Sundown Audio Uv2-15 D4

15″ subwoofer · dual 4 Ω · 2,000 W RMS

Fs 36.4 HzQts 0.55Vas 1.63 ft³Xmax 1.18″

Recommended box

For a sedan, one sub, 2,000 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 volume1.45 ft³ (41 L)
Qtc0.80
Fc53 Hz
F3 (−3 dB, no cabin gain)50 Hz
Example box (outside)17 5/16″ × 17 5/16″ × 12 1/2″
Open sealed box in designer

Ported

Net volume4.38 ft³ (124 L)
Tuning (Fb)29 Hz
Portslot 4 3/4 × 16 11/16″, 49 15/16″ long
Port velocity at 2,000 W63 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)31 1/2″ × 18 1/8″ × 25 3/4″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs36.4 Hz
Qts0.55
Qes0.61
Qms5.59
Vas1.63 ft³
Re (one coil)3.03 Ω
Sd132.9 in²
Xmax1.18″
Vd157 in³ calc.
Mms432 g calc.
BL22.2 T·m calc.
EBP60 — sealed or ported calc.
Sensitivity, 1 W / 1 m87.6 dB calc.

General

Size15″
Voice coilsdual 4 Ω
RMS power2,000 W

Mounting dimensions

Ø15 9/16″cutout Ø14 1/8″mounting depth 9″magnet Ø9 11/16″
Cutout diameter14 1/8″
Mounting depth9″
Overall diameter15 9/16″
Magnet diameter9 11/16″

The spec sheet's Sd of 177 in² is the area of a 15″ circle, not the cone's radiating area — not used.

Cone area (Sd) calculated from Fs, Vas and Mms: 132.9 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