DD Audio 715f D4

15″ subwoofer · dual 4 Ω · 1,500 W RMS

Fs 30.3 HzQts 0.63Vas 2.21 ft³Xmax 0.87″

Recommended box

For a sedan, one sub, 1,500 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 volume2.83 ft³ (80 L)
Qtc0.84
Fc40 Hz
F3 (−3 dB, no cabin gain)37 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 12″
Open sealed box in designer

Ported

Net volume4.80 ft³ (136 L)
Tuning (Fb)27 Hz
Portslot 3 15/16 × 16 5/16″, 42 3/8″ long
Port velocity at 1,500 W63 ft/s
F3 (−3 dB, no cabin gain)24 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 25 5/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs30.3 Hz
Qts0.63
Qes0.685
Qms7.35
Vas2.21 ft³
Re (one coil)≈ 3.4 Ω
Sd≈ 124 in²
Xmax0.87″
EBP44 — suits sealed calc.
Sensitivity, 1 W / 1 m86 dB calc.

General

Size15″
Voice coilsdual 4 Ω
RMS power1,500 W

Mounting dimensions

Ø15 3/8″cutout Ø13 7/8″mounting depth 9 3/8″magnet Ø7 9/16″
Cutout diameter13 7/8″
Mounting depth9 3/8″
Overall diameter15 3/8″
Magnet diameter7 9/16″

“≈” 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