18 -sound ND1018BT driver

Beschrijving

Key features

• • 1 inch exit throat
  • 108 dB SPL 1W / 1m average sensitivity
  • 44 mm (1 3/4 inch) voice coil
  • 100 Watt program power handling
  • Titanium diaphragm
  • Neodymium magnet structure
  • Proprietary Phase Plug design

Description

The ND1018BT 1-inch exit high frequency compression driver is designed for high quality two-way systems applications.
Equipped
with proprietary Phase Plug architecture, the ND1018BT compression
driver offers high level manufacturing consistency and smooth coherent
wavefront at horn entrance over all the working frequency range. The
phase plug design with short openings and high flare rate value assures
low distortion and remarkable improvements in mid-high frequency
reproduction.
With its ellipsoidal suspension shape, the ND1018BT
titanium diaphragm assembly exhibits constant slope response from 1kHz
to 18kHz with uniform smooth roll-off behavior.
An edge-wound
aluminum voice coil, wounded on proprietary treated Nomex, completes
diaphragm assembly. Thanks to its physical properties, the proprietary
treated Nomex former shows 30% higher value of tensile elongation at
working operative temperature (200?C) when compared to Kapton.
Moreover, this proprietary former material is suitable to work also in
higher moisture contents environments.
Through careful use of
elementary pieces of neodymium magnets, Eighteen Sound engineers have
developed a powerful neodymium magnet assembly able to reach 18 KGauss
in the gap in compact and lightweight structure.
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.
For
the increase in use of high power audio systems at outdoor events or in
marine environments, the ability to perform properly under inclement
weather conditions is a key-point of the Eighteen Sound philosophy. In
addition, the special treatment applied to the magnet and the top and
back plates of the magnetic structure makes the driver more resistant
to the corrosive effects of salts and oxidization.