Planet Audio AC15D

15″ subwoofer · dual 4 Ω · 1,050 W RMS

Fs 25 HzQts 0.68Vas 8.00 ft³Xmax 0.51″

Recommended box

For a sedan, one sub, 1,050 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 volume2.83 ft³ (80 L)
Qtc1.32
Fc49 Hz
F3 (−3 dB, no cabin gain)37 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 12″
Open sealed box in designer

Ported

Net volume4.80 ft³ (136 L)
Tuning (Fb)37 Hz
Portslot 2 15/16 × 16 5/16″, 13 13/16″ long
Port velocity at 1,050 W66 ft/s
F3 (−3 dB, no cabin gain)33 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 20 9/16″
Open ported box in designer
2030405060801001502007278849096102HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs25 Hz
Qts0.68
Qes0.759
Qms6.15
Vas8.00 ft³
Re (one coil)≈ 3.4 Ω
Sd≈ 124 in²
Xmax0.51″
EBP33 — suits sealed calc.
Sensitivity, 1 W / 1 m88.7 dB calc.

General

Size15″
Voice coilsdual 4 Ω
RMS power1,050 W

Mounting dimensions

Ø≈ 15 1/16″cutout Ø13 7/8″mounting depth 7″magnet Ø≈ 9″
Cutout diameter13 7/8″
Mounting depth7″

“≈” 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