DD Audio 612d D2

12″ subwoofer · dual 2 Ω · 600 W RMS

Fs 33.7 HzQts 0.61Vas 1.56 ft³Xmax 0.51″

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 volume1.73 ft³ (49 L)
Qtc0.84
Fc46 Hz
F3 (−3 dB, no cabin gain)42 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)32 Hz
Portslot 2 3/8 × 14 5/16″, 25 5/16″ long
Port velocity at 600 W62 ft/s
F3 (−3 dB, no cabin gain)28 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 16 1/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs33.7 Hz
Qts0.61
Qes0.686
Qms5.52
Vas1.56 ft³
Re (one coil)≈ 1.7 Ω
Sd≈ 76 in²
Xmax0.51″
EBP49 — suits sealed calc.
Sensitivity, 1 W / 1 m85.9 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power600 W

Mounting dimensions

Ø12 1/4″cutout Ø11 1/8″mounting depth 6 1/16″magnet Ø≈ 7 1/4″
Cutout diameter11 1/8″
Mounting depth6 1/16″
Overall diameter12 1/4″

“≈” 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