PowerBass M-1504

15″ subwoofer · 4 Ω · 425 W RMS

Fs 22.5 HzQts 0.44Vas 6.42 ft³Xmax 0.43″

Recommended box

For a sedan, one sub, 425 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 volume2.75 ft³ (78 L)
Qtc0.81
Fc41 Hz
F3 (−3 dB, no cabin gain)39 Hz
Example box (outside)31 1/2″ × 18 1/8″ × 11 1/2″
Open sealed box in designer

Ported

Net volume4.66 ft³ (132 L)
Tuning (Fb)29 Hz
Portslot 1 15/16 × 16 11/16″, 17 11/16″ long
Port velocity at 425 W60 ft/s
F3 (−3 dB, no cabin gain)27 Hz
Example box (outside)31 1/2″ × 18 1/8″ × 19 9/16″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs22.5 Hz
Qts0.44
Qes0.5
Qms3.81
Vas6.42 ft³
Re3.2 Ω
Sd120.8 in²
Xmax0.43″
Vd52.3 in³ calc.
Mms237 g calc.
BL14.6 T·m calc.
EBP45 — suits sealed calc.
Sensitivity, 1 W / 1 m88.2 dB calc.

General

Size15″
Voice coils4 Ω
RMS power425 W

Mounting dimensions

Ø≈ 15 3/16″cutout Ø14″mounting depth 6 1/2″magnet Ø≈ 9 1/16″
Cutout diameter14″
Mounting depth6 1/2″

“≈” 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 PowerBass 15″ models