Fi Audio Xv4 12 D1

12″ subwoofer · dual 1 Ω · 1,500 W RMS

Fs 40.1 HzQts 0.47Vas 0.57 ft³Xmax 1.06″

Recommended box

For a sedan, one sub, 1,500 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 volume0.67 ft³ (19 L)
Qtc0.64
Fc55 Hz
F3 (−3 dB, no cabin gain)63 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 9 11/16″
Open sealed box in designer

Ported

Net volume1.41 ft³ (40 L)
Tuning (Fb)32 Hz
Portslot 1 3/4 × 14 5/16″, 42 3/4″ long
Port velocity at 1,500 W101 ft/s
F3 (−3 dB, no cabin gain)29 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 10 7/8″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs40.1 Hz
Qts0.47
Qes0.51
Qms5.81
Vas0.57 ft³
Re (one coil)0.8 Ω
Sd74.4 in²
Xmax1.06″
Vd79.1 in³ calc.
Mms319 g calc.
BL11.2 T·m calc.
EBP79 — sealed or ported calc.
Sensitivity, 1 W / 1 m85.1 dB calc.

General

Size12″
Voice coilsdual 1 Ω
RMS power1,500 W

Mounting dimensions

Ø12 5/8″cutout Ø11 1/16″mounting depth 7 1/8″magnet Ø≈ 7 3/16″
Cutout diameter11 1/16″
Mounting depth7 1/8″
Overall diameter12 5/8″

“≈” 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 Fi Audio 12″ models