ND3ST

ND3ST
Natural Sound Neodymium Compression Driver

Key Features

1.4 inch exit Neodymium compression driver

Very fast impulse response for excellent transient reproduction

Natural Sound frequency response extended up to 20 kHz

240 W program power handling

112 dB 1W / 1mt sensitivity

75 mm (3 in) Edgewound CCAW voice coil

Titanium diaphragm with proprietary suspension geometry

Next gen 4-slot metal alloy phase plug design

Copper sleeve for reduced distortion and increased high end output

Datasheet Back

Description


The ND3ST 1.4 inch exit Natural Sound neodymium high frequency compression driver has been designed to fulfill state of the art performances needed for present and future very high quality sound reinforcement applications.

The next-gen titanium diaphragm is produced in house and has been developed to assure unmatched transient response. The diaphragm assembly is made by joining the former directly to the titanium dome on its upper bend edge. In comparison with a usual straight former joint, the driver's design assures extended frequency energy transfer for improved response linearity and unparallel reliability. This feature facilitates proper motion control of the dome in real working conditions. A proprietary treated Nomex former is used as Nomex shows a 30% higher value of tensile elongation at a working operative temperature (200°C) when compared to Kapton. Moreover, this proprietary former material is also suitable for use in higher moisture content environments.

The ND3ST neodymium magnet assembly has been designed to obtain 21KGauss in the gap for major benefits in transient response. The motor structure, throughout the precisely coherent proprietary designed metal alloy phase plug with 4 circumferential slots and copper ring on the pole piece, reduces inductance effect and distortion.

The diaphragm kit self-centering design allows high precision mounting and at the same time makes very easy the servicing procedure.

The ability to perform properly under inclement weather conditions is a key point of the Eighteen Sound philosophy. Hence, a special treatment is applied to the magnet and the top and back plates of the magnetic structure in order to make the driver more resistant to the corrosive effects of salts and oxidization. This treatment is more effective than any other coating commonly used.



General Specifications HF

Throat Diameter 36 mm (1.4in)
Rated Impedance 8 Ohm
D.C. Resistance 4.5 Ohm
Minimum Impedance 6.4 Ohm @ 6500 Hz
Continuous Power 120 W
Program power (8) 240 W
Sensitivity (9) 112 dB
Frequency Range 800 ÷ 20000 Hz
Min. Xover Frequency 1000 Hz
Recomm. Xover Frequency 1200 Hz (24 dB/Oct High-Pass Filter)
Diaphragm material Pure Titanium
Voice Coil Diameter 75 mm (3 In)
Voice Coil winding material Edgewound CCAW
Magnet material Neodymium
Flux Density 2.1 T
Polarity Positive voltage on red terminal gives positive pressure in the throat

Mounting information

Overall diameter 120 mm (4.7 in)
N. of mounting holes and bolt 4 M6 holes 90° at Ø102 mm (4 in)
Mounting holes diameter 102 mm (4 in)
Bolt circle diameter 102 mm (4 in)
Total depth 53 mm (2.1 In)
Net weight 2.3 Kg (5.07 lb)
Packaging Dimensions 165x150x65mm (6.5x5.91x2.56 in)

Models

Model Code Info

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