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- 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
DescriptionThe 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.
Throat Diameter 25,4 mm (1 in) Rated Impedance 8 Ohm DC Resistance 5,3 Ohm Minimum Impedance 7 Ohm at 4000Hz Le (at 1kHz) 120 µH AES Power 50 W above 1,6 kHz Program Power 100 W above 1,6 kHz Sensitivity 110 dB Frequency Range 1600Hz ÷ 20kHz Recomm. Xover Frequency 1600Hz (12dB/oct slope) Diaphragm Material Titanium - PEN Voice Coil Diameter 44,4 mm (1 3/4 in) Voice Coil Winding Material Edge-wound aluminum Magnet Material Neodymium Flux Density 2 T BL Factor 9,1 N/A Polarity Positive voltage on "+" terminal gives positive pressure in the throat
Overall diameter 93 mm (3,7 in) N. of mounting holes and bolt 4 M6 holes 90° at Ø 76 mm (3 in) Bolt circle diameter 76 mm (3 in) Total depth 53 mm (2,1 in) Net weight 1,2 Kg (2,6 lb) Shipping weight 1,3 Kg (2,9 lb) CardBoard Packaging dimensions 97x97x58 mm (3,8x3,8x2,3 in)
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