Deaf Bonce Apocalypse DB-3515R D2

15″ subwoofer · dual 2 Ω · 3,500 W RMS

Fs 32.3 HzQts 0.39Vas 2.44 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 volume1.59 ft³ (45 L)
Qtc0.62
Fc51 Hz
F3 (−3 dB, no cabin gain)62 Hz
Example box (outside)17 5/16″ × 17 5/16″ × 13 1/2″
Open sealed box in designer

Ported

Net volume2.44 ft³ (69 L)
Tuning (Fb)35 Hz
Portslot 3 15/16 × 16 11/16″, 52 3/16″ long
Port velocity at 3,500 W75 ft/s
F3 (−3 dB, no cabin gain)33 Hz
Example box (outside)31 1/2″ × 18 1/8″ × 18 1/8″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs32.3 Hz
Qts0.39
Qes0.417
Qms6
Vas2.44 ft³
Re (one coil)≈ 1.7 Ω
Sd≈ 124 in²
Xmax0.89″
EBP77 — sealed or ported calc.
Sensitivity, 1 W / 1 m89.5 dB calc.

General

Size15″
Voice coilsdual 2 Ω
RMS power3,500 W

Mounting dimensions

Ø≈ 15 3/16″cutout Ø14″mounting depth 11″magnet Ø≈ 9 1/16″
Cutout diameter14″
Mounting depth11″

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