Rockford Fosgate Punch Z RFZ3412

12″ subwoofer · 4 Ω · 150 W RMS

Fs 25 HzQts 0.40Vas 5.76 ft³Xmax 0.30″

Recommended box

For a sedan, one sub, 150 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 volume1.91 ft³ (54 L)
Qtc0.80
Fc50 Hz
F3 (−3 dB, no cabin gain)48 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 9 1/2″
Open sealed box in designer

Ported

Net volume3.25 ft³ (92 L)
Tuning (Fb)34 Hz
Portslot 1 9/16 × 14 5/16″, 12 1/8″ long
Port velocity at 150 W46 ft/s
F3 (−3 dB, no cabin gain)33 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 15 3/4″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs25 Hz
Qts0.40
Qes0.43
Qms5.47
Vas5.76 ft³
Re4.3 Ω
Sd84 in²
Xmax0.30″
Vd25.5 in³ calc.
Mms103 g calc.
BL12.7 T·m calc.
EBP58 — sealed or ported calc.
Sensitivity, 1 W / 1 m89.7 dB calc.

General

Size12″
Voice coils4 Ω
RMS power150 W

Mounting dimensions

Ø≈ 12 5/16″cutout Ø11 1/8″mounting depth 5 1/4″magnet Ø≈ 7 1/4″
Cutout diameter11 1/8″
Mounting depth5 1/4″

“≈” 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