Skar Audio SDR-12 D2

12″ subwoofer · dual 2 Ω · 600 W RMS

Fs 32 HzQts 0.53Vas 1.28 ft³Xmax 0.53″

Recommended box

For a sedan, one sub, 600 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 volume1.02 ft³ (29 L)
Qtc0.80
Fc48 Hz
F3 (−3 dB, no cabin gain)45 Hz
Example box (outside)14 9/16″ × 14 9/16″ × 12 11/16″
Open sealed box in designer

Ported

Net volume2.83 ft³ (80 L)
Tuning (Fb)28 Hz
Portslot 2 3/8 × 14 5/16″, 36 1/16″ long
Port velocity at 600 W63 ft/s
F3 (−3 dB, no cabin gain)25 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 16 11/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs32 Hz
Qts0.53
Qes0.58
Qms6.76
Vas1.28 ft³
Re (one coil)≈ 1.7 Ω
Sd73.1 in²
Xmax0.53″
Vd38.8 in³ calc.
Mms215 g calc.
BL11.3 T·m calc.
EBP55 — sealed or ported calc.
Sensitivity, 1 W / 1 m85.1 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power600 W

Mounting dimensions

Ø12 1/8″cutout Ø11 1/4″mounting depth 6 1/2″magnet Ø6 1/8″
Cutout diameter11 1/4″
Mounting depth6 1/2″
Overall diameter12 1/8″
Magnet diameter6 1/8″

“≈” 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