Rockville W8K5S2

8″ subwoofer · 2 Ω · 200 W RMS

Fs 45.3 HzQts 0.61Vas 0.42 ft³

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 volume0.57 ft³ (16 L)
Qtc0.80
Fc60 Hz
F3 (−3 dB, no cabin gain)56 Hz
Example box (outside)10 5/8″ × 10 5/8″ × 13 5/8″
Open sealed box in designer

Ported

Net volume1.20 ft³ (34 L)
Tuning (Fb)35 Hz
Portslot 1 9/16 × 14 5/16″, 37 1/16″ long
Port velocity at 200 W40 ft/s
F3 (−3 dB, no cabin gain)31 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 9″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs45.3 Hz
Qts0.61
Qes0.662
Qms7.47
Vas0.42 ft³
Re2 Ω
Sd31.2 in²
Xmax≈ 0.39″
Mms60 g calc.
BL7.2 T·m calc.
EBP68 — sealed or ported calc.
Sensitivity, 1 W / 1 m84.2 dB calc.

General

Size8″
Voice coils2 Ω
RMS power200 W

Mounting dimensions

Ø≈ 8 7/16″cutout Ø7 5/16″mounting depth 3 9/16″magnet Ø4 3/4″
Cutout diameter7 5/16″
Mounting depth3 9/16″
Magnet diameter4 3/4″

“≈” 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 Rockville 8″ models