DD Audio 612f D4

12″ subwoofer · dual 4 Ω · 1,000 W RMS

Fs 31 HzQts 0.41Vas 2.87 ft³Xmax 0.87″

Recommended box

For a sedan, one sub, 1,000 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 volume0.99 ft³ (28 L)
Qtc0.80
Fc61 Hz
F3 (−3 dB, no cabin gain)58 Hz
Example box (outside)14 9/16″ × 14 9/16″ × 12 3/8″
Open sealed box in designer

Ported

Net volume2.93 ft³ (83 L)
Tuning (Fb)33 Hz
Portslot 3 1/8 × 14 5/16″, 32 1/4″ long
Port velocity at 1,000 W62 ft/s
F3 (−3 dB, no cabin gain)31 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 17 9/16″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs31 Hz
Qts0.41
Qes0.443
Qms5.06
Vas2.87 ft³
Re (one coil)≈ 3.4 Ω
Sd≈ 76 in²
Xmax0.87″
EBP70 — sealed or ported calc.
Sensitivity, 1 W / 1 m89.4 dB calc.

General

Size12″
Voice coilsdual 4 Ω
RMS power1,000 W

Mounting dimensions

Ø12 7/8″cutout Ø11 1/2″mounting depth 7 3/8″magnet Ø7″
Cutout diameter11 1/2″
Mounting depth7 3/8″
Overall diameter12 7/8″
Magnet diameter7″

“≈” 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