American Bass SL-124

12″ subwoofer · 4 Ω · 300 W RMS

Fs 36.2 HzQts 0.45Vas 2.38 ft³Xmax 0.35″

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 volume1.09 ft³ (31 L)
Qtc0.80
Fc64 Hz
F3 (−3 dB, no cabin gain)61 Hz
Example box (outside)13 3/4″ × 13 3/4″ × 15″
Open sealed box in designer

Ported

Net volume3.18 ft³ (90 L)
Tuning (Fb)36 Hz
Portslot 1 15/16 × 14 5/16″, 13 15/16″ long
Port velocity at 300 W60 ft/s
F3 (−3 dB, no cabin gain)33 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 15 3/4″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs36.2 Hz
Qts0.45
Qes0.487
Qms6.06
Vas2.38 ft³
Re3.4 Ω
Sd82.3 in²
Xmax0.35″
Vd29.2 in³ calc.
Mms115 g calc.
BL13.5 T·m calc.
EBP74 — sealed or ported calc.
Sensitivity, 1 W / 1 m90.2 dB calc.

General

Size12″
Voice coils4 Ω
RMS power300 W

Mounting dimensions

Ø12 3/8″cutout Ø10 11/16″mounting depth 4 1/8″magnet Ø≈ 6 15/16″
Cutout diameter10 11/16″
Mounting depth4 1/8″
Overall diameter12 3/8″

“≈” 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