Sundown Audio M15 D1

15″ subwoofer · dual 1 Ω · 2,000 W RMS

Fs 28.2 HzQts 0.63Vas 1.52 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 volume2.54 ft³ (72 L)
Qtc0.80
Fc36 Hz
F3 (−3 dB, no cabin gain)33 Hz
Example box (outside)16 15/16″ × 16 15/16″ × 20 15/16″
Open sealed box in designer

Ported

Net volume4.38 ft³ (124 L)
Tuning (Fb)25 Hz
Portslot 4 5/16 × 16 5/16″, 62″ long
Port velocity at 2,000 W64 ft/s
F3 (−3 dB, no cabin gain)21 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 27 1/2″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs28.2 Hz
Qts0.63
Qes0.72
Qms5.23
Vas1.52 ft³
Re (one coil)1.05 Ω
Sd113.3 in²
Xmax1.38″
Vd156.1 in³ calc.
Mms559 g calc.
BL12 T·m calc.
EBP39 — suits sealed calc.
Sensitivity, 1 W / 1 m83.3 dB calc.

General

Size15″
Voice coilsdual 1 Ω
RMS power2,000 W

Mounting dimensions

Ø15 1/2″cutout Ø13 15/16″mounting depth 12 1/16″magnet Ø7 7/8″
Cutout diameter13 15/16″
Mounting depth12 1/16″
Overall diameter15 1/2″
Magnet diameter7 7/8″

The spec sheet's Sd of 177 in² is the area of a 15″ circle, not the cone's radiating area — not used.

Cone area (Sd) calculated from Fs, Vas and Mms: 113.3 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 15″ models