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Features

  • • Ultra compact design (OD 109mm - 4.3 in)
  • • 112 dB SPL 1W-1m average sensitivity
  • • 1.4 inch exit throat
  • • 220W maximum program power handling
  • • Natural Sound frequency response extended up to 20 kHz
  • • Next-gen 4-slot metal alloy phase plug
  • • Edge-wound 75mm (3 in) CCAW voice coil
  • • Titanium diaphragm assembly
  • • Neodymium ring magnetic structure
  • • Copper ring for reduced distortion and increased output
  • • Self-centering d-kit for accurate and fast service

The ND3T 1.4 inch exit Natural Sound neodymium high frequency compression driver has been designed for high level sound systems application. The unit has been designed to fulfill tight geometrical requirements, thanks to its ultra compact 109mm overall diameter.

The titanium diaphragm is produced in house and has been developed to assure unmatched transient response. The diaphragm assembly is made by joining the former directly to the titanium dome on its upper bend edge. In comparison with a usual straight former joint, the driver's design assures extended frequency energy transfer for improved response linearity and unparallel reliability. This feature facilitates proper motion control of the dome in real working conditions. A proprietary treated Nomex former is used as 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 higher moisture content environments.

Despite of its compact size, the ND3T neodymium magnet assembly has been designed to obtain 20KGauss in the gap for major benefits in transient response. The motor structure, throughout the precisely coherent metal alloy phase plug with 4 circumferential slots and copper ring on the pole piece, reduces inductance effect and distortion.

The diaphragm kit self centering design allows high precision mounting and at the same time makes very easy the servicing procedure.

The ability to perform properly under inclement weather conditions is a key point of the Eighteen Sound philosophy. Hence, a special treatment is applied to the magnet and the top and back plates of the magnetic structure in order to make the driver more resistant to the corrosive effects of salts and oxidization. This treatment is more effective than any other coating commonly used.

Specifications

Mounting and Shipping Info

  • Throat Diameter36 mm (1.4 in)
  • Nominal Impedance8 Ω
  • Minimum Impedance6.4 Ω
  • Nominal Power Handling1110 W
  • Continuous Power Handling2220 W
  • Sensitivity3112.0 dB
  • Frequency Range0.8 - 20.0 kHz
  • Recommended Crossover41.2 kHz
  • Voice Coil Diameter75 mm (3.0 in)
  • Winding MaterialAluminum
  • Diaphragm MaterialTitanium
  • Flux Density2.0 T
  • Magnet MaterialNeodymium
  • Overall Diameter109 mm (4.29 in)
  • Depth53 mm (2.09 in)
  • Net Weight1.65 kg (3.64 lb)
  • Shipping Box165x150x65 mm (6.50x5.91x2.56 in)
  • 2 hour test made with continuous pink noise signal within the range from the recommended crossover frequency to 20 kHz. Power calculated on rated nominal impedance.
  • Power on Continuous Program is defined as 3 dB greater than the Nominal rating.
  • Applied RMS Voltage is set to 2.83 V for 8 ohms Nominal Impedance.
  • 12 dB/oct. or higher slope high-pass filter.