Bomber Upgrade Professional 400W 4 Ohm (SW15UP400-4)

15″ subwoofer · 4 Ω · 400 W RMS

Fs 26 HzQts 0.66Vas 10.38 ft³Xmax 0.37″

Recommended box

For a sedan, one sub, 400 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 volume3.04 ft³ (86 L)
Qtc1.40
Fc55 Hz
F3 (−3 dB, no cabin gain)41 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 12 3/4″
Open sealed box in designer

Ported

Net volume5.12 ft³ (145 L)
Tuning (Fb)41 Hz
Portslot 1 15/16 × 16 5/16″, 5 5/16″ long
Port velocity at 400 W64 ft/s
F3 (−3 dB, no cabin gain)38 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 20 1/2″
Open ported box in designer
2030405060801001502007278849096102HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs26 Hz
Qts0.66
Qes0.77
Qms4.81
Vas10.38 ft³
Re3.3 Ω
Sd132.5 in²
Xmax0.37″
Vd49.6 in³ calc.
Mms132 g calc.
BL9.6 T·m calc.
EBP34 — suits sealed calc.
Sensitivity, 1 W / 1 m90.3 dB calc.

General

Size15″
Voice coils4 Ω
RMS power400 W

Mounting dimensions

Ø15 1/8″cutout ≈ Ø13 5/8″mounting depth 6 5/8″magnet Ø5 1/4″
Cutout diameter≈ 13 5/8″
Mounting depth6 5/8″
Overall diameter15 1/8″
Magnet diameter5 1/4″

“≈” 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 Bomber 15″ models