Kicker CompRT 8" 4-Ohm DVC (48CWRT84)

8″ subwoofer · dual 4 Ω · 300 W RMS

Fs 41.8 HzQts 0.76Vas 0.37 ft³Xmax 0.38″

Recommended box

For a sedan, one sub, 300 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 volume0.71 ft³ (20 L)
Qtc0.94
Fc52 Hz
F3 (−3 dB, no cabin gain)43 Hz
Example box (outside)10 1/4″ × 10 1/4″ × 17 7/8″
Open sealed box in designer

Ported

Net volume1.24 ft³ (35 L)
Tuning (Fb)33 Hz
Portslot 1 9/16 × 14 5/16″, 40 7/8″ long
Port velocity at 300 W49 ft/s
F3 (−3 dB, no cabin gain)28 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 9 7/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs41.8 Hz
Qts0.76
Qes0.829
Qms9.1
Vas0.37 ft³
Re (one coil)3.83 Ω
Sd31.6 in²
Xmax0.38″
Vd12.1 in³ calc.
Mms82 g calc.
BL10 T·m calc.
EBP50 — sealed or ported calc.
Sensitivity, 1 W / 1 m81.6 dB calc.

General

Size8″
Voice coilsdual 4 Ω
RMS power300 W

Mounting dimensions

Ø8 1/2″cutout Ø6 15/16″mounting depth 2 5/8″magnet Ø5 7/16″
Cutout diameter6 15/16″
Mounting depth2 5/8″
Overall diameter8 1/2″
Magnet diameter5 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 Kicker 8″ models