Bomber B-One 200W 2+2 Ohm (SW12BONE-200-2+2)

12″ subwoofer · dual 2 Ω · 200 W RMS

Fs 29.1 HzQts 1.25Vas 3.16 ft³Xmax 0.28″

Recommended box

For a sedan, one sub, 200 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 volume1.84 ft³ (52 L)
Qtc2.07
Fc48 Hz
F3 (−3 dB, no cabin gain)33 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 9 3/16″
Open sealed box in designer

Ported

Net volume3.14 ft³ (89 L)
Tuning (Fb)42 Hz
Portslot 1 9/16 × 14 5/16″, 6 15/16″ long
Port velocity at 200 W58 ft/s
F3 (−3 dB, no cabin gain)34 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 14 15/16″
Open ported box in designer
2030405060801001502007278849096102HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs29.1 Hz
Qts1.25
Qes1.44
Qms9.66
Vas3.16 ft³
Re (one coil)1.83 Ω
Sd81.1 in²
Xmax0.28″
Vd22.3 in³ calc.
Mms129 g calc.
BL5.5 T·m calc.
EBP20 — suits sealed calc.
Sensitivity, 1 W / 1 m83.9 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power200 W

Mounting dimensions

Ø12 1/16″cutout ≈ Ø10 13/16″mounting depth 5 9/16″magnet Ø5 1/4″
Cutout diameter≈ 10 13/16″
Mounting depth5 9/16″
Overall diameter12 1/16″
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