Eighteensound ND1020 Neo High Frequency Treiber Lautsprecher

108,5 dB SPL 1W / 1m average sensitivity 1 inch exit throat34,4 mm (1 1/3 inch) voice coil diameterPolyethylene Diaphragm60W Program Power HandlingCompact Lightweight NeodymiumStructure Proprietary Phase Plug design
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.

Throat Diameter	25,4 mm (1 in)
Rated Impedance	8 Ohm
DC Resistance	5,8 Ohm
Minimum Impedance	6,5 Ohm at 5000Hz
Le (at 1kHz)	54 µH
AES Power	30 W above 2 kHz
Program Power	60 W above 2 kHz
Sensitivity	108,5 dB
Frequency Range	1600Hz ÷ 20kHz
Recomm. Xover Frequency	1600 Hz 12dB/oct slope
Minimum Impedance	6,5 Ohm at 5000Hz
Diaphragm Material	Treated polyethylene
Voice Coil Diameter	34,4 mm (1 1/3 in)
Voice Coil Winding Material	Edge-wound aluminum

Thiele Small Parameters

Magnet Material	Neodymium
Flux Density	1,8 T
BL Factor	6 N/A
Polarity	Positive voltage on red terminal gives positive pressure in the throat

Mounting information

Overall diameter	85 mm (3,3 in)
N. of mounting holes and bolt	2 M5 holes on Ø 76 mm (3 in)
Bolt circle diameter	58 mm (2,3 in)
Total depth	40,5 mm (1,6 in)
Net weight	0,7 Kg (1,54 lb)
Shipping weight	0,75 Kg (1,65 lb)
CardBoard Packaging dimensions	97x97x58 mm (3,8x3,8x2,3 in)