Cerwin-Vega Mobile HS124D (HED Shallow 12" DVC 4ohm)

12″ subwoofer · dual 4 Ω · 250 W RMS

Fs 31 HzQts 0.92Vas 1.80 ft³Xmax 0.33″

Recommended box

For a sedan, one sub, 250 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 volume1.87 ft³ (53 L)
Qtc1.29
Fc43 Hz
F3 (−3 dB, no cabin gain)32 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 9 3/8″
Open sealed box in designer

Ported

Net volume3.18 ft³ (90 L)
Tuning (Fb)33 Hz
Portslot 1 9/16 × 14 5/16″, 13 1/2″ long
Port velocity at 250 W56 ft/s
F3 (−3 dB, no cabin gain)27 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 15 9/16″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs31 Hz
Qts0.92
Qes1.13
Qms5
Vas1.80 ft³
Re (one coil)3 Ω
Sd82.2 in²
Xmax0.33″
Vd26.8 in³ calc.
Mms206 g calc.
BL10.3 T·m calc.
EBP27 — suits sealed calc.
Sensitivity, 1 W / 1 m83.3 dB calc.

General

Size12″
Voice coilsdual 4 Ω
RMS power250 W

Mounting dimensions

Ø12 9/16″cutout Ø11 1/8″mounting depth 3 13/16″magnet Ø≈ 7 1/4″
Cutout diameter11 1/8″
Mounting depth3 13/16″
Overall diameter12 9/16″

“≈” 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 Cerwin-Vega Mobile 12″ models