18 -sound ND1424BT HF Neodymium Driver (16ohm)

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Key features

    • 109 dB 1W / 1m average sensitivity
    • 1,4 inch exit throat
    • 2,4 inch edgewound aluminum voice coil
    • 140 W program power handling
    • Pure Titanium diaphragm assembly
    • Proprietary phase plug design
    • Excellent thermal exchange
    • Neodymium magnetic structure


The ND1424BT 1.4? exit neodymium high frequency compression driver has
been designed for high level sound systems application.
titanium diaphragm is produced in house and has been developed to
assure unmatched transient response. A proprietary treated Nomex bended
former edge-wound aluminum 60mm voice coil completes diaphragm
assembly. It has been made joining the proprietary treated Nomex former
directly to the titanium dome through its upper bend edge. In
comparison with usual straight former joint, the driver design assures
extended frequency energy transfer for improved response linearity and
unparallel reliability. This feature allows to keep proper motion
control of the dome in real working conditions. 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 material is suitable to work also in
higher moisture contents environments.
Equipped with Proprietary
Phase Plug 3P architecture, the ND1424BT has been designed to give
smooth coherent wavefront in the horn entrance in all working frequency
range and high level manufacturing consistency. The phase plug with its
short openings and high flare rate value assures low distortion and
remarkable improvements in mid-high frequency reproduction.
big innovation in ND1424BT consists in the magnetic complex
architecture. Through careful use of elementary pieces of neodymium
magnets, Eighteen Sound engineers have developed a powerful neodymium
magnet assembly able to reach 19KGauss in the gap in compact and
lightweight structure. The motor structure, throughout the precisely
coherent phase plug with 3 circumferential slots and copper ring on the
pole piece, reduces inductance effects and distortion.
The custom designed O-ring creates a tight seal between the plate and the cover assuring air chamber loading.
heat dissipation and thermal exchange are guaranteed by the direct
contact between the magnetic structure and the aluminum cover that
allows to obtain a lower power compression value.

Throat Diameter 35,5 mm (1,4 in)
Rated Impedance 16 ohm
DC Resistance 14 ohm
Minimum Impedance 16 ohm at 3000 Hz
AES power (1) 70 W above 1,2 kHz
Program power (2) 140 W above 1,2 kHz
Sensitivity (1W@1m) (3) 109 dB
Frequency Range 800 Hz ? 20 kHz
Recomm. Xover Frequency above 1200 Hz (12 dB/octave)
Diaphragm Material Titanium
Voice Coil Diameter 60 mm (2,4 in)
Voice Coil Winding Material Edge-wound aluminum
Magnet Material Neodymium
Flux Density 1,9 T
BL Factor 10,5 N/A
Polarity Positive voltage on red terminal gives positive pressure in the throat


Overall diameter 116,6 mm (4,59 in)
Mounting holes diameter 4 M6 holes 90? at ?102 mm (4 in)
Bolt circle diameter 102mm (4 in)
Total depth 54,5 mm (2,15 in)
Net weight 1,7 Kg (3,70 lb)
Shipping weight 1,9 Kg (4,20 lb)
CardBoard Packaging dimensions 132x132x68 mm (5,2×5,2×2,7 in)

Extra informatie

Gewicht 3.00 kg



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