Sundown Audio Xv3-12 D1

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

Fs 39.4 HzQts 0.52Vas 0.50 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 volume0.90 ft³ (25.5 L)
Qtc0.65
Fc49 Hz
F3 (−3 dB, no cabin gain)56 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 12 1/8″
Open sealed box in designer

Ported

Net volume1.34 ft³ (38 L)
Tuning (Fb)31 Hz
Portround port Ø2 1/2″, 8 1/2″ long
Port velocity at 2,500 W631 ft/s
F3 (−3 dB, no cabin gain)28 Hz
Example box (outside)17 7/8″ × 15 3/4″ × 12 3/16″
Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs39.4 Hz
Qts0.52
Qes0.58
Qms4.95
Vas0.50 ft³
Re (one coil)0.8 Ω
Sd71 in²
Xmax1.18″
Vd83.8 in³ calc.
Mms343 g calc.
BL10.8 T·m calc.
EBP68 — sealed or ported calc.
Sensitivity, 1 W / 1 m83.7 dB calc.

General

Size12″
Voice coilsdual 1 Ω
RMS power2,500 W

Mounting dimensions

Ø12 11/16″cutout Ø11 1/8″mounting depth 9 11/16″magnet Ø9 11/16″
Cutout diameter11 1/8″
Mounting depth9 11/16″
Overall diameter12 11/16″
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: 71 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