Skar Audio SVR-8 D4

8″ subwoofer · dual 4 Ω · 400 W RMS

Fs 48 HzQts 0.56Vas 0.19 ft³Xmax 0.53″

Recommended box

For a sedan, one sub, 400 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)
Qtc0.72
Fc62 Hz
F3 (−3 dB, no cabin gain)63 Hz
Example box (outside)10 5/8″ × 10 5/8″ × 7 7/8″
Open sealed box in designer

Ported

Net volume0.60 ft³ (17 L)
Tuning (Fb)43 Hz
Portround port Ø2 1/2″, 10 3/16″ long
Port velocity at 400 W203 ft/s
F3 (−3 dB, no cabin gain)37 Hz
Example box (outside)14 11/16″ × 15 3/4″ × 7 1/2″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs48 Hz
Qts0.56
Qes0.64
Qms4.4
Vas0.19 ft³
Re (one coil)≈ 3.4 Ω
Sd31.2 in²
Xmax0.53″
Vd16.6 in³ calc.
Mms119 g calc.
BL13.8 T·m calc.
EBP75 — sealed or ported calc.
Sensitivity, 1 W / 1 m81.6 dB calc.

General

Size8″
Voice coilsdual 4 Ω
RMS power400 W

Mounting dimensions

Ø8 1/2″cutout Ø7 5/16″mounting depth 4 15/16″magnet Ø6″
Cutout diameter7 5/16″
Mounting depth4 15/16″
Overall diameter8 1/2″
Magnet diameter6″

“≈” 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 Skar Audio 8″ models