DC Audio Shortie 12 D4

12″ subwoofer · dual 4 Ω · 500 W RMS

Fs 41.9 HzQts 0.64Vas 0.65 ft³Xmax 0.55″

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 volume1.13 ft³ (32 L)
Qtc0.80
Fc53 Hz
F3 (−3 dB, no cabin gain)49 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 14 9/16″
Open sealed box in designer

Ported

Net volume2.68 ft³ (76 L)
Tuning (Fb)29 Hz
Portslot 2 3/16 × 14 5/16″, 32 1/8″ long
Port velocity at 500 W64 ft/s
F3 (−3 dB, no cabin gain)25 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 15 9/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs41.9 Hz
Qts0.64
Qes0.728
Qms5.13
Vas0.65 ft³
Re (one coil)≈ 3.4 Ω
Sd85.6 in²
Xmax0.55″
Vd47.2 in³ calc.
Mms337 g calc.
BL20.4 T·m calc.
EBP58 — sealed or ported calc.
Sensitivity, 1 W / 1 m84.7 dB calc.

General

Size12″
Voice coilsdual 4 Ω
RMS power500 W

Mounting dimensions

Ø12 1/2″cutout Ø11″mounting depth 5 1/2″magnet Ø≈ 7 1/8″
Cutout diameter11″
Mounting depth5 1/2″
Overall diameter12 1/2″

“≈” 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 DC Audio 12″ models