CF1840JD
LF Cast Chassis / Ferrite
Coaxial/Twin Cone
- TF1218TC
- TF1225CX
Compact Array
- AN2075
- AN2775
- AN3510
Compression Drivers / Ferrite
- CDX1-1010
- CDX1-1440
- CDX1-1445
- CDX1-1446
- CDX1-1745
- CDX1-1746
- CDX1-1747
- CDX14-3060
- CDX20-3075
Compression Drivers / Neo
- CDX1-1415
- CDX1-1425
- CDX1-1430
- CDX1-1720
- CDX1-1730
- CDX1-1731
- CDX14-2420
- CDX14-3050
- CDX20-3000
Horns
- H1-7050 'NoBell'
- H1-9040P
LF Cast Chassis / Ferrite
- CF18VJD
- CF1830E
- CF1840JD
- FTR08-2011D
- FTR12-3070C
- FTR12-4080HDX
- FTR15-3070C
- FTR15-3070E
- FTR15-4080HD
- FTR15-4080HDX
- FTR15-4080F
- FTR15-4080FD
- FTR18-4080F
- FTR18-4080FDX
- FTR18-4080HDX
- FTR18-4080FD
LF Cast Chassis / Neo
- NTR06-1705D
- NTR08-2009D
- NTR08-2011D
- NTR10-2016D
- NTR10-2520D
- NTR10-2520E
- NTR12-3018D
- NTR15-3018E
- NTR21-5010JD
LF Pressed Chassis / Ferrite
- TF0510
- TF0615
- TF0818
- TF1015
- TF1018
- TF1020
- TF1215
- TF1218
- TF1220
- TF1225e
- TF1225
- TF1230
- TF1230SL
- TF1520
- TF1525
- TF1525e
- TF1530SL
- TF1530
- TF1530e
- K12H-100TC
- K12H-200TC
LF Pressed Chassis / Neo
- TN0820
- TN1020
- TN1225
- TN1230
- TN1525
- TN1530
Midrange
- TF0410MR
- TF0510MR
- TF0615MR
- TF0818MR
- NTR06-1705B
- 18" ferrite magnet, cast aluminium chassis LF driver delivering 1000Wrms (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
8Ω Frequency Response
- 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.
- Measured on axis at 1W, 1m in 2π anechoic environment.
- Xmax derived from: (voice coil winding width-gap depth)/2.
General Specifications
Nominal diameter
457mm/18in
Power rating1
1000Wrms
Nominal impedance
8Ω
Sensitivity2
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
Xmax3
10mm/0.39in
Gap depth
10mm/0.39in
Voice coil winding width
30mm/1.18in
Small Signal Parameters
D
0.38m/14.96in
Fs
44.2Hz
Mms
215.15g/7.59oz
Mmd
185.145g/6.54oz
Qms
4.21
Qes
0.496
Qts
0.444
Re
5.29Ω
Vas
113.924
BI
24.758Tm
Cms
0.063mm/N
Rms
13.653kg/s
Le (at 1kHz)
0.96mH
Mounting Information
Diameter
460mm/18.11in
Overall depth
220.35mm/8.68in
Cut-out diameter
412.6mm/16.24in
Mounting slot 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
