (28.5 L)
Qtc0.79
Fc62 Hz
F3 (−3 dB, no cabin gain)60 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 13 1/4″
Open sealed box in designer

Ported

Net volume2.93 ft³ (83 L)
Tuning (Fb)34 Hz
Portslot 5 5/16 × 14 5/16″, 52 7/8″ long
Port velocity at 2,800 W63 ft/s
F3 (−3 dB, no cabin gain)32 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 23 3/4″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs33 Hz
Qts0.42
Qes0.452
Qms6
Vas2.51 ft³
Re (one coil)1.4 Ω
Sd≈ 76 in²
Xmax1.10″
EBP73 — sealed or ported calc.
Sensitivity, 1 W / 1 m89.5 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power2,800 W

Mounting dimensions

Ø≈ 12 3/8″cutout Ø11 3/16″mounting depth 10 13/16″magnet Ø≈ 7 1/4″
Cutout diameter11 3/16″
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