Rockford Fosgate Punch P2D4-12

12″ subwoofer · dual 4 Ω · 400 W RMS

Fs 27.2 HzQts 0.54Vas 2.88 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 volume2.01 ft³ (57 L)
Qtc0.84
Fc42 Hz
F3 (−3 dB, no cabin gain)39 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 9 15/16″
Open sealed box in designer

Ported

Net volume3.43 ft³ (97 L)
Tuning (Fb)30 Hz
Portslot 1 15/16 × 14 5/16″, 20 1/16″ long
Port velocity at 400 W62 ft/s
F3 (−3 dB, no cabin gain)27 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 17 1/4″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs27.2 Hz
Qts0.54
Qes0.59
Qms6.3
Vas2.88 ft³
Re (one coil)3.2 Ω
Sd88.4 in²
Xmax0.52″
Vd46.3 in³ calc.
Mms193 g calc.
BL13.4 T·m calc.
EBP46 — suits sealed calc.
Sensitivity, 1 W / 1 m86.4 dB calc.

General

Size12″
Voice coilsdual 4 Ω
RMS power400 W

Mounting dimensions

Ø≈ 12 3/8″cutout Ø11 1/4″mounting depth 6 3/8″magnet Ø≈ 7 5/16″
Cutout diameter11 1/4″
Mounting depth6 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 12″ models