Gladen Sigma SSW08 (DVC 2 ohm)

8″ subwoofer · dual 2 Ω · 350 W RMS

Fs 57 HzQts 0.50Vas 0.14 ft³Xmax 0.33″

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 volume0.28 ft³ (8 L)
Qtc0.61
Fc70 Hz
F3 (−3 dB, no cabin gain)84 Hz
Example box (outside)10 1/4″ × 10 1/4″ × 8 1/2″
Open sealed box in designer

Ported

Net volume0.60 ft³ (17 L)
Tuning (Fb)41 Hz
Portround port Ø2 1/2″, 11 3/8″ long
Port velocity at 350 W193 ft/s
F3 (−3 dB, no cabin gain)37 Hz
Example box (outside)15 1/4″ × 15 3/4″ × 7 5/16″
Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs57 Hz
Qts0.50
Qes0.54
Qms7
Vas0.14 ft³
Re (one coil)1.8 Ω
Sd31.2 in²
Xmax0.33″
Vd10.4 in³ calc.
Mms112 g calc.
BL11.6 T·m calc.
EBP106 — suits ported calc.
Sensitivity, 1 W / 1 m83.4 dB calc.

General

Size8″
Voice coilsdual 2 Ω
RMS power350 W

Mounting dimensions

Ø8 7/16″cutout Ø7 3/16″mounting depth 4 3/4″magnet Ø5 1/4″
Cutout diameter7 3/16″
Mounting depth4 3/4″
Overall diameter8 7/16″
Magnet diameter5 1/4″

“≈” 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 8″ models