Sundown Audio M12 D2

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

Fs 32.7 HzQts 0.60Vas 0.53 ft³Xmax 1.38″

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 volume1.02 ft³ (29 L)
Qtc0.74
Fc40 Hz
F3 (−3 dB, no cabin gain)40 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 13 7/16″
Open sealed box in designer

Ported

Net volume1.84 ft³ (52 L)
Tuning (Fb)25 Hz
Portround port Ø2 1/2″, 9 3/4″ long
Port velocity at 2,000 W601 ft/s
F3 (−3 dB, no cabin gain)22 Hz
Example box (outside)21 1/2″ × 15 3/4″ × 13 3/8″
Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs32.7 Hz
Qts0.60
Qes0.686
Qms4.77
Vas0.53 ft³
Re (one coil)2.04 Ω
Sd70.9 in²
Xmax1.38″
Vd97.7 in³ calc.
Mms467 g calc.
BL16.9 T·m calc.
EBP48 — suits sealed calc.
Sensitivity, 1 W / 1 m80.9 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power2,000 W

Mounting dimensions

Ø12 11/16″cutout Ø11 1/8″mounting depth 10 7/8″magnet Ø7 7/8″
Cutout diameter11 1/8″
Mounting depth10 7/8″
Overall diameter12 11/16″
Magnet diameter7 7/8″

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: 70.9 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 12″ models