Rockford Fosgate Punch P2D2-15

15″ subwoofer · dual 2 Ω · 400 W RMS

Fs 20 HzQts 0.62Vas 7.76 ft³Xmax 0.52″

Recommended box

For a sedan, one sub, 400 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 volume3.14 ft³ (89 L)
Qtc1.16
Fc37 Hz
F3 (−3 dB, no cabin gain)29 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 13 1/8″
Open sealed box in designer

Ported

Net volume5.37 ft³ (152 L)
Tuning (Fb)29 Hz
Portslot 1 15/16 × 16 5/16″, 14 5/16″ long
Port velocity at 400 W61 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 22 3/16″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs20 Hz
Qts0.62
Qes0.69
Qms6.4
Vas7.76 ft³
Re (one coil)1.65 Ω
Sd138.6 in²
Xmax0.52″
Vd72.6 in³ calc.
Mms326 g calc.
BL9.9 T·m calc.
EBP29 — suits sealed calc.
Sensitivity, 1 W / 1 m86.1 dB calc.

General

Size15″
Voice coilsdual 2 Ω
RMS power400 W

Mounting dimensions

Ø≈ 15 1/16″cutout Ø13 7/8″mounting depth 7 3/8″magnet Ø≈ 9 1/16″
Cutout diameter13 7/8″
Mounting depth7 3/8″

“≈” 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 Rockford Fosgate 15″ models