Rockford Fosgate Punch HX2 RFD2212

12″ subwoofer · dual 4 Ω · 500 W RMS

Fs 26 HzQts 0.49Vas 2.65 ft³Xmax 0.55″

Recommended box

For a sedan, one sub, 500 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 volume1.55 ft³ (44 L)
Qtc0.80
Fc43 Hz
F3 (−3 dB, no cabin gain)41 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 19 1/16″
Open sealed box in designer

Ported

Net volume3.35 ft³ (95 L)
Tuning (Fb)27 Hz
Portslot 2 3/16 × 14 5/16″, 29 5/16″ long
Port velocity at 500 W61 ft/s
F3 (−3 dB, no cabin gain)25 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 17 15/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs26 Hz
Qts0.49
Qes0.52
Qms7.3
Vas2.65 ft³
Re (one coil)4.2 Ω
Sd87 in²
Xmax0.55″
Vd47.9 in³ calc.
Mms223 g calc.
BL17.1 T·m calc.
EBP50 — sealed or ported calc.
Sensitivity, 1 W / 1 m86 dB calc.

General

Size12″
Voice coilsdual 4 Ω
RMS power500 W

Mounting dimensions

Ø12 1/2″cutout Ø10 13/16″mounting depth 5 13/16″magnet Ø≈ 7 1/16″
Cutout diameter10 13/16″
Mounting depth5 13/16″
Overall diameter12 1/2″

Judging by its value, the published Re is for both coils in parallel — converted to per coil.

“≈” 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