Rockford Fosgate Prime R1S4-10

10″ subwoofer · 4 Ω · 200 W RMS

Fs 33.5 HzQts 0.58Vas 1.35 ft³Xmax 0.28″

Recommended box

For a sedan, one sub, 200 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 volume1.20 ft³ (34 L)
Qtc0.84
Fc49 Hz
F3 (−3 dB, no cabin gain)44 Hz
Example box (outside)12 3/16″ × 12 3/16″ × 20 3/16″
Open sealed box in designer

Ported

Net volume2.01 ft³ (57 L)
Tuning (Fb)34 Hz
Portslot 1 9/16 × 14 5/16″, 22″ long
Port velocity at 200 W46 ft/s
F3 (−3 dB, no cabin gain)30 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 11 5/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs33.5 Hz
Qts0.58
Qes0.62
Qms8.55
Vas1.35 ft³
Re3.5 Ω
Sd52.2 in²
Xmax0.28″
Vd14.4 in³ calc.
Mms95 g calc.
BL10.6 T·m calc.
EBP54 — sealed or ported calc.
Sensitivity, 1 W / 1 m85.6 dB calc.

General

Size10″
Voice coils4 Ω
RMS power200 W

Mounting dimensions

Ø≈ 10 1/4″cutout Ø9 1/16″mounting depth 4 7/16″magnet Ø≈ 5 7/8″
Cutout diameter9 1/16″
Mounting depth4 7/16″

“≈” 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 10″ models