DD Audio 712d D2

12″ subwoofer · dual 2 Ω · 1,200 W RMS

Fs 28.3 HzQts 0.43Vas 1.40 ft³Xmax 0.55″

Recommended box

For a sedan, one sub, 1,200 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 volume0.85 ft³ (24 L)
Qtc0.71
Fc46 Hz
F3 (−3 dB, no cabin gain)49 Hz
Example box (outside)14 9/16″ × 14 9/16″ × 10 15/16″
Open sealed box in designer

Ported

Net volume1.91 ft³ (54 L)
Tuning (Fb)28 Hz
Portslot 1 15/16 × 14 5/16″, 46 1/16″ long
Port velocity at 1,200 W83 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 13 3/8″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs28.3 Hz
Qts0.43
Qes0.482
Qms4.34
Vas1.40 ft³
Re (one coil)≈ 1.7 Ω
Sd≈ 76 in²
Xmax0.55″
EBP59 — sealed or ported calc.
Sensitivity, 1 W / 1 m84.7 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power1,200 W

Mounting dimensions

Ø12 5/8″cutout Ø11 3/8″mounting depth 8 9/16″magnet Ø≈ 7 3/8″
Cutout diameter11 3/8″
Mounting depth8 9/16″
Overall diameter12 5/8″

“≈” 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 DD Audio 12″ models