Skar Audio SVR-12 D4

12″ subwoofer · dual 4 Ω · 800 W RMS

Fs 34 HzQts 0.55Vas 1.03 ft³Xmax 0.59″
The published specs don’t add up:

Recommended box

For a sedan, one sub, 800 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 volume0.92 ft³ (26 L)
Qtc0.80
Fc49 Hz
F3 (−3 dB, no cabin gain)47 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 12 5/16″
Open sealed box in designer

Ported

Net volume2.75 ft³ (78 L)
Tuning (Fb)27 Hz
Portslot 2 9/16 × 14 5/16″, 43 13/16″ long
Port velocity at 800 W65 ft/s
F3 (−3 dB, no cabin gain)24 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 17 7/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs34 Hz
Qts0.55
Qes0.6
Qms6.53
Vas1.03 ft³
Re (one coil)≈ 3.4 Ω
Sd82.3 in²
Xmax0.59″
Vd48.6 in³ calc.
Mms301 g calc.
BL19.1 T·m calc.
EBP57 — sealed or ported calc.
Sensitivity, 1 W / 1 m84.8 dB calc.

General

Size12″
Voice coilsdual 4 Ω
RMS power800 W

Mounting dimensions

Ø12 11/16″cutout Ø11 3/16″mounting depth 6 11/16″magnet Ø6 11/16″
Cutout diameter11 3/16″
Mounting depth6 11/16″
Overall diameter12 11/16″
Magnet diameter6 11/16″

“≈” 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 Skar Audio 12″ models