Sundown Audio SAv3-12 D2

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

Fs 35 HzQts 0.43Vas 0.78 ft³Xmax 0.87″

Recommended box

For a sedan, one sub, 1,500 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 volume0.78 ft³ (22 L)
Qtc0.61
Fc50 Hz
F3 (−3 dB, no cabin gain)61 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 10 13/16″
Open sealed box in designer

Ported

Net volume1.55 ft³ (44 L)
Tuning (Fb)30 Hz
Port2 round ports Ø2 1/2″, 17 3/16″ long
Port velocity at 1,500 W244 ft/s
F3 (−3 dB, no cabin gain)28 Hz
Example box (outside)24 7/16″ × 15 3/4″ × 10 13/16″
Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs35 Hz
Qts0.43
Qes0.525
Qms2.31
Vas0.78 ft³
Re (one coil)1.7 Ω
Sd82 in²
Xmax0.87″
Vd71 in³ calc.
Mms370 g calc.
BL16.2 T·m calc.
EBP67 — sealed or ported calc.
Sensitivity, 1 W / 1 m84.6 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power1,500 W

Mounting dimensions

Ø12 13/16″cutout Ø11 3/16″mounting depth 8 3/8″magnet Ø7 13/16″
Cutout diameter11 3/16″
Mounting depth8 3/8″
Overall diameter12 13/16″
Magnet diameter7 13/16″

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: 82 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