Hifonics BRZ15D4 (Brutus 15" DVC 4ohm)

15″ subwoofer · dual 4 Ω · 600 W RMS

Fs 21 HzQts 0.50Vas 7.06 ft³Xmax 0.61″

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 volume2.83 ft³ (80 L)
Qtc0.93
Fc39 Hz
F3 (−3 dB, no cabin gain)34 Hz
Example box (outside)31 1/2″ × 18 1/8″ × 11 3/4″
Open sealed box in designer

Ported

Net volume4.80 ft³ (136 L)
Tuning (Fb)29 Hz
Portslot 2 3/16 × 16 11/16″, 18 15/16″ long
Port velocity at 600 W63 ft/s
F3 (−3 dB, no cabin gain)27 Hz
Example box (outside)31 1/2″ × 18 1/8″ × 20 1/4″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs21 Hz
Qts0.50
Qes0.58
Qms3.5
Vas7.06 ft³
Re (one coil)3.84 Ω
Sd124 in²
Xmax0.61″
Vd75.7 in³ calc.
Mms260 g calc.
BL15.1 T·m calc.
EBP36 — suits sealed calc.
Sensitivity, 1 W / 1 m87 dB calc.

General

Size15″
Voice coilsdual 4 Ω
RMS power600 W

Mounting dimensions

Ø≈ 15 3/16″cutout ≈ Ø14″mounting depth ≈ 7 1/16″magnet Ø≈ 9 1/16″
Cutout diameter≈ 14″
Mounting depth≈ 7 1/16″

“≈” 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 15″ models