Crescendo Audio Contralto 15 D1

15″ subwoofer · dual 1 Ω · 2,500 W RMS

Fs 28.4 HzQts 0.33Vas 3.02 ft³Xmax 1.02″

Recommended box

For a sedan, one sub, 2,500 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 volume1.39 ft³ (39.5 L)
Qtc0.58
Fc51 Hz
F3 (−3 dB, no cabin gain)67 Hz
Example box (outside)16 15/16″ × 16 15/16″ × 12 11/16″
Open sealed box in designer

Ported

Net volume2.37 ft³ (67 L)
Tuning (Fb)33 Hz
Portslot 3 3/8 × 16 5/16″, 50 1/2″ long
Port velocity at 2,500 W74 ft/s
F3 (−3 dB, no cabin gain)33 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 16 7/8″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs28.4 Hz
Qts0.33
Qes0.35
Qms4.83
Vas3.02 ft³
Re (one coil)≈ 0.85 Ω
Sd≈ 124 in²
Xmax1.02″
EBP81 — sealed or ported calc.
Sensitivity, 1 W / 1 m89.5 dB calc.

General

Size15″
Voice coilsdual 1 Ω
RMS power2,500 W

Mounting dimensions

Ø15 3/4″cutout Ø13 3/4″mounting depth 10 1/4″magnet Ø≈ 8 15/16″
Cutout diameter13 3/4″
Mounting depth10 1/4″
Overall diameter15 3/4″

“≈” 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