ND840
DRIVER
  • 3-inch Diaphragm, 1.4-inch Exit Throat / Pure Titanium Compression Driver
  • 220W continuous program power handling
  • Frequency range: 500Hz - 20kHz
  • 3-slot optimized geometry phase plug
  • 3-inch Diaphragm, 1.4-inch Exit Throat / Pure Titanium Compression Driver
  • 220W continuous program power handling
  • Frequency range: 500Hz - 20kHz
  • 3-slot optimized geometry phase plug
  • Titanium diaphragm
  • Copper inductance ring for extended response
  • Vented, damped, low distortion suspension system
  • Nedymium magnet assembly
The ND840 is a high performance 3-inch diaphragm compression driver with a 1.4 inch exit throat featuring the smallest size of the art technology.
The diaphragm are precision completely formed from pure titanium. Voice coil assembly is designed using high temperature kapton former and it is joined to the diaphragm by RCF proprietary Direct Drive kapton technology. Diaphragm suspension is designed by extensive FEM study for low distortion and low frequency range extension.

Part Number:

  • 15129052
    ND840
    8ohm
Specifications
General specifications
Diaphragm Material:
Pure Titanium
Exit Throat Diameter:
1.4 inch / 36 mm
Flux Density:
1 T
Frequency range:
500 - 20000 Hz
Kind of layers:
inside/outside
Magnetics:
Neodymium
Minimim Impedance:
7.00 ohm
Number of layers:
1
Phase Plug Design:
3 slot
Phase Plug Material:
Aluminium
Power handling capacity:
110 W
Program Power:
220 W
Related Impedance:
8 ohm
Sensitivity:
109 dB
Suspension Design:
Double Roll
Suspension Material:
Pure Titanium
Voice Coil Demodulation Ring:
Copper
Voice Coil Diameter:
3.0 inch / 76 mm
Voice Coil Former Design:
Direct Drive Kapton
Voice Coil Material:
Edgewound Aluminium
Mounting Information
Mounting:
4 x 6 mm threaded holes at 90°
Overall diameter:
115 mm / 4.53 inches
Overall height:
46 mm / 1.81 inches
Shipping informations
Package Depth:
155 mm / 6.1 inches
Package Height:
85 mm / 3.35 inches
Package Weight:
1.7 kg / 3.75 lbs
Package Width:
160 mm / 6.3 inches
Size
Weight:
1.4 kg / 3.09 lbs
Standard compliance
CE marking:
Yes
Thiele - small parameters
BL factor (BL):
12.30 T x m
.