CF1840H
18-inch, cast aluminium chassis, ferrite magnet LF driver
- Rigid lightweight carbon fibre loaded cone
- Balanced airflow venting provides enhanced cooling
- Twin demodulation rings
- Low mass coil reinforcement
Specifications
2000W
Continuous power rating
97dB
Sensitivity
4in
Voice coil diameter
Nominal diameter
457mm / 18in
Power rating
1000W
Continuous power rating
2000W
Rated impedance
4Ω
Sensitivity
97dB
Frequency range
30-2500Hz
Chassis type
Cast aluminium
Magnet type
Ferrite
Magnet weight
3.18kg / 112oz
Voice coil diameter
100mm / 4in
Voice coil material
Round copper
Former material
Glass fibre
Cone material
Carbon fibre loaded paper
Suspension
Single
Gap height (Hg)
9.5mm / 0.37in
VC winding height (Hvc)
25mm / 0.99in
Parameters
Sd
1134.12cm2 / 175.79in2
Fs
38.50Hz
Mms
158.70g / 5.60oz
Qms
3.921
Qes
0.385
Qts
0.351
Re
3.04Ω
Vas
196.7l / 6.95ft3
BI
17.41Tm
Cms
0.11mm/N
Rms
9.76kg/s
Le (at 1kHz)
0.95mH
Xmax
8mm / 0.31in
Mounting Information
Overall diameter
460mm / 18.11in
Overall depth
220mm / 8.7in
Cut-out diameter
414mm / 16.24in
Mounting hole dimensions
11x7mm / 0.43x0.28in
Number of mounting holes
8
Mounting hole PCD
441-432mm / 17.36-17.01in
Unit weight
11.6kg / 25.5lb
Packed Dimensions & Weight
Single pack size W x D x H
500mm x 500mm x 255mm / 19.7in x 19.7in x 11in
Single pack weight
13kg / 28.6lb
Frequency Response and Impedance Curves
Topmost curve: Frequency response on axis | Secondary curve: Frequency response at 45° off axis
Power rating: 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.
Continuous power rating: Defined as 3dB greater than the AES rating.
Sensitivity: Measured on axis at 1W, 1m in 2π anechoic environment.
Parameters: Measured after unit subjected to pre-conditioning signal.
Xmax: Hvc-Hg/2
