Cerwin-Vega Mobile SPRO122D (Stroker Pro 12" DVC 2ohm)

12″ subwoofer · dual 2 Ω · 2,000 W RMS

Fs 25 HzQts 0.26Vas 1.47 ft³Xmax 1.30″

Recommended box

For a sedan, one sub, 2,000 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 volume0.97 ft³ (27.5 L)
Qtc0.41
Fc40 Hz
F3 (−3 dB, no cabin gain)84 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 12 7/8″
Open sealed box in designer

Ported

Net volume1.45 ft³ (41 L)
Tuning (Fb)26 Hz
Portround port Ø2 1/2″, 11 3/4″ long
Port velocity at 2,000 W519 ft/s
F3 (−3 dB, no cabin gain)63 Hz
Example box (outside)18 1/2″ × 15 3/4″ × 12 13/16″
Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs25 Hz
Qts0.26
Qes0.29
Qms2.2
Vas1.47 ft³
Re (one coil)1.43 Ω
Sd76 in²
Xmax1.30″
Vd98.7 in³ calc.
Mms331 g calc.
BL16 T·m calc.
EBP86 — sealed or ported calc.
Sensitivity, 1 W / 1 m85.5 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power2,000 W

Mounting dimensions

Ø12 3/8″cutout Ø11 1/8″mounting depth 10 5/16″magnet Ø≈ 7 1/4″
Cutout diameter11 1/8″
Mounting depth10 5/16″
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