Sundown Audio Xv3-15 D2

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

Fs 31.4 HzQts 0.47Vas 1.62 ft³Xmax 1.18″

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 volume1.48 ft³ (42 L)
Qtc0.68
Fc45 Hz
F3 (−3 dB, no cabin gain)50 Hz
Example box (outside)16 15/16″ × 16 15/16″ × 13 5/16″
Open sealed box in designer

Ported

Net volume2.75 ft³ (78 L)
Tuning (Fb)29 Hz
Portslot 3 1/8 × 16 5/16″, 53 5/16″ long
Port velocity at 2,500 W79 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 18 5/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs31.4 Hz
Qts0.47
Qes0.561
Qms2.8
Vas1.62 ft³
Re (one coil)1.6 Ω
Sd113.4 in²
Xmax1.18″
Vd133.9 in³ calc.
Mms424 g calc.
BL15.4 T·m calc.
EBP56 — sealed or ported calc.
Sensitivity, 1 W / 1 m86.1 dB calc.

General

Size15″
Voice coilsdual 2 Ω
RMS power2,500 W

Mounting dimensions

Ø15 1/2″cutout Ø13 15/16″mounting depth 10 7/8″magnet Ø9 11/16″
Cutout diameter13 15/16″
Mounting depth10 7/8″
Overall diameter15 1/2″
Magnet diameter9 11/16″

Cone area (Sd) calculated from Fs, Vas and Mms: 113.4 in².

“≈” 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 Sundown Audio 15″ models