Deaf Bonce Apocalypse DB-SA272 D1

12″ subwoofer · dual 1 Ω · 1,500 W RMS

Fs 30.6 HzQts 0.34Vas 1.04 ft³Xmax 0.71″

Recommended box

For a sedan, one sub, 1,500 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 volume0.71 ft³ (20 L)
Qtc0.53
Fc48 Hz
F3 (−3 dB, no cabin gain)70 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 10 1/16″
Open sealed box in designer

Ported

Net volume1.45 ft³ (41 L)
Tuning (Fb)29 Hz
Port2 round ports Ø2 1/2″, 20 1/16″ long
Port velocity at 1,500 W248 ft/s
F3 (−3 dB, no cabin gain)28 Hz
Example box (outside)26 1/2″ × 15 3/4″ × 9 5/8″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs30.6 Hz
Qts0.34
Qes0.36
Qms6
Vas1.04 ft³
Re (one coil)≈ 0.85 Ω
Sd≈ 76 in²
Xmax0.71″
EBP85 — sealed or ported calc.
Sensitivity, 1 W / 1 m85.7 dB calc.

General

Size12″
Voice coilsdual 1 Ω
RMS power1,500 W

Mounting dimensions

Ø≈ 12 3/16″cutout Ø11″mounting depth 7 1/16″magnet Ø≈ 7 1/8″
Cutout diameter11″
Mounting depth7 1/16″

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