Gladen RS 08 (SVC 4 ohm)

8″ subwoofer · 4 Ω · 175 W RMS

Fs 39.6 HzQts 0.50Vas 0.64 ft³

Recommended box

For a sedan, one sub, 175 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 volume0.42 ft³ (12 L)
Qtc0.80
Fc63 Hz
F3 (−3 dB, no cabin gain)59 Hz
Example box (outside)10 1/4″ × 10 1/4″ × 11 5/8″
Open sealed box in designer

Ported

Net volume1.34 ft³ (38 L)
Tuning (Fb)34 Hz
Portslot 1 9/16 × 14 5/16″, 34 15/16″ long
Port velocity at 175 W38 ft/s
F3 (−3 dB, no cabin gain)31 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 9 1/2″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs39.6 Hz
Qts0.50
Qes0.55
Qms5.96
Vas0.64 ft³
Re3.5 Ω
Sd34.3 in²
Xmax≈ 0.39″
Mms62 g calc.
BL9.9 T·m calc.
EBP72 — sealed or ported calc.
Sensitivity, 1 W / 1 m85.1 dB calc.

General

Size8″
Voice coils4 Ω
RMS power175 W

Mounting dimensions

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