American Bass GODZILLA-1211

12″ subwoofer · dual 1 Ω · 4,700 W RMS

Fs 37 HzQts 0.43Vas 0.31 ft³Xmax 0.89″

Recommended box

For a sedan, one sub, 4,700 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 volume0.97 ft³ (27.5 L)
Qtc0.49
Fc42 Hz
F3 (−3 dB, no cabin gain)68 Hz
Example box (outside)14 9/16″ × 14 9/16″ × 12 3/16″
Open sealed box in designer

Ported

Net volume1.45 ft³ (41 L)
Tuning (Fb)25 Hz
Portround port Ø2 1/2″, 12 7/8″ long
Port velocity at 4,700 W869 ft/s
F3 (−3 dB, no cabin gain)23 Hz
Example box (outside)19 1/2″ × 15 3/4″ × 12 3/16″
Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs37 Hz
Qts0.43
Qes0.46
Qms6.79
Vas0.31 ft³
Re (one coil)1 Ω
Sd76 in²
Xmax0.89″
Vd67.3 in³ calc.
Mms723 g calc.
BL19.1 T·m calc.
EBP80 — sealed or ported calc.
Sensitivity, 1 W / 1 m81.8 dB calc.

General

Size12″
Voice coilsdual 1 Ω
RMS power4,700 W

Mounting dimensions

Ø≈ 12 1/2″cutout Ø11 5/16″mounting depth 9 5/8″magnet Ø≈ 7 3/8″
Cutout diameter11 5/16″
Mounting depth9 5/8″

“≈” 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 American Bass 12″ models