Celestion CF1830E

Low frequency

Nominal diameter18″ / 457 mm
Resonance40.5 Hz
Q factor0.34
Sensitivity95.8 dB
Linear excursion± 5 mm
Program power1400 W
Discontinued
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 95.8dB
  • Frequency response 30 - 2500Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 40.5Hz
  • Mechanical quality factor QMS 4.37
  • Electrical quality factor QES 0.37
  • Total quality factor QTS 0.34

Large signal parameters

  • Maximum linear excursion (one way) xmax 5mm
  • Air volume displaced at xmax VD 567cm³
  • Power handling P 700W
  • Program power Pmax 1400W

Voice Coil

  • Nominal impedance Z 8Ω
  • DC resistance RE 5.3Ω
  • Inductance (1kHz) LE 3.24mH
  • VC Diameter 75mm
  • Winding height HVC 18mm
  • Winding material Round Copper
  • Former material Glass Fibre

Magnet

  • Force factor Bl 24.6N/A
  • Motor constant Bl/√RE 10.7N/√W
  • Air gap height HAG 8mm
  • Material Ferrite

Diaphragm

  • Effective diameter 380mm
  • Effective area SD 1134cm²
  • Moving mass (including air load) MMS 167g
  • Moving mass MMD 140g
  • Material Glass Fibre

Suspensions

  • Stiffness KMS 10.9N/mm
  • Compliance CMS 92µm/N
  • Equivalent volume to the compliance VAS 168L
  • Mechanical resistance RMS 9.33N·s/m
  • Surround material Cloth

Dimensions

  • Nominal diameter 18
  • 457mm
  • Overall diameter 460mm
  • Baffle cutout diameter 414mm
  • Overall depth 211mm
  • Volume occupied by the driver (estimated) 6.8L
  • Frame material Cast Aluminium
Celestion CF1830E SPL

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