Cerwin-Vega Mobile HS122D (HED Shallow 12" DVC 2ohm)

12″ subwoofer · dual 2 Ω · 250 W RMS

Fs 30 HzQts 0.88Vas 1.80 ft³Xmax 0.35″

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)
Qtc1.23
Fc42 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)32 Hz
Portslot 1 9/16 × 14 5/16″, 14 5/8″ long
Port velocity at 250 W56 ft/s
F3 (−3 dB, no cabin gain)26 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

Fs30 Hz
Qts0.88
Qes1.05
Qms5.5
Vas1.80 ft³
Re (one coil)1.5 Ω
Sd82.2 in²
Xmax0.35″
Vd28.8 in³ calc.
Mms220 g calc.
BL7.7 T·m calc.
EBP29 — suits sealed calc.
Sensitivity, 1 W / 1 m83.2 dB calc.

General

Size12″
Voice coilsdual 2 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