DC Audio Level 3 15 D4

15″ subwoofer · dual 4 Ω · 1,000 W RMS

Fs 36.8 HzQts 0.94Vas 1.95 ft³Xmax 0.91″

Recommended box

For a sedan, one sub, 1,000 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 volume2.79 ft³ (79 L)
Qtc1.22
Fc48 Hz
F3 (−3 dB, no cabin gain)36 Hz
Example box (outside)31 1/2″ × 18 1/8″ × 11 5/8″
Open sealed box in designer

Ported

Net volume4.73 ft³ (134 L)
Tuning (Fb)34 Hz
Portslot 3 3/8 × 16 11/16″, 21 1/8″ long
Port velocity at 1,000 W64 ft/s
F3 (−3 dB, no cabin gain)27 Hz
Example box (outside)31 1/2″ × 18 1/8″ × 20 15/16″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs36.8 Hz
Qts0.94
Qes1.048
Qms8.93
Vas1.95 ft³
Re (one coil)≈ 3.4 Ω
Sd122.6 in²
Xmax0.91″
Vd111 in³ calc.
Mms301 g calc.
BL15 T·m calc.
EBP35 — suits sealed calc.
Sensitivity, 1 W / 1 m86.2 dB calc.

General

Size15″
Voice coilsdual 4 Ω
RMS power1,000 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