B2 Audio HN12v3 D2

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

Fs 32.5 HzQts 0.38Vas 1.17 ft³Xmax 0.91″

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 volume0.71 ft³ (20 L)
Qtc0.62
Fc53 Hz
F3 (−3 dB, no cabin gain)64 Hz
Example box (outside)14 9/16″ × 14 9/16″ × 9 9/16″
Open sealed box in designer

Ported

Net volume1.45 ft³ (41 L)
Tuning (Fb)32 Hz
Portslot 1 3/4 × 14 5/16″, 41 5/8″ long
Port velocity at 1,500 W96 ft/s
F3 (−3 dB, no cabin gain)31 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

Fs32.5 Hz
Qts0.38
Qes0.41
Qms5.32
Vas1.17 ft³
Re (one coil)1.9 Ω
Sd≈ 76 in²
Xmax0.91″
EBP79 — sealed or ported calc.
Sensitivity, 1 W / 1 m86.4 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power1,500 W

Mounting dimensions

Ø12 5/8″cutout ≈ Ø11 5/16″mounting depth ≈ 5 7/8″magnet Ø≈ 7 3/8″
Cutout diameter≈ 11 5/16″
Mounting depth≈ 5 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 B2 Audio 12″ models