Fi Car Audio HT-1 18 S2

2Ω
4Ω

Subwoofer

Nominal diameter18″ / 470 mm
Resonance20.7 Hz
Q factor0.53
Sensitivity87.9 dB
Linear excursion± 27 mm
Program Power2000 W
Fi Car Audio HT-1 18 S2 SubwooferFi Car Audio HT-1 18 S2 SubwooferFi Car Audio HT-1 18 S2 Subwoofer
Excursion
Velocity
SPL
Phase
Group delay
mm05101520101001 00010 000Diaphragm ExcursionMaximum Linear Excursion
m/s00.20.40.60.81101001 00010 000Diaphragm Velocity
dB60708090100110120101001 00010 000SPL (1W, 1m, on axis)Maximum SPL
°-180-120-60060120180101001 00010 000Acoustical phase (1m, on axis)
ms0246810101001 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

Specifications

  • Sensitivity (1W, 1m, infinite baffle) SPL1W 87.9dB

Thiele & Small parameters

  • Resonance frequency (free air) fS 20.7Hz
  • Mechanical quality factor QMS 6.89
  • Electrical quality factor QES 0.59
  • Total quality factor QTS 0.53

Large signal parameters

  • Maximum linear excursion xmax 27mm
  • Air volume displaced at xmax VD 3267cm³
  • Power handling P 1000W
  • Program power Pmax 2000W

Voice Coil

  • Nominal impedance Z 2Ω
  • DC resistance RE 1.4Ω
  • Inductance (1kHz, estimated) LE 1.94mH

Magnet

  • Force factor Bl 12.9N/A
  • Motor constant Bl/√RE 11.1N/√W

Diaphragm

  • Effective diameter 393mm
  • Effective area SD 1210cm²
  • Moving mass MMS 525g
  • Moving mass (without air load) MMD 495g

Suspensions

  • Stiffness KMS 9.23N/mm
  • Compliance CMS 108µm/N
  • Equivalent volume to the compliance VAS 222L
  • Mechanical resistance RMS 9.91N·s/m

Dimensions

  • Nominal diameter 18″
  • 470mm
  • Overall diameter 470mm
  • Baffle cutout diameter 425mm
  • Mounting depth 165mm
  • Volume occupied by the driver 5.1L
Impedance
Step response
Tone Burst
Ω°0102030405060101001 00010 000-180-120-60060120180Electrical ImpedanceElectrical Phase
00.51-205101520Step response
-1-0.500.51-2010203040Response to a tone burst of Hz with cycles

Export this driver to a simulation software:

Closed Box Simulator·Speakerbench logoSpeakerbenchWinISD logoWinISDBasta! logoBasta!Hornresp logoHornrespQSpeakers logoQSpeakersSpeakerSim logoSpeakerSimMfbLabs logoMfbLabs

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