DC Audio Level 4 M3 15 D4

15″ subwoofer · dual 4 Ω · 1,500 W RMS

Fs 30.6 HzQts 0.61Vas 2.83 ft³Xmax 0.93″

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 volume2.90 ft³ (82 L)
Qtc0.85
Fc43 Hz
F3 (−3 dB, no cabin gain)39 Hz
Example box (outside)31 1/2″ × 18 1/8″ × 12″
Open sealed box in designer

Ported

Net volume4.94 ft³ (140 L)
Tuning (Fb)30 Hz
Portslot 4 1/8 × 16 11/16″, 34 5/8″ long
Port velocity at 1,500 W63 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)31 1/2″ × 18 1/8″ × 24 3/8″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs30.6 Hz
Qts0.61
Qes0.644
Qms10.2
Vas2.83 ft³
Re (one coil)≈ 3.4 Ω
Sd127.6 in²
Xmax0.93″
Vd118 in³ calc.
Mms324 g calc.
BL18.1 T·m calc.
EBP48 — suits sealed calc.
Sensitivity, 1 W / 1 m87.5 dB calc.

General

Size15″
Voice coilsdual 4 Ω
RMS power1,500 W

Mounting dimensions

Ø15 11/16″cutout Ø14″mounting depth 8″magnet Ø≈ 9 1/8″
Cutout diameter14″
Mounting depth8″
Overall diameter15 11/16″

“≈” 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 15″ models