Data Sheet

ND1020
Neo High Frequency Driver
Key Features
108,5 dB SPL 1W / 1m average sensitivity
1 inch exit throat
34,4 mm (1 1/3 inch) voice coil diameter
Polyethylene Diaphragm
60W Program Power Handling
Compact Lightweight Neodymium Structure
Proprietary Phase Plug design
General Description
The ND1020 1-inch exit high frequency compression driver has been
designed for use in situations where the highest possible sound
quality is required.
Polyethylene Naphthalate (PEN) has been used for the diaphragm
assembly, giving to ND1020 a superior diaphragm dimensional
stability compared to conventional Mylar film (160°C as a thermal
rating compared to 105°C for PET) and maintaining a constant
performance during its whole working life. PEN film, with its very
high value of elasticity modulus (6000MPa compared to 4000MPa
for PET and 2800MPa for polyimide film), is capable of a superior
transient and intermodulation distortion response. The flat punched
suspension shape has been designed to maintain low stiffness for
superior low mid band distortion and response.
An edge-wound copper clad aluminum voice coil wound on treated
Nomex completes the diaphragm assembly. Nomex shows a 20%
higher value of tensile elongation at 200°C than the value at room
temperature, (in comparison, Kapton tensile elongation is 30% lower
at 200°C than the value at room temperature). Hence, Nomex is
capable of keeping energy transfer from the voice coil to the dome
under control, especially when the voice coil reaches high
temperatures. As a plus, treated Nomex former voice coil can work
well even in high moisture content environments, thanks to its very
low porosity.
The ND1020 is equipped with unique Phase Plug architecture,
designed to give smooth coherent wave front at the horn entrance
over the whole working frequency range, as well as high level
manufacturing consistency. The phase plug design shows short
openings and high flare rate value, assuring low distortion and
demonstrates remarkable improvements in mid-high frequency
reproduction.
By carefully using elementary pieces of neodymium magnets,
Eighteen Sound engineers have developed a powerful neodymium
magnet assembly capable of reaching 18KGauss in the gap within a
compact and lightweight structure.
0421P8M800 8Ohm
0421P6M800 16 Ohm
0421P4M800 4 Ohm
NEODYMIUM HF DRIVERS
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