Gladen RS-X 08 (SVC 4 ohm)

8″ subwoofer · 4 Ω · 250 W RMS

Fs 43 HzQts 0.64Vas 0.32 ft³

Recommended box

For a sedan, one sub, 250 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 volume0.60 ft³ (17 L)
Qtc0.80
Fc53 Hz
F3 (−3 dB, no cabin gain)50 Hz
Example box (outside)10 1/4″ × 10 1/4″ × 15 9/16″
Open sealed box in designer

Ported

Net volume1.31 ft³ (37 L)
Tuning (Fb)30 Hz
Port2 round ports Ø2 1/2″, 20 13/16″ long
Port velocity at 250 W101 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 7 7/16″
Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs43 Hz
Qts0.64
Qes0.72
Qms6.09
Vas0.32 ft³
Re3.75 Ω
Sd33.5 in²
Xmax≈ 0.39″
Mms100 g calc.
BL11.9 T·m calc.
EBP60 — sealed or ported calc.
Sensitivity, 1 W / 1 m82 dB calc.

General

Size8″
Voice coils4 Ω
RMS power250 W

Mounting dimensions

Ø8 1/2″cutout Ø7 3/16″mounting depth 4 1/8″magnet Ø4 15/16″
Cutout diameter7 3/16″
Mounting depth4 1/8″
Overall diameter8 1/2″
Magnet diameter4 15/16″

“≈” 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 8″ models