Celestion CF1840JD 18" 1200W 8ohm LF Ferrite

Celestion - CF1840JD 1000W 8ohm - LF Die Cast Chassis Loudspeaker - Ferrite 18” Speaker with cast aluminum chassis, ferrite


magnet, 4" coil, 1200Watt power, 8ohm impedance

Features

- 18" ferrite magnet, cast chassis aluminum driver delivering 1200Wrms (AES Standard) power handling and 98dB sensitivity - 4" high temperature, dual layer, Inside/Outside voice coil for higher efficiency, preventing sensitivity loss through thermal compression

- FEA

optimized magnet assembly and suspension deliver highly symmetrical cone movement, leading to exceptionally low harmonic distortion

- Vented magnet assembly increases airflow to provide enhanced cooling -
Twin demodulation rings reduce flux modulation, minimizing electromagnetic distortion


- Double suspension and “multi-roll” surround provide exceptional linearity at extremes of cone excursion General

Specifications Nominal diameter: 457mm/18in Power rating (1): 1200Wrms Nominal

impedance: 8ohm

Sensitivity (2): 98dB

Frequency range: 30-2500Hz

Voice coil diameter: 100mm/4in

Chassis type: Cast aluminium

Magnet type: Ferrite

Magnet weight: 3.18kg/112oz Coil material:
Round copper

Former material: Glass fibre

Cone material: Kevlar loaded paper

Surround material: Cloth-sealed

Suspension: Double

Gap depth: 10mm/0.39in Voice
coil winding width: 30mm/1.18in Xmax (3): 10mm/0.39in Thiele parameters-

Small D: 0.38m/14.96in
Fs: 44.2Hz
Mms: 215.15g/7.59oz
Qms: 4.21
Qes: 0.496 Mmd: 185,145g/6.54oz
Qts: 0.444
Re: 5.29ohm
Vas: 113,924
BI: 24.758Tm Cms:
0.063mm/N Rms: 13,653kg/s Le (at 1kHz): 0.96mH Assembly Information Overall diameter: 460mm/18.11in Overall depth: 220.35mm/8.68in Cut-out mounting diameter: 414mm/16.3in mounting diameter Dimensions: 11mm x
7mm/0.43-0.28in Number






















of mounting slots: 8

Mounting PCD range: 441-432mm/17.36-17.01in

Unit weight: 11.6kg/25.5lb

Note

(1) Tested for two hours using a continuous, band-limited pink noise signal as per AES standard. Power calculated on minimum impedance. Loudspeaker tested in free air.

(2) Measured on axis at 1W, 1m in 2pi anechoic environment.

(3) Xmax derived from: (voice coil winding width-gap depth) /2.

To print the product sheet, click here For an overview of the entire Celestion CF Ferrite series, click here To consult and download the original Celestion Pro Audio brochure, click here

"Celestion -

CF1840JD 1000W 8ohm - LF Die Cast Chassis

Loudspeaker - Ferrite 18” Speaker with cast aluminum chassis, ferrite magnet, 4" coil, 1200Watt power, 8ohm impedance

Features

- 18" ferrite magnet, cast chassis LF driver delivering 1200Wrms (AES Standard) power handling and 98dB sensitivity -
4" high temperature, dual layer, Inside/Outside voice coil for higher efficiency, preventing sensitivity loss through thermal compression
- FEA optimized magnet

assembly and suspension deliver highly symmetrical cone movement, leading to exceptionally low harmonic distortion

- Vented magnet assembly increases airflow to provide enhanced cooling -
Twin demodulation rings reduce flux modulation, minimizing electromagnetic distortion


- Double suspension and “multi-roll” surround provide exceptional linearity at extremes of cone excursion

General Specifications

Nominal diameter: 457mm/18in Power rating (1): 1200Wrms Nominal impedance: 8ohm

Sensitivity (2): 98dB
Frequency range: 30-2500Hz
Voice coil diameter: 100mm/4in
Chassis type: Cast aluminium
Magnet type: Ferrite
Magnet weight: 3.18kg/112oz
Coil material: Round copper
Former material: Glass fibre
Cone material: Kevlar loaded paper
Surround material: Cloth-sealed
Suspension: Double
Gap depth: 10mm/0.39in Voice coil winding width: 30mm/1.18in Xmax (3): 10mm/0.39in Thiele-Small D parameters
:

0.38m/14.96in
Fs: 44.2Hz
Mms: 215.15g/7.59oz
Qms: 4.21
Qes: 0.496
Mmd: 185.145g/6.54oz
Qts: 0.444
Re: 5.29ohm
Vas: 113,924
BI: 24.758Tm
Cms: 0.063mm/N Rms: 13,653kg/s Led (at 1kHz): 0.96mH Assembly Information Overall diameter: 460mm/18.11in Overall depth: 220.35mm/8.68in Cut-out diameter: 414mm/16.3in Mounting dimensions: 111KHz mm x
7mm/0.43-0.28in Number of mounting slots: 8

Mounting PCD range: 441-432mm/17.36-17.01in

Unit weight: 11.6kg/25.5lb

Note

(1) Tested for two hours using a continuous, band-limited pink noise signal as per AES standard. Power calculated on minimum impedance. Loudspeaker tested in free air.

(2) Measured on axis at 1W, 1m in 2pi anechoic environment.

(3) Xmax derived from: (voice coil winding width-gap depth) /2.

To print the product sheet, click here For an overview of the entire Celestion CF Ferrite series, click here To consult and download the original Celestion Pro Audio brochure,

click here”