Gladen SQL 15 Extreme (SVC 2 ohm)

15″ subwoofer · 2 Ω · 1,400 W RMS

Fs 35 HzQts 0.51Vas 2.41 ft³Xmax 0.59″

Recommended box

For a sedan, one sub, 1,400 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 volume1.70 ft³ (48 L)
Qtc0.80
Fc54 Hz
F3 (−3 dB, no cabin gain)51 Hz
Example box (outside)17 5/16″ × 17 5/16″ × 14 3/16″
Open sealed box in designer

Ported

Net volume4.98 ft³ (141 L)
Tuning (Fb)31 Hz
Portslot 3 15/16 × 16 11/16″, 30″ long
Port velocity at 1,400 W64 ft/s
F3 (−3 dB, no cabin gain)28 Hz
Example box (outside)31 1/2″ × 18 1/8″ × 23 9/16″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs35 Hz
Qts0.51
Qes0.63
Qms2.79
Vas2.41 ft³
Re1.9 Ω
Sd128.7 in²
Xmax0.59″
Vd76 in³ calc.
Mms295 g calc.
BL14 T·m calc.
EBP56 — sealed or ported calc.
Sensitivity, 1 W / 1 m88.7 dB calc.

General

Size15″
Voice coils2 Ω
RMS power1,400 W

Mounting dimensions

Ø15 7/8″cutout Ø14″mounting depth 9 1/8″magnet Ø≈ 9 1/16″
Cutout diameter14″
Mounting depth9 1/8″
Overall diameter15 7/8″

“≈” 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