Rockford Fosgate Punch HE2 RFP4210

10″ subwoofer · dual 4 Ω · 400 W RMS

Fs 27 HzQts 0.47Vas 1.20 ft³Xmax 0.51″

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 volume0.64 ft³ (18 L)
Qtc0.79
Fc46 Hz
F3 (−3 dB, no cabin gain)44 Hz
Example box (outside)12 5/8″ × 12 5/8″ × 11 1/16″
Open sealed box in designer

Ported

Net volume2.01 ft³ (57 L)
Tuning (Fb)26 Hz
Portslot 1 9/16 × 14 5/16″, 40 7/16″ long
Port velocity at 400 W60 ft/s
F3 (−3 dB, no cabin gain)24 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 12 5/8″
Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs27 Hz
Qts0.47
Qes0.51
Qms5.59
Vas1.20 ft³
Re (one coil)3.23 Ω
Sd52.1 in²
Xmax0.51″
Vd26.7 in³ calc.
Mms164 g calc.
BL13.3 T·m calc.
EBP53 — sealed or ported calc.
Sensitivity, 1 W / 1 m83.2 dB calc.

General

Size10″
Voice coilsdual 4 Ω
RMS power400 W

Mounting dimensions

Ø10 1/2″cutout Ø9 5/16″mounting depth 5 7/8″magnet Ø≈ 6 1/16″
Cutout diameter9 5/16″
Mounting depth5 7/8″
Overall diameter10 1/2″

Cone area (Sd) calculated from Fs, Vas and Mms: 52.1 in².

Judging by its value, the published Re is for both coils in series — 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 10″ models