Helix IQ W12-DVC2 (2x2 Ohm)

12″ subwoofer · dual 2 Ω · 750 W RMS

Fs 36 HzQts 0.48Vas 1.24 ft³Xmax 0.47″

Recommended box

For a sedan, one sub, 750 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 volume0.74 ft³ (21 L)
Qtc0.79
Fc59 Hz
F3 (−3 dB, no cabin gain)56 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 10 7/16″
Open sealed box in designer

Ported

Net volume2.30 ft³ (65 L)
Tuning (Fb)32 Hz
Portslot 2 3/8 × 14 5/16″, 33 11/16″ long
Port velocity at 750 W65 ft/s
F3 (−3 dB, no cabin gain)29 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 14 5/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs36 Hz
Qts0.48
Qes0.53
Qms5.37
Vas1.24 ft³
Re (one coil)1.9 Ω
Sd79.8 in²
Xmax0.47″
Vd37.7 in³ calc.
Mms210 g calc.
BL13 T·m calc.
EBP68 — sealed or ported calc.
Sensitivity, 1 W / 1 m86.9 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power750 W

Mounting dimensions

Ø12 7/8″cutout Ø11 1/16″mounting depth 5 11/16″magnet Ø≈ 7 3/16″
Cutout diameter11 1/16″
Mounting depth5 11/16″
Overall diameter12 7/8″

“≈” 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 12″ models