Helix IK W8-DVC2 (2x2 Ohm)

8″ subwoofer · dual 2 Ω · 300 W RMS

Fs 37 HzQts 0.41Vas 0.60 ft³Xmax 0.31″

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 volume0.32 ft³ (9 L)
Qtc0.69
Fc63 Hz
F3 (−3 dB, no cabin gain)68 Hz
Example box (outside)10 1/4″ × 10 1/4″ × 9 1/4″
Open sealed box in designer

Ported

Net volume0.67 ft³ (19 L)
Tuning (Fb)38 Hz
Portround port Ø2 1/2″, 11 15/16″ long
Port velocity at 300 W156 ft/s
F3 (−3 dB, no cabin gain)36 Hz
Example box (outside)19 11/16″ × 15 3/4″ × 6 1/2″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs37 Hz
Qts0.41
Qes0.46
Qms3.56
Vas0.60 ft³
Re (one coil)1.6 Ω
Sd33.9 in²
Xmax0.31″
Vd10.7 in³ calc.
Mms74 g calc.
BL7.7 T·m calc.
EBP80 — sealed or ported calc.
Sensitivity, 1 W / 1 m84.7 dB calc.

General

Size8″
Voice coilsdual 2 Ω
RMS power300 W

Mounting dimensions

Ø8 7/16″cutout Ø7 3/16″mounting depth 4″magnet Ø≈ 4 11/16″
Cutout diameter7 3/16″
Mounting depth4″
Overall diameter8 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 Helix 8″ models