Rockford Fosgate Punch P3SD2-12 (Shallow)

12″ subwoofer · dual 2 Ω · 400 W RMS

Fs 34 HzQts 0.67Vas 1.25 ft³Xmax 0.33″

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 volume1.77 ft³ (50 L)
Qtc0.88
Fc44 Hz
F3 (−3 dB, no cabin gain)39 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 8 15/16″
Open sealed box in designer

Ported

Net volume3.00 ft³ (85 L)
Tuning (Fb)30 Hz
Portslot 1 15/16 × 14 5/16″, 23 1/2″ long
Port velocity at 400 W63 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 15 13/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs34 Hz
Qts0.67
Qes0.75
Qms6.6
Vas1.25 ft³
Re (one coil)1.7 Ω
Sd77.5 in²
Xmax0.33″
Vd25.6 in³ calc.
Mms220 g calc.
BL10.3 T·m calc.
EBP45 — suits sealed calc.
Sensitivity, 1 W / 1 m84.7 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power400 W

Mounting dimensions

Ø≈ 12 3/8″cutout Ø11 1/4″mounting depth 3 11/16″magnet Ø≈ 7 5/16″
Cutout diameter11 1/4″
Mounting depth3 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 Rockford Fosgate 12″ models