Gladen Sigma SSWX12 Extreme (DVC 2 ohm)

12″ subwoofer · dual 2 Ω · 800 W RMS

Fs 32 HzQts 0.49Vas 1.00 ft³Xmax 0.59″

Recommended box

For a sedan, one sub, 800 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 volume0.74 ft³ (21 L)
Qtc0.76
Fc49 Hz
F3 (−3 dB, no cabin gain)48 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 10 7/16″
Open sealed box in designer

Ported

Net volume1.98 ft³ (56 L)
Tuning (Fb)28 Hz
Portslot 2 3/16 × 14 5/16″, 48 7/8″ long
Port velocity at 800 W66 ft/s
F3 (−3 dB, no cabin gain)25 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 14 1/4″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs32 Hz
Qts0.49
Qes0.53
Qms7.08
Vas1.00 ft³
Re (one coil)1.8 Ω
Sd82.3 in²
Xmax0.59″
Vd48.6 in³ calc.
Mms348 g calc.
BL15.4 T·m calc.
EBP60 — sealed or ported calc.
Sensitivity, 1 W / 1 m84.4 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power800 W

Mounting dimensions

Ø13″cutout Ø11 1/8″mounting depth 6 3/4″magnet Ø6 15/16″
Cutout diameter11 1/8″
Mounting depth6 3/4″
Overall diameter13″
Magnet diameter6 15/16″

“≈” 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 Gladen 12″ models