Fi Audio BTL-NEO12 D2

12″ subwoofer · dual 2 Ω · 2,500 W RMS

Fs 33.9 HzQts 0.25Vas 0.88 ft³Xmax 1.34″

Recommended box

For a sedan, one sub, 2,500 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 volume1.06 ft³ (30 L)
Qtc0.34
Fc46 Hz
F3 (−3 dB, no cabin gain)122 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 13 13/16″
Open sealed box in designer

Ported

Net volume1.41 ft³ (40 L)
Tuning (Fb)28 Hz
Portslot 1 15/16 × 14 5/16″, 63 11/16″ long
Port velocity at 2,500 W117 ft/s
F3 (−3 dB, no cabin gain)108 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 12 5/8″

The volume and tuning are the recommendation, but the port doesn’t fit this example box. Size the box and port in the designer.

Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs33.9 Hz
Qts0.25
Qes0.26
Qms6.15
Vas0.88 ft³
Re (one coil)1.8 Ω
Sd74.4 in²
Xmax1.34″
Vd99.6 in³ calc.
Mms289 g calc.
BL20.6 T·m calc.
EBP130 — suits ported calc.
Sensitivity, 1 W / 1 m87.7 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power2,500 W

Mounting dimensions

Ø12 1/2″cutout Ø11 1/8″mounting depth 11 1/4″magnet Ø≈ 7 1/4″
Cutout diameter11 1/8″
Mounting depth11 1/4″
Overall diameter12 1/2″

“≈” 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