Fi Car Audio Alpha v2.1 10 S2

Subwoofer

Nominal diameter10″ / 279 mm
Resonance39.9 Hz
Q factor0.48
Sensitivity84.4 dB
Linear excursion± 17 mm
Program Power1500 W
mm05101520101001 00010 000Diaphragm Excursion
m/s0246810101001 00010 000Diaphragm Velocity
dB60708090100110120101001 00010 000SPL (1W, 1m, on axis)
°-180-120-60060120180101001 00010 000Acoustical phase (1m, on axis)
ms051015202530101001 00010 000Group Delay (1m, on axis)
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
  • Sensitivity (1W, 1m, infinite baffle) SPL1W 84.4dB

Thiele & Small parameters

  • Resonance frequency (free air) fS 39.9Hz
  • Mechanical quality factor QMS 6.93
  • Electrical quality factor QES 0.52
  • Total quality factor QTS 0.48

Large signal parameters

  • Maximum linear excursion xmax 17mm
  • Air volume displaced at xmax VD 527cm³
  • Power handling P 750W
  • Program power Pmax 1500W

Voice Coil

  • Nominal impedance Z 2Ω
  • DC resistance RE 1.8Ω
  • Inductance (1kHz, estimated) LE 1.18mH

Magnet

  • Force factor Bl 11.9N/A
  • Motor constant Bl/√RE 8.87N/√W

Diaphragm

  • Effective diameter 199mm
  • Effective area SD 310cm²
  • Moving mass MMS 163g
  • Moving mass (without air load) MMD 159g

Suspensions

  • Stiffness KMS 11N/mm
  • Compliance CMS 91.3µm/N
  • Equivalent volume to the compliance VAS 12.4L
  • Mechanical resistance RMS 5.9N·s/m

Dimensions

  • Nominal diameter 10
  • 279mm
  • Overall diameter 279mm
  • Baffle cutout diameter 235mm
  • Mounting depth 165mm
  • Volume occupied by the driver 3.96L
Ω°0102030405060101001 00010 000-180-120-60060120180Electrical ImpedanceElectrical Phase
Step response
Response to a tone burst of Hz with cycles


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