Deaf Bonce Apocalypse DB-3512R D1

12″ subwoofer · dual 1 Ω · 3,500 W RMS

Fs 32.5 HzQts 0.39Vas 1.02 ft³Xmax 0.89″

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 volume0.90 ft³ (25.5 L)
Qtc0.57
Fc47 Hz
F3 (−3 dB, no cabin gain)64 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 12 1/8″
Open sealed box in designer

Ported

Net volume1.45 ft³ (41 L)
Tuning (Fb)31 Hz
Portround port Ø2 1/2″, 7 3/4″ long
Port velocity at 3,500 W755 ft/s
F3 (−3 dB, no cabin gain)29 Hz
Example box (outside)19 3/8″ × 15 3/4″ × 12″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs32.5 Hz
Qts0.39
Qes0.417
Qms6
Vas1.02 ft³
Re (one coil)≈ 0.85 Ω
Sd≈ 76 in²
Xmax0.89″
EBP78 — sealed or ported calc.
Sensitivity, 1 W / 1 m85.8 dB calc.

General

Size12″
Voice coilsdual 1 Ω
RMS power3,500 W

Mounting dimensions

Ø≈ 12 3/8″cutout Ø11 3/16″mounting depth 9 5/8″magnet Ø≈ 7 1/4″
Cutout diameter11 3/16″
Mounting depth9 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