American Bass TM-1244

12″ subwoofer · dual 4 Ω · 600 W RMS

30.7 HzFs, resonance
0.44Qts
2.37 ft³Vas
0.47″Xmax
600 WRMS

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

smaller, tighter
1.02 ft³ (29 L)
Net volume
Qtc0.80
Fc56 Hz
F3 (−3 dB, no cabin gain)53 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 13 7/16″
Open sealed box in designer

Ported

deeper, louder
3.18 ft³ (90 L)
Net volume
Tuning (Fb)31 Hz
Portslot 2 3/8 × 14 5/16″, 24 13/16″ long
Port velocity at 600 W65 ft/s
F3 (−3 dB, no cabin gain)29 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 17″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs30.7 Hz
Qts0.44
Qes0.485
Qms4.78
Vas2.37 ft³
Re (one coil)3.4 Ω
Sd82.3 in²
Xmax0.47″
Vd38.9 in³ calc.
Mms159 g calc.
BL14.7 T·m calc.
EBP63 — sealed or ported calc.
Sensitivity, 1 W / 1 m88.1 dB calc.

General

Size12″
Voice coilsdual 4 Ω
RMS power600 W

Mounting dimensions

Ø12 7/16″cutout Ø11″mounting depth 4 7/16″magnet Ø≈ 7 3/16″
Cutout diameter11″
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