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RCF ND640 Compression Driver Titanium Diaphragm | 8 Ohm | Industrial Packaging

RCF ND640 Compression Driver Titanium Diaphragm | 8 Ohm | Industrial Packaging

SoundPro Item: 113842 | Part Number: ND640

Regular price $319.00
Regular price $459.00 Sale price $319.00
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MSRP: $459.00 | MAP: $319.00

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  • Pure Titanium Diaphragm And Suspension For Lightweight High-Output HF Performance
  • Direct Drive Kapton Voice Coil Former Eliminates Mechanical Loss Between Coil And Diaphragm
  • Copper Inductance Demodulation Ring Extends Upper Frequency Linearity
  • FEM-Optimized Double-Roll Suspension Reduces Distortion At The Low End Of The Passband
  • 3-Slot Aluminum Phase Plug Controls Phase Coherence Across The Passband
  • Neodymium Magnet Assembly Delivers High Flux Density In A Compact Form Factor
  • CE Compliant Construction Meets European Safety Standards For Professional Audio Equipment

The RCF ND640 is engineered for professional loudspeaker system designers, OEM integrators, and touring sound companies that need a high-performance compression driver capable of surviving the demands of continuous high-SPL operation. With a 2.5-inch pure titanium diaphragm, neodymium magnet assembly, and RCF's proprietary Direct Drive Kapton voice coil technology, the ND640 is built for applications where clarity, reliability, and controlled dispersion across the full high-frequency range are non-negotiable. It suits line array elements, stage monitor horns, installed SR systems, and speaker repair or replacement scenarios where a premium HF component is specified.

What sets the ND640 apart from alternatives at this exit size is the combination of FEM-optimized suspension geometry, a copper inductance demodulation ring for extended upper-frequency linearity, and a 3-slot phase plug in aluminum construction that controls phase coherence across the passband. The vented, damped double-roll titanium suspension controls breakup modes that limit lower-quality drivers, allowing the ND640 to reach further into the upper midrange without the distortion penalties typically associated with compact compression drivers. For engineers specifying components for high-demand live sound or fixed installation builds, this driver offers a measurable engineering advantage over ferrite-based or mylar-diaphragm alternatives in its class.

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Specifications

Certifications
Safety Compliance
CE Compliant
Performance
Sensitivity
110 dB
Frequency Range
700 - 20000 Hz
Flux Density
1.9 T
Bl Factor
9.80 T x m
Electrical
Nominal Impedance
8 ohm
Minimum Impedance
7.50 ohm
RMS Power Handling
90 W
Program Power Handling
180 W
Construction
Diaphragm Material
Pure Titanium
Suspension Material
Pure Titanium
Suspension Design
Double Roll
Voice Coil Diameter
2.5" / 63 mm
Voice Coil Winding Material
Edgewound Aluminum
Voice Coil Former Design
Direct Drive Kapton
Voice Coil Layers
1
Layer Type
Outside
Voice Coil Demodulation Ring
Copper
Phase Plug Design
3 Slot
Phase Plug Material
Aluminum
Magnetics
Neodymium
Exit Throat Diameter
1.4" / 36 mm
Dimensions
Overall Diameter
4.02" / 102 mm
Overall Height
1.57" / 40 mm
Mounting
4 x 6 mm threaded holes at 90 degrees
Weight
Product Weight
2.34 lbs / 1.06 kg
Shipping
Package Height
2.91" / 74 mm
Package Width
4.80" / 122 mm
Package Depth
4.84" / 123 mm
Package Weight
2.58 lbs / 1.17 kg

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