DD Audio 715d D2

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

Fs 31.6 HzQts 0.54Vas 2.48 ft³Xmax 0.63″

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 volume2.05 ft³ (58 L)
Qtc0.80
Fc47 Hz
F3 (−3 dB, no cabin gain)44 Hz
Example box (outside)16 15/16″ × 16 15/16″ × 17 3/8″
Open sealed box in designer

Ported

Net volume4.80 ft³ (136 L)
Tuning (Fb)29 Hz
Portslot 3 3/4 × 16 5/16″, 33 7/8″ long
Port velocity at 1,200 W63 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 23 3/4″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs31.6 Hz
Qts0.54
Qes0.596
Qms5.49
Vas2.48 ft³
Re (one coil)≈ 1.7 Ω
Sd≈ 124 in²
Xmax0.63″
EBP53 — sealed or ported calc.
Sensitivity, 1 W / 1 m87.7 dB calc.

General

Size15″
Voice coilsdual 2 Ω
RMS power1,200 W

Mounting dimensions

Ø15 3/8″cutout Ø13 7/8″mounting depth 9 1/8″magnet Ø≈ 9″
Cutout diameter13 7/8″
Mounting depth9 1/8″
Overall diameter15 3/8″

“≈” 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 15″ models