Rockville W8K6D4 V2

8″ subwoofer · dual 4 Ω · 350 W RMS

Fs 52.6 HzQts 0.51Vas 0.18 ft³Xmax 0.59″

Recommended box

For a sedan, one sub, 350 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 volume0.28 ft³ (8 L)
Qtc0.65
Fc67 Hz
F3 (−3 dB, no cabin gain)77 Hz
Example box (outside)11″ × 11″ × 7 3/8″
Open sealed box in designer

Ported

Net volume0.60 ft³ (17 L)
Tuning (Fb)41 Hz
Portround port Ø2 1/2″, 11 3/8″ long
Port velocity at 350 W178 ft/s
F3 (−3 dB, no cabin gain)36 Hz
Example box (outside)16 13/16″ × 15 3/4″ × 6 11/16″
Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs52.6 Hz
Qts0.51
Qes0.624
Qms2.69
Vas0.18 ft³
Re (one coil)4 Ω
Sd31.1 in²
Xmax0.59″
Vd18.4 in³ calc.
Mms104 g calc.
BL14.9 T·m calc.
EBP84 — sealed or ported calc.
Sensitivity, 1 W / 1 m82.7 dB calc.

General

Size8″
Voice coilsdual 4 Ω
RMS power350 W

Mounting dimensions

Ø≈ 9″cutout Ø7 13/16″mounting depth 4 1/8″magnet Ø5″
Cutout diameter7 13/16″
Mounting depth4 1/8″
Magnet diameter5″

“≈” 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