Fi Car Audio IB315 v2 S2

Subwoofer

Nominal diameter15″ / 397 mm
Resonance26.1 Hz
Q factor0.76
Sensitivity86.7 dB
Linear excursion± 34 mm
Program Power1200 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
  • Sensitivity (1W, 1m, infinite baffle) SPL1W 86.7dB

Thiele & Small parameters

  • Resonance frequency (free air) fS 26.1Hz
  • Mechanical quality factor QMS 8.73
  • Electrical quality factor QES 0.83
  • Total quality factor QTS 0.76

Large signal parameters

  • Maximum linear excursion xmax 34mm
  • Air volume displaced at xmax VD 2754cm³
  • Power handling P 600W
  • Program power Pmax 1200W

Voice Coil

  • Nominal impedance Z 2Ω
  • DC resistance RE 1.8Ω
  • Inductance (1kHz, estimated) LE 1.77mH

Magnet

  • Force factor Bl 10.6N/A
  • Motor constant Bl/√RE 7.9N/√W

Diaphragm

  • Effective diameter 321mm
  • Effective area SD 810cm²
  • Moving mass MMS 298g
  • Moving mass (without air load) MMD 281g

Suspensions

  • Stiffness KMS 7.87N/mm
  • Compliance CMS 127µm/N
  • Equivalent volume to the compliance VAS 115L
  • Mechanical resistance RMS 5.6N·s/m

Dimensions

  • Nominal diameter 15
  • 397mm
  • Overall diameter 397mm
  • Baffle cutout diameter 359mm
  • Mounting depth 203mm
  • Volume occupied by the driver 4.81L


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