Skar Audio VD-12 D4

12″ subwoofer · dual 4 Ω · 500 W RMS

Fs 36.6 HzQts 0.60Vas 1.56 ft³Xmax 0.43″

Recommended box

For a sedan, one sub, 500 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 volume1.73 ft³ (49 L)
Qtc0.83
Fc51 Hz
F3 (−3 dB, no cabin gain)46 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 8 3/4″
Open sealed box in designer

Ported

Net volume2.93 ft³ (83 L)
Tuning (Fb)34 Hz
Portslot 2 3/16 × 14 5/16″, 19 7/8″ long
Port velocity at 500 W64 ft/s
F3 (−3 dB, no cabin gain)30 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 15 3/8″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs36.6 Hz
Qts0.60
Qes0.7
Qms4.2
Vas1.56 ft³
Re (one coil)≈ 3.4 Ω
Sd≈ 76 in²
Xmax0.43″
EBP52 — sealed or ported calc.
Sensitivity, 1 W / 1 m86.9 dB calc.

General

Size12″
Voice coilsdual 4 Ω
RMS power500 W

Mounting dimensions

Ø12 9/16″cutout Ø11 5/16″mounting depth 4 15/16″magnet Ø6″
Cutout diameter11 5/16″
Mounting depth4 15/16″
Overall diameter12 9/16″
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 12″ models