NVX VCW124v3

12″ subwoofer · dual 4 Ω · 1,200 W RMS

Fs 29.4 HzQts 0.55Vas 2.36 ft³Xmax 0.91″

Recommended box

For a sedan, one sub, 1,200 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 volume1.87 ft³ (53 L)
Qtc0.82
Fc44 Hz
F3 (−3 dB, no cabin gain)41 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 9 3/8″
Open sealed box in designer

Ported

Net volume3.18 ft³ (90 L)
Tuning (Fb)31 Hz
Portslot 3 1/8 × 14 5/16″, 33 15/16″ long
Port velocity at 1,200 W65 ft/s
F3 (−3 dB, no cabin gain)28 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 18 3/4″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs29.4 Hz
Qts0.55
Qes0.62
Qms4.73
Vas2.36 ft³
Re (one coil)3.2 Ω
Sd82.2 in²
Xmax0.91″
Vd74.4 in³ calc.
Mms175 g calc.
BL12.9 T·m calc.
EBP47 — suits sealed calc.
Sensitivity, 1 W / 1 m86.4 dB calc.

General

Size12″
Voice coilsdual 4 Ω
RMS power1,200 W

Mounting dimensions

Ø12 5/8″cutout Ø11 3/16″mounting depth 6 7/8″magnet Ø≈ 7 1/4″
Cutout diameter11 3/16″
Mounting depth6 7/8″
Overall diameter12 5/8″

Judging by its value, the published Re is for both coils in series — converted to per coil.

“≈” 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 NVX 12″ models