Sundown Audio Uv2-12 D2

12″ subwoofer · dual 2 Ω · 2,000 W RMS

Fs 41.3 HzQts 0.44Vas 0.52 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 volume0.79 ft³ (22.5 L)
Qtc0.56
Fc53 Hz
F3 (−3 dB, no cabin gain)72 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 11″
Open sealed box in designer

Ported

Net volume1.48 ft³ (42 L)
Tuning (Fb)31 Hz
Portround port Ø2 1/2″, 7 1/2″ long
Port velocity at 2,000 W611 ft/s
F3 (−3 dB, no cabin gain)29 Hz
Example box (outside)22 1/16″ × 15 3/4″ × 10 13/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs41.3 Hz
Qts0.44
Qes0.48
Qms4.74
Vas0.52 ft³
Re (one coil)1.92 Ω
Sd77.7 in²
Xmax1.18″
Vd91.8 in³ calc.
Mms359 g calc.
BL19.3 T·m calc.
EBP86 — sealed or ported calc.
Sensitivity, 1 W / 1 m85.4 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power2,000 W

Mounting dimensions

Ø12 13/16″cutout Ø11 3/16″mounting depth 8 7/16″magnet Ø9 11/16″
Cutout diameter11 3/16″
Mounting depth8 7/16″
Overall diameter12 13/16″
Magnet diameter9 11/16″

The spec sheet's Sd of 114 in² is the area of a 12″ circle, not the cone's radiating area — not used.

Cone area (Sd) calculated from Fs, Vas and Mms: 77.8 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 12″ models