Bomber Slim High Power 400W 4 Ohm (SW12SLHP-400-4)

12″ subwoofer · 4 Ω · 400 W RMS

Fs 34 HzQts 0.99Vas 1.84 ft³Xmax 0.24″

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 volume1.80 ft³ (51 L)
Qtc1.41
Fc48 Hz
F3 (−3 dB, no cabin gain)35 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 9 1/16″
Open sealed box in designer

Ported

Net volume3.04 ft³ (86 L)
Tuning (Fb)37 Hz
Portslot 1 3/4 × 14 5/16″, 12 3/16″ long
Port velocity at 400 W64 ft/s
F3 (−3 dB, no cabin gain)30 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 14 15/16″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs34 Hz
Qts0.99
Qes1.11
Qms9.1
Vas1.84 ft³
Re4.3 Ω
Sd78.6 in²
Xmax0.24″
Vd18.6 in³ calc.
Mms153 g calc.
BL11.2 T·m calc.
EBP31 — suits sealed calc.
Sensitivity, 1 W / 1 m84.7 dB calc.

General

Size12″
Voice coils4 Ω
RMS power400 W

Mounting dimensions

Ø12 5/16″cutout ≈ Ø11 1/8″mounting depth 3 11/16″magnet Ø5 1/4″
Cutout diameter≈ 11 1/8″
Mounting depth3 11/16″
Overall diameter12 5/16″
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 12″ models