Gladen SQX 15 Extreme (SVC 2 ohm)

15″ subwoofer · 2 Ω · 850 W RMS

Fs 35.5 HzQts 0.53Vas 2.85 ft³

Recommended box

For a sedan, one sub, 850 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 volume2.15 ft³ (61 L)
Qtc0.80
Fc54 Hz
F3 (−3 dB, no cabin gain)51 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 9 5/8″
Open sealed box in designer

Ported

Net volume4.98 ft³ (141 L)
Tuning (Fb)33 Hz
Portslot 3 3/8 × 16 5/16″, 20 13/16″ long
Port velocity at 850 W64 ft/s
F3 (−3 dB, no cabin gain)29 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 22 1/4″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs35.5 Hz
Qts0.53
Qes0.57
Qms6.73
Vas2.85 ft³
Re1.99 Ω
Sd128.7 in²
Xmax≈ 0.39″
Mms243 g calc.
BL13.8 T·m calc.
EBP62 — sealed or ported calc.
Sensitivity, 1 W / 1 m90 dB calc.

General

Size15″
Voice coils2 Ω
RMS power850 W

Mounting dimensions

Ø15 7/16″cutout Ø13 15/16″mounting depth 7″magnet Ø≈ 9 1/16″
Cutout diameter13 15/16″
Mounting depth7″
Overall diameter15 7/16″

“≈” 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 15″ models