Deaf Bonce Apocalypse DB-SA252 D1

12″ subwoofer · dual 1 Ω · 1,000 W RMS

Fs 32.1 HzQts 0.36Vas 0.87 ft³Xmax 0.59″

Recommended box

For a sedan, one sub, 1,000 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 volume0.71 ft³ (20 L)
Qtc0.54
Fc48 Hz
F3 (−3 dB, no cabin gain)69 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)28 Hz
Port2 round ports Ø2 1/2″, 21 5/8″ long
Port velocity at 1,000 W202 ft/s
F3 (−3 dB, no cabin gain)27 Hz
Example box (outside)28 9/16″ × 15 3/4″ × 9 1/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs32.1 Hz
Qts0.36
Qes0.383
Qms6
Vas0.87 ft³
Re (one coil)≈ 0.85 Ω
Sd≈ 76 in²
Xmax0.59″
EBP84 — sealed or ported calc.
Sensitivity, 1 W / 1 m85.3 dB calc.

General

Size12″
Voice coilsdual 1 Ω
RMS power1,000 W

Mounting dimensions

Ø≈ 12 3/16″cutout Ø11″mounting depth 6 5/8″magnet Ø≈ 7 1/8″
Cutout diameter11″
Mounting depth6 5/8″

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