Helix IK W12-DVC2 (2x2 Ohm)

12″ subwoofer · dual 2 Ω · 300 W RMS

Fs 32 HzQts 0.41Vas 2.33 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 volume0.81 ft³ (23 L)
Qtc0.80
Fc63 Hz
F3 (−3 dB, no cabin gain)60 Hz
Example box (outside)14 9/16″ × 14 9/16″ × 10 9/16″
Open sealed box in designer

Ported

Net volume2.68 ft³ (76 L)
Tuning (Fb)33 Hz
Portslot 1 9/16 × 14 5/16″, 16 11/16″ long
Port velocity at 300 W65 ft/s
F3 (−3 dB, no cabin gain)31 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 13 3/4″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs32 Hz
Qts0.41
Qes0.46
Qms3.7
Vas2.33 ft³
Re (one coil)1.6 Ω
Sd79.8 in²
Xmax0.31″
Vd25.1 in³ calc.
Mms141 g calc.
BL9.9 T·m calc.
EBP70 — sealed or ported calc.
Sensitivity, 1 W / 1 m88.7 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power300 W

Mounting dimensions

Ø12 7/16″cutout Ø11 1/4″mounting depth 5 11/16″magnet Ø≈ 7 5/16″
Cutout diameter11 1/4″
Mounting depth5 11/16″
Overall diameter12 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 12″ models