Audioque SDC2.515 D4

15″ subwoofer · dual 4 Ω · 600 W RMS

Fs 30 HzQts 0.67Vas 3.13 ft³

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)
Qtc0.97
Fc44 Hz
F3 (−3 dB, no cabin gain)36 Hz
Example box (outside)31 1/2″ × 18 1/8″ × 11 3/4″
Open sealed box in designer

Ported

Net volume4.80 ft³ (136 L)
Tuning (Fb)31 Hz
Portslot 2 3/8 × 16 11/16″, 17 5/8″ long
Port velocity at 600 W62 ft/s
F3 (−3 dB, no cabin gain)27 Hz
Example box (outside)31 1/2″ × 18 1/8″ × 20 1/4″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs30 Hz
Qts0.67
Qes0.799
Qms4.1
Vas3.13 ft³
Re (one coil)≈ 3.4 Ω
Sd≈ 124 in²
Xmax≈ 0.39″
EBP38 — suits sealed calc.
Sensitivity, 1 W / 1 m86.8 dB calc.

General

Size15″
Voice coilsdual 4 Ω
RMS power600 W

Mounting dimensions

Ø≈ 15 3/16″cutout ≈ Ø14″mounting depth 7 1/2″magnet Ø≈ 9 1/16″
Cutout diameter≈ 14″
Mounting depth7 1/2″

“≈” 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 Audioque 15″ models