Cerwin-Vega Mobile VMAX122 (VMAX 12" DVC 2ohm)

12″ subwoofer · dual 2 Ω · 500 W RMS

32.7 HzFs, resonance
0.49Qts
1.52 ft³Vas
0.54″Xmax
500 WRMS

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

smaller, tighter
0.92 ft³ (26 L)
Net volume
Qtc0.80
Fc53 Hz
F3 (−3 dB, no cabin gain)50 Hz
Example box (outside)14 9/16″ × 14 9/16″ × 11 5/8″
Open sealed box in designer

Ported

deeper, louder
3.00 ft³ (85 L)
Net volume
Tuning (Fb)29 Hz
Portslot 2 3/16 × 14 5/16″, 28 1/4″ long
Port velocity at 500 W64 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 16 7/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs32.7 Hz
Qts0.49
Qes0.554
Qms4.46
Vas1.52 ft³
Re (one coil)1.85 Ω
Sd85.6 in²
Xmax0.54″
Vd46.5 in³ calc.
Mms237 g calc.
BL12.8 T·m calc.
EBP59 — sealed or ported calc.
Sensitivity, 1 W / 1 m86.3 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power500 W

Mounting dimensions

Ø12 5/8″cutout Ø11 1/4″mounting depth 6 3/4″magnet Ø≈ 7 5/16″
Cutout diameter11 1/4″
Mounting depth6 3/4″
Overall diameter12 5/8″

“≈” 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