Helix IK S8-DVC2 (2x2 Ohm)

8″ subwoofer · dual 2 Ω · 300 W RMS

Fs 43 HzQts 0.51Vas 0.39 ft³Xmax 0.24″

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)
Qtc0.76
Fc64 Hz
F3 (−3 dB, no cabin gain)63 Hz
Example box (outside)10 1/4″ × 10 1/4″ × 9 1/4″
Open sealed box in designer

Ported

Net volume0.85 ft³ (24 L)
Tuning (Fb)36 Hz
Portround port Ø2 1/2″, 10 5/16″ long
Port velocity at 300 W182 ft/s
F3 (−3 dB, no cabin gain)33 Hz
Example box (outside)13 11/16″ × 15 3/4″ × 10 7/16″
Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs43 Hz
Qts0.51
Qes0.57
Qms4.79
Vas0.39 ft³
Re (one coil)1.8 Ω
Sd34.4 in²
Xmax0.24″
Vd8.1 in³ calc.
Mms87 g calc.
BL8.6 T·m calc.
EBP75 — sealed or ported calc.
Sensitivity, 1 W / 1 m83.9 dB calc.

General

Size8″
Voice coilsdual 2 Ω
RMS power300 W

Mounting dimensions

Ø8 3/8″cutout Ø7 1/16″mounting depth 3 1/8″magnet Ø≈ 4 5/8″
Cutout diameter7 1/16″
Mounting depth3 1/8″
Overall diameter8 3/8″

“≈” 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