Bomber B-One 200W 2+2 Ohm (SW8BONE-200-2+2)

8″ subwoofer · dual 2 Ω · 200 W RMS

Fs 44 HzQts 0.92Vas 0.50 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 volume0.74 ft³ (21 L)
Qtc1.19
Fc57 Hz
F3 (−3 dB, no cabin gain)43 Hz
Example box (outside)10 5/8″ × 10 5/8″ × 17 1/4″
Open sealed box in designer

Ported

Net volume1.27 ft³ (36 L)
Tuning (Fb)39 Hz
Portslot 1 9/16 × 14 5/16″, 27 1/4″ long
Port velocity at 200 W38 ft/s
F3 (−3 dB, no cabin gain)32 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 8 5/8″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs44 Hz
Qts0.92
Qes1.11
Qms5.4
Vas0.50 ft³
Re (one coil)1.82 Ω
Sd33.2 in²
Xmax0.28″
Vd9.1 in³ calc.
Mms60 g calc.
BL5.2 T·m calc.
EBP40 — suits sealed calc.
Sensitivity, 1 W / 1 m82.3 dB calc.

General

Size8″
Voice coilsdual 2 Ω
RMS power200 W

Mounting dimensions

Ø8 1/8″cutout ≈ Ø7 5/16″mounting depth 4 1/4″magnet Ø5 1/4″
Cutout diameter≈ 7 5/16″
Mounting depth4 1/4″
Overall diameter8 1/8″
Magnet diameter5 1/4″

Judging by its value, the published Re is for both coils in series — converted to per coil.

“≈” 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 8″ models