Gladen SQX 10 (SVC 4 ohm)

10″ subwoofer · 4 Ω · 350 W RMS

Fs 38.8 HzQts 0.39Vas 0.87 ft³Xmax 0.39″
The published specs don’t add up:

Recommended box

For a sedan, one sub, 350 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 volume0.53 ft³ (15 L)
Qtc0.63
Fc63 Hz
F3 (−3 dB, no cabin gain)75 Hz
Example box (outside)12 5/8″ × 12 5/8″ × 9 5/8″
Open sealed box in designer

Ported

Net volume1.09 ft³ (31 L)
Tuning (Fb)38 Hz
Port2 round ports Ø3″, 21 9/16″ long
Port velocity at 350 W81 ft/s
F3 (−3 dB, no cabin gain)36 Hz
Example box (outside)26 7/16″ × 15 3/4″ × 8 1/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs38.8 Hz
Qts0.39
Qes0.42
Qms4.99
Vas0.87 ft³
Re3.2 Ω
Sd56.7 in²
Xmax0.39″
Vd22.3 in³ calc.
Mms130 g calc.
BL15.6 T·m calc.
EBP92 — sealed or ported calc.
Sensitivity, 1 W / 1 m87.3 dB calc.

General

Size10″
Voice coils4 Ω
RMS power350 W

Mounting dimensions

Ø10 3/8″cutout Ø9 3/8″mounting depth 5 1/2″magnet Ø≈ 6 1/16″
Cutout diameter9 3/8″
Mounting depth5 1/2″
Overall diameter10 3/8″

“≈” 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 10″ models