American Bass XD-1244v2

12″ subwoofer · dual 4 Ω · 500 W RMS

Fs 32.9 HzQts 0.77Vas 1.38 ft³Xmax 0.51″

Recommended box

For a sedan, one sub, 500 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 volume1.80 ft³ (51 L)
Qtc1.02
Fc44 Hz
F3 (−3 dB, no cabin gain)35 Hz
Example box (outside)14 9/16″ × 14 9/16″ × 20 1/2″
Open sealed box in designer

Ported

Net volume3.07 ft³ (87 L)
Tuning (Fb)31 Hz
Portslot 2 3/16 × 14 5/16″, 23 1/2″ long
Port velocity at 500 W62 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 16 1/4″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs32.9 Hz
Qts0.77
Qes0.88
Qms5.98
Vas1.38 ft³
Re (one coil)3.2 Ω
Sd79.1 in²
Xmax0.51″
Vd40.5 in³ calc.
Mms220 g calc.
BL12.9 T·m calc.
EBP37 — suits sealed calc.
Sensitivity, 1 W / 1 m84 dB calc.

General

Size12″
Voice coilsdual 4 Ω
RMS power500 W

Mounting dimensions

Ø≈ 12 11/16″cutout Ø11 9/16″mounting depth 6 13/16″magnet Ø≈ 7 1/2″
Cutout diameter11 9/16″
Mounting depth6 13/16″

“≈” 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