Fi Car Audio BL12v3.1 D2

2x1Ω
2x2Ω

Subwoofer

Nominal diameter12″ / 318 mm
Resonance36.6 Hz
Q factor0.30
Sensitivity88.3 dB
Linear excursion± 20 mm
Program Power3500 W
Driver
Port
Combined
Frequency response
Hz
Impedance
Ω
Impedance Phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical Phase
°
Group Delay
ms
Transient response
ms
Discard
Apply

Specifications

  • Sensitivity (1W, 1m, infinite baffle) SPL1W 88.3dB

Thiele & Small parameters

  • Resonance frequency (free air) fS 36.6Hz
  • Mechanical quality factor QMS 7.46
  • Electrical quality factor QES 0.33
  • Total quality factor QTS 0.30

Large signal parameters

  • Maximum linear excursion xmax 20mm
  • Air volume displaced at xmax VD 960cm³
  • Power handling P 1750W
  • Program power Pmax 3500W

Voice Coil

  • Nominal impedance Z 2 x 2Ω
  • DC resistance (in series) RE 2.8Ω
  • Inductance (1kHz, in series, estimated) LE 2.28mH

Magnet

  • Force factor (in series) Bl 21.9N/A
  • Motor constant Bl/√RE 13.1N/√W

Diaphragm

  • Effective diameter 247mm
  • Effective area SD 480cm²
  • Moving mass MMS 225g
  • Moving mass (without air load) MMD 217g

Suspensions

  • Stiffness KMS 11.9N/mm
  • Compliance CMS 83.7µm/N
  • Equivalent volume to the compliance VAS 27L
  • Mechanical resistance RMS 6.94N·s/m

Dimensions

  • Nominal diameter 12
  • 318mm
  • Overall diameter 318mm
  • Baffle cutout diameter 283mm
  • Mounting depth 171mm
  • Volume occupied by the driver 5.1L


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fS31 Hz
SD346 cm²
30 - 300 Hz
QTS0.26
xmax9 mm
SPL1W87.9 dB
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Pmax500 W