American Bass TM-1222

12″ subwoofer · dual 2 Ω · 600 W RMS

Fs 29.2 HzQts 0.44Vas 2.30 ft³Xmax 0.43″

Recommended box

For a sedan, one sub, 600 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 volume0.95 ft³ (27 L)
Qtc0.81
Fc54 Hz
F3 (−3 dB, no cabin gain)51 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 12 11/16″
Open sealed box in designer

Ported

Net volume3.18 ft³ (90 L)
Tuning (Fb)29 Hz
Portslot 2 3/8 × 14 5/16″, 29 1/16″ long
Port velocity at 600 W65 ft/s
F3 (−3 dB, no cabin gain)27 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 17 3/8″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs29.2 Hz
Qts0.44
Qes0.471
Qms5.83
Vas2.30 ft³
Re (one coil)1.8 Ω
Sd82.3 in²
Xmax0.43″
Vd35.6 in³ calc.
Mms182 g calc.
BL11.3 T·m calc.
EBP62 — sealed or ported calc.
Sensitivity, 1 W / 1 m87.4 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power600 W

Mounting dimensions

Ø12 7/16″cutout Ø11 1/8″mounting depth 4 7/16″magnet Ø≈ 7 3/16″
Cutout diameter11 1/8″
Mounting depth4 7/16″
Overall diameter12 7/16″

“≈” 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