Gladen SQL 15 (SVC 4 ohm)

15″ subwoofer · 4 Ω · 1,200 W RMS

Fs 35.5 HzQts 0.51Vas 2.85 ft³Xmax 0.59″

Recommended box

For a sedan, one sub, 1,200 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 volume1.98 ft³ (56 L)
Qtc0.80
Fc55 Hz
F3 (−3 dB, no cabin gain)52 Hz
Example box (outside)17 5/16″ × 17 5/16″ × 16 1/8″
Open sealed box in designer

Ported

Net volume4.98 ft³ (141 L)
Tuning (Fb)33 Hz
Portslot 3 3/4 × 16 11/16″, 24 1/4″ long
Port velocity at 1,200 W65 ft/s
F3 (−3 dB, no cabin gain)30 Hz
Example box (outside)31 1/2″ × 18 1/8″ × 22 9/16″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs35.5 Hz
Qts0.51
Qes0.6
Qms3.52
Vas2.85 ft³
Re2.8 Ω
Sd128.7 in²
Xmax0.59″
Vd76 in³ calc.
Mms243 g calc.
BL15.9 T·m calc.
EBP59 — sealed or ported calc.
Sensitivity, 1 W / 1 m89.8 dB calc.

General

Size15″
Voice coils4 Ω
RMS power1,200 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