Kicker CompVR 18" 4-Ohm DVC (CVR18, 2003)

18″ subwoofer · dual 4 Ω

Fs 18.2 HzQts 0.42Vas 15.61 ft³Xmax 0.57″

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 volume4.17 ft³ (118 L)
Qtc0.91
Fc40 Hz
F3 (−3 dB, no cabin gain)35 Hz
Example box (outside)31 1/2″ × 20 1/16″ × 15 1/8″
Open sealed box in designer

Ported

Net volume7.06 ft³ (200 L)
Tuning (Fb)28 Hz
Portslot 1 3/4 × 18 11/16″, 11 3/16″ long
Port velocity at 300 W59 ft/s
F3 (−3 dB, no cabin gain)27 Hz
Example box (outside)31 1/2″ × 20 1/16″ × 24 7/8″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs18.2 Hz
Qts0.42
Qes0.436
Qms10.41
Vas15.61 ft³
Re (one coil)3.69 Ω
Sd182.6 in²
Xmax0.57″
Vd104.2 in³ calc.
Mms340 g calc.
BL18.1 T·m calc.
EBP42 — suits sealed calc.
Sensitivity, 1 W / 1 m89.9 dB calc.

General

Size18″
Voice coilsdual 4 Ω
RMS power—

Mounting dimensions

Ø≈ 17 1/2″cutout Ø16 5/16″mounting depth 8 1/4″magnet Ø≈ 10 5/8″
Cutout diameter16 5/16″
Mounting depth8 1/4″

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 Kicker 18″ models