DD Audio 615d D2

15″ subwoofer · dual 2 Ω · 600 W RMS

Fs 26.9 HzQts 0.68Vas 4.04 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 volume2.83 ft³ (80 L)
Qtc1.06
Fc42 Hz
F3 (−3 dB, no cabin gain)34 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)31 Hz
Portslot 2 3/16 × 16 5/16″, 15 9/16″ long
Port velocity at 600 W65 ft/s
F3 (−3 dB, no cabin gain)27 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 20 3/8″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs26.9 Hz
Qts0.68
Qes0.82
Qms3.97
Vas4.04 ft³
Re (one coil)≈ 1.7 Ω
Sd≈ 124 in²
Xmax0.51″
EBP33 — suits sealed calc.
Sensitivity, 1 W / 1 m86.4 dB calc.

General

Size15″
Voice coilsdual 2 Ω
RMS power600 W

Mounting dimensions

Ø15 1/4″cutout Ø13 7/8″mounting depth 7 1/8″magnet Ø≈ 9″
Cutout diameter13 7/8″
Mounting depth7 1/8″
Overall diameter15 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 15″ models