Gladen SQX 12 Extreme (SVC 2 ohm)

12″ subwoofer · 2 Ω · 750 W RMS

Fs 30 HzQts 0.32Vas 1.70 ft³Xmax 0.55″

Recommended box

For a sedan, one sub, 750 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 volume0.71 ft³ (20 L)
Qtc0.59
Fc55 Hz
F3 (−3 dB, no cabin gain)72 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 10 1/16″
Open sealed box in designer

Ported

Net volume1.45 ft³ (41 L)
Tuning (Fb)33 Hz
Portslot 1 15/16 × 14 5/16″, 43 7/16″ long
Port velocity at 750 W62 ft/s
F3 (−3 dB, no cabin gain)33 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 11 5/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs30 Hz
Qts0.32
Qes0.34
Qms5.52
Vas1.70 ft³
Re1.9 Ω
Sd76 in²
Xmax0.55″
Vd41.9 in³ calc.
Mms199 g calc.
BL14.5 T·m calc.
EBP88 — sealed or ported calc.
Sensitivity, 1 W / 1 m87.8 dB calc.

General

Size12″
Voice coils2 Ω
RMS power750 W

Mounting dimensions

Ø12 1/2″cutout Ø11 3/16″mounting depth 5 13/16″magnet Ø≈ 7 1/4″
Cutout diameter11 3/16″
Mounting depth5 13/16″
Overall diameter12 1/2″

“≈” 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