Rockford Fosgate Prime R2SD4-10 (Shallow)

10″ subwoofer · dual 4 Ω · 200 W RMS

Fs 39.3 HzQts 0.73Vas 0.77 ft³Xmax 0.31″

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 volume1.17 ft³ (33 L)
Qtc0.93
Fc51 Hz
F3 (−3 dB, no cabin gain)43 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 6 3/8″
Open sealed box in designer

Ported

Net volume2.01 ft³ (57 L)
Tuning (Fb)33 Hz
Portslot 1 9/16 × 14 5/16″, 23 5/8″ long
Port velocity at 200 W49 ft/s
F3 (−3 dB, no cabin gain)28 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 11 7/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs39.3 Hz
Qts0.73
Qes0.81
Qms7
Vas0.77 ft³
Re (one coil)3.3 Ω
Sd51.6 in²
Xmax0.31″
Vd16.3 in³ calc.
Mms119 g calc.
BL10.9 T·m calc.
EBP49 — suits sealed calc.
Sensitivity, 1 W / 1 m84.1 dB calc.

General

Size10″
Voice coilsdual 4 Ω
RMS power200 W

Mounting dimensions

Ø≈ 10 5/16″cutout Ø9 1/8″mounting depth 3 3/8″magnet Ø≈ 5 15/16″
Cutout diameter9 1/8″
Mounting depth3 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 10″ models