Hifonics BRZ12D4 (Brutus 12" DVC 4ohm)

12″ subwoofer · dual 4 Ω · 600 W RMS

Fs 29 HzQts 0.44Vas 2.65 ft³Xmax 0.59″
The published specs don’t add up:

Recommended box

For a sedan, one sub, 600 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 volume1.13 ft³ (32 L)
Qtc0.80
Fc53 Hz
F3 (−3 dB, no cabin gain)51 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 14 9/16″
Open sealed box in designer

Ported

Net volume3.21 ft³ (91 L)
Tuning (Fb)30 Hz
Portslot 2 3/8 × 14 5/16″, 26 1/2″ long
Port velocity at 600 W62 ft/s
F3 (−3 dB, no cabin gain)28 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 17 5/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs29 Hz
Qts0.44
Qes0.51
Qms3
Vas2.65 ft³
Re (one coil)3.84 Ω
Sd82.8 in²
Xmax0.59″
Vd48.9 in³ calc.
Mms162 g calc.
BL14.9 T·m calc.
EBP57 — sealed or ported calc.
Sensitivity, 1 W / 1 m87.6 dB calc.

General

Size12″
Voice coilsdual 4 Ω
RMS power600 W

Mounting dimensions

Ø≈ 12 5/16″cutout ≈ Ø11 1/8″mounting depth ≈ 5 7/8″magnet Ø≈ 7 3/16″
Cutout diameter≈ 11 1/8″
Mounting depth≈ 5 7/8″

“≈” 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 Hifonics 12″ models