DC Audio Level 2 M4 12 D2

12″ subwoofer · dual 2 Ω · 750 W RMS

Fs 41.5 HzQts 0.80Vas 0.65 ft³Xmax 0.87″

Recommended box

For a sedan, one sub, 750 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 volume1.31 ft³ (37 L)
Qtc0.98
Fc51 Hz
F3 (−3 dB, no cabin gain)42 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 16 7/16″
Open sealed box in designer

Ported

Net volume3.00 ft³ (85 L)
Tuning (Fb)29 Hz
Portslot 2 3/4 × 14 5/16″, 36 5/8″ long
Port velocity at 750 W63 ft/s
F3 (−3 dB, no cabin gain)25 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 17 15/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs41.5 Hz
Qts0.80
Qes1.003
Qms3.94
Vas0.65 ft³
Re (one coil)≈ 1.7 Ω
Sd77.8 in²
Xmax0.87″
Vd67.4 in³ calc.
Mms284 g calc.
BL11.2 T·m calc.
EBP41 — suits sealed calc.
Sensitivity, 1 W / 1 m83.2 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power750 W

Mounting dimensions

Ø12 1/2″cutout Ø11″mounting depth 6 1/2″magnet Ø≈ 7 1/8″
Cutout diameter11″
Mounting depth6 1/2″
Overall diameter12 1/2″

“≈” 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 DC Audio 12″ models