Gladen SQL 12 Extreme (SVC 2 ohm)

12″ subwoofer · 2 Ω · 1,300 W RMS

Fs 33 HzQts 0.35Vas 1.27 ft³Xmax 0.59″

Recommended box

For a sedan, one sub, 1,300 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 volume0.72 ft³ (20.5 L)
Qtc0.59
Fc55 Hz
F3 (−3 dB, no cabin gain)71 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 10 1/4″
Open sealed box in designer

Ported

Net volume1.45 ft³ (41 L)
Tuning (Fb)33 Hz
Portround port Ø2 1/2″, 6 5/8″ long
Port velocity at 1,300 W454 ft/s
F3 (−3 dB, no cabin gain)32 Hz
Example box (outside)22 15/16″ × 15 3/4″ × 10 1/4″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs33 Hz
Qts0.35
Qes0.41
Qms2.52
Vas1.27 ft³
Re1.94 Ω
Sd76 in²
Xmax0.59″
Vd44.9 in³ calc.
Mms220 g calc.
BL14.7 T·m calc.
EBP80 — sealed or ported calc.
Sensitivity, 1 W / 1 m87 dB calc.

General

Size12″
Voice coils2 Ω
RMS power1,300 W

Mounting dimensions

Ø12 13/16″cutout Ø11 1/16″mounting depth 7 13/16″magnet Ø≈ 7 3/16″
Cutout diameter11 1/16″
Mounting depth7 13/16″
Overall diameter12 13/16″

“≈” 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