Deaf Bonce Apocalypse DB-375 D2

15″ subwoofer · dual 2 Ω · 4,000 W RMS

Fs 29 HzQts 0.47Vas 2.11 ft³Xmax 0.89″

Recommended box

For a sedan, one sub, 4,000 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 volume1.82 ft³ (51.5 L)
Qtc0.69
Fc43 Hz
F3 (−3 dB, no cabin gain)46 Hz
Example box (outside)18 1/8″ × 18 1/8″ × 13 13/16″
Open sealed box in designer

Ported

Net volume3.64 ft³ (103 L)
Tuning (Fb)27 Hz
Portslot 3 15/16 × 17 1/2″, 62 1/2″ long
Port velocity at 4,000 W85 ft/s
F3 (−3 dB, no cabin gain)25 Hz
Example box (outside)31 1/2″ × 18 7/8″ × 23 1/4″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs29 Hz
Qts0.47
Qes0.51
Qms6
Vas2.11 ft³
Re (one coil)1.4 Ω
Sd≈ 124 in²
Xmax0.89″
EBP57 — sealed or ported calc.
Sensitivity, 1 W / 1 m86.6 dB calc.

General

Size15″
Voice coilsdual 2 Ω
RMS power4,000 W

Mounting dimensions

Ø≈ 15 15/16″cutout Ø14 3/4″mounting depth 11 5/16″magnet Ø≈ 9 5/8″
Cutout diameter14 3/4″
Mounting depth11 5/16″

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 15″ models