18 -sound ND 1090 High Frequency Neodymium Driver (8 of 16 ohm

Beschrijving

Key features

• • 110 dB 1W / 1m average sensitivity
  • 1 inch exit throat
  • 44 mm (1 3/4 in) edgewound aluminum voice coil
  • 100 Watt program power handling
  • Titanium dome over PEN suspension
  • Proprietary phase plug design
  • Neodymium ring magnetic structure
  • Excellent thermal exchange

Description

The ND1090 1 inch exit neodymium high frequency compression driver has
been designed for situations where the highest quality is required.
Equipped
with unique Phase Plug architecture, the ND1090 has been designed to
give high level manufacturing consistency and a smooth coherent
wavefront at the horn entrance across the whole working frequency
range. The phase plug short openings and high flare rate value assure
low distortion, showing remarkable improvements in mid-high frequency
reproduction.
The ND1090 diaphragm assembly is composed of a
titanium dome sandwiched to a proprietary treated polyester suspension.
This design maintains low resonance and lowers the minimum crossover
point value to 1.6kHz. An edge-wound aluminum voice coil, wound on
proprietary treated Nomex, completes the diaphragm assembly. 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 high moisture content
environments.
The powerful neodymium magnet assembly has been
designed to obtain 20 KGauss in the gap giving major benefits in
transient response. A copper ring on the pole piece reduces inductance
above 10 kHz, improving phase and impedance linearization. The custom
designed O-ring creates a tight seal between the plate and the cover
assuring air chamber loading. Excellent heat dissipation and thermal
exchange are guaranteed by the direct contact between the magnetic
structure and the aluminum cover which leads to a lower power
compression value.
The ability to perform properly under inclement
weather conditions is a key feature of the Eighteen Sound philosophy.
Hence, in addition, a special treatment has been applied to the magnet
and the top and back plates of the magnetic structure making the ND1090
driver more resistant to the corrosive effects of salts and
oxidization. This treatment is more effective than any other treatment
used by other manufacturers.