Clarion WG3020D

12″ subwoofer · dual 4 Ω · 300 W RMS

Fs 34 HzQts 0.63Vas 2.31 ft³Xmax 0.24″

Recommended box

For a sedan, one sub, 300 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 volume1.84 ft³ (52 L)
Qtc0.95
Fc51 Hz
F3 (−3 dB, no cabin gain)43 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 9 3/16″
Open sealed box in designer

Ported

Net volume3.14 ft³ (89 L)
Tuning (Fb)36 Hz
Portslot 1 3/4 × 14 5/16″, 12 1/2″ long
Port velocity at 300 W60 ft/s
F3 (−3 dB, no cabin gain)32 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 15 7/16″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs34 Hz
Qts0.63
Qes0.72
Qms5.04
Vas2.31 ft³
Re (one coil)3.75 Ω
Sd81.1 in²
Xmax0.24″
Vd19.1 in³ calc.
Mms130 g calc.
BL12 T·m calc.
EBP47 — suits sealed calc.
Sensitivity, 1 W / 1 m87.5 dB calc.

General

Size12″
Voice coilsdual 4 Ω
RMS power300 W

Mounting dimensions

Ø12″cutout Ø11″mounting depth 5 7/8″magnet Ø≈ 7 1/8″
Cutout diameter11″
Mounting depth5 7/8″
Overall diameter12″

“≈” 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 Clarion 12″ models