American Bass DX-124v2

12″ subwoofer · 4 Ω · 300 W RMS

Fs 31.5 HzQts 0.54Vas 1.75 ft³Xmax 0.47″

Recommended box

For a sedan, one sub, 300 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 volume1.48 ft³ (42 L)
Qtc0.80
Fc47 Hz
F3 (−3 dB, no cabin gain)44 Hz
Example box (outside)14 9/16″ × 14 9/16″ × 17 5/16″
Open sealed box in designer

Ported

Net volume3.07 ft³ (87 L)
Tuning (Fb)30 Hz
Portslot 1 3/4 × 14 5/16″, 20 3/8″ long
Port velocity at 300 W61 ft/s
F3 (−3 dB, no cabin gain)27 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 15 3/4″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs31.5 Hz
Qts0.54
Qes0.59
Qms6.43
Vas1.75 ft³
Re3.2 Ω
Sd79.1 in²
Xmax0.47″
Vd37.3 in³ calc.
Mms190 g calc.
BL14.3 T·m calc.
EBP53 — sealed or ported calc.
Sensitivity, 1 W / 1 m86.2 dB calc.

General

Size12″
Voice coils4 Ω
RMS power300 W

Mounting dimensions

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

“≈” 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