Fi Audio BL12 D2

12″ subwoofer · dual 2 Ω · 1,500 W RMS

Fs 39.8 HzQts 0.24Vas 1.10 ft³Xmax 0.71″

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)
Qtc0.39
Fc65 Hz
F3 (−3 dB, no cabin gain)146 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)36 Hz
Portslot 2 3/16 × 14 5/16″, 40 11/16″ long
Port velocity at 1,500 W90 ft/s
F3 (−3 dB, no cabin gain)132 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 11 3/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs39.8 Hz
Qts0.24
Qes0.25
Qms4.72
Vas1.10 ft³
Re (one coil)1.4 Ω
Sd74.4 in²
Xmax0.71″
Vd52.7 in³ calc.
Mms167 g calc.
BL15.3 T·m calc.
EBP159 — suits ported calc.
Sensitivity, 1 W / 1 m91 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power1,500 W

Mounting dimensions

Ø12 1/2″cutout Ø11 1/8″mounting depth 6 3/4″magnet Ø≈ 7 1/4″
Cutout diameter11 1/8″
Mounting depth6 3/4″
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