Features
  • 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:

15100004
ND840
16ohm

15129052
ND840
8ohm

Specifications
General specifications
Exit Throat Diameter
1.4 inch / 36 mm
Related Impedance
8 ohm
Program Power (watt)
220 W
Power handling capacity
110 W
Sensitivity
109 dB
Frequency range
500 - 20000 Hz
Suspension Design
Double Roll
Minimum Impedance (ohm)
7.00 ohm
Voice Coil Diameter
3.0 inch / 76 mm
Voice Coil Former Design
Direct Drive Kapton
Number of layers
1
Kind of layers
inside/outside
Flux Density
2.0 T
Phase Plug Design
3 slot
Thiele - small parameters
Bl factor (Bl) (T x m)
12.30 T x m
Mounting information
Overall diameter
115 mm / 4.53 inches
Overall height
46 mm / 1.81 inches
Mounting
4 x 6 mm threaded holes at 90°
Size
Weight
1.4 kg / 3.09 lbs
Shipping information
Package Height
63 mm / 2.48 inches
Package Width
142 mm / 5.59 inches
Package Depth
144 mm / 5.67 inches
Package Weight
1.7 kg / 3.75 lbs
Downloads
SPECIFICATIONS
PDF
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19-02-2024
DRAWINGS
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