Clarion SW3011

12″ subwoofer · 4 Ω · 250 W RMS

Fs 29 HzQts 0.54Vas 1.78 ft³

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 volume1.48 ft³ (42 L)
Qtc0.80
Fc43 Hz
F3 (−3 dB, no cabin gain)40 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 18 5/16″
Open sealed box in designer

Ported

Net volume2.93 ft³ (83 L)
Tuning (Fb)28 Hz
Portslot 1 9/16 × 14 5/16″, 22 5/16″ long
Port velocity at 250 W59 ft/s
F3 (−3 dB, no cabin gain)25 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 15 3/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs29 Hz
Qts0.54
Qes0.593
Qms6
Vas1.78 ft³
Re≈ 3.4 Ω
Sd≈ 76 in²
Xmax≈ 0.39″
EBP49 — suits sealed calc.
Sensitivity, 1 W / 1 m85.2 dB calc.

General

Size12″
Voice coils4 Ω
RMS power250 W

Mounting dimensions

Ø12 3/8″cutout ≈ Ø11 3/16″mounting depth ≈ 5 7/8″magnet Ø≈ 7 1/4″
Cutout diameter≈ 11 3/16″
Mounting depth≈ 5 7/8″
Overall diameter12 3/8″

Only Qts is published — Qms assumed to be 6 and Qes calculated (barely affects box design).

“≈” 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