Cerwin-Vega Mobile ST124D (Stroker 12" DVC 4ohm)

12″ subwoofer · dual 4 Ω · 1,000 W RMS

Fs 30.2 HzQts 0.48Vas 1.38 ft³Xmax 0.65″

Recommended box

For a sedan, one sub, 1,000 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 volume0.78 ft³ (22 L)
Qtc0.80
Fc50 Hz
F3 (−3 dB, no cabin gain)48 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 10 13/16″
Open sealed box in designer

Ported

Net volume2.51 ft³ (71 L)
Tuning (Fb)28 Hz
Portslot 2 3/4 × 14 5/16″, 48 1/2″ long
Port velocity at 1,000 W62 ft/s
F3 (−3 dB, no cabin gain)25 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 17 1/4″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs30.2 Hz
Qts0.48
Qes0.56
Qms3.3
Vas1.38 ft³
Re (one coil)3.25 Ω
Sd76 in²
Xmax0.65″
Vd49 in³ calc.
Mms241 g calc.
BL16.3 T·m calc.
EBP54 — sealed or ported calc.
Sensitivity, 1 W / 1 m84.9 dB calc.

General

Size12″
Voice coilsdual 4 Ω
RMS power1,000 W

Mounting dimensions

Ø12 3/8″cutout Ø11 1/8″mounting depth 8 1/8″magnet Ø≈ 7 1/4″
Cutout diameter11 1/8″
Mounting depth8 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 Cerwin-Vega Mobile 12″ models