Rockford Fosgate Punch P3D2-15

15″ subwoofer · dual 2 Ω · 600 W RMS

21.7 HzFs, resonance
0.54Qts
5.50 ft³Vas
0.60″Xmax
600 WRMS

Recommended box

For a sedan, one sub, 600 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

smaller, tighter
3.14 ft³ (89 L)
Net volume
Qtc0.89
Fc36 Hz
F3 (−3 dB, no cabin gain)32 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 13 1/8″
Open sealed box in designer

Ported

deeper, louder
5.37 ft³ (152 L)
Net volume
Tuning (Fb)26 Hz
Portslot 2 3/8 × 16 5/16″, 23 1/4″ long
Port velocity at 600 W63 ft/s
F3 (−3 dB, no cabin gain)24 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 23 3/16″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs21.7 Hz
Qts0.54
Qes0.58
Qms7.2
Vas5.50 ft³
Re (one coil)1.6 Ω
Sd138.6 in²
Xmax0.60″
Vd82.9 in³ calc.
Mms391 g calc.
BL12.1 T·m calc.
EBP37 — suits sealed calc.
Sensitivity, 1 W / 1 m86.4 dB calc.

General

Size15″
Voice coilsdual 2 Ω
RMS power600 W

Mounting dimensions

Ø≈ 15 1/16″cutout Ø13 7/8″mounting depth 7 5/8″magnet Ø≈ 9 1/16″
Cutout diameter13 7/8″
Mounting depth7 5/8″

“≈” 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