Hifonics BRX12D4 (Brutus 12" DVC 4ohm)

12″ subwoofer · dual 4 Ω · 450 W RMS

Fs 30.9 HzQts 0.65Vas 1.61 ft³Xmax 0.43″

Recommended box

For a sedan, one sub, 450 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 volume1.70 ft³ (48 L)
Qtc0.90
Fc43 Hz
F3 (−3 dB, no cabin gain)37 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 8 5/8″
Open sealed box in designer

Ported

Net volume2.90 ft³ (82 L)
Tuning (Fb)30 Hz
Portslot 1 15/16 × 14 5/16″, 24 9/16″ long
Port velocity at 450 W61 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 15 1/2″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs30.9 Hz
Qts0.65
Qes0.76
Qms4.4
Vas1.61 ft³
Re (one coil)3.21 Ω
Sd74.9 in²
Xmax0.43″
Vd32.4 in³ calc.
Mms192 g calc.
BL12.6 T·m calc.
EBP41 — suits sealed calc.
Sensitivity, 1 W / 1 m84.5 dB calc.

General

Size12″
Voice coilsdual 4 Ω
RMS power450 W

Mounting dimensions

Ø12 13/16″cutout Ø10 15/16″mounting depth 5 11/16″magnet Ø≈ 7 1/8″
Cutout diameter10 15/16″
Mounting depth5 11/16″
Overall diameter12 13/16″

“≈” 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