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  • 1.4 inch exit Neodymium compression driver
  • Very fast impulse response for excellent transient reproduction
  • Natural Sound frequency response extended up to 20 kHz
  • 240 W program power handling
  • 112 dB 1W / 1mt sensitivity
  • 75 mm (3 in) Edgewound CCAW voice coil
  • Titanium diaphragm with proprietary suspension geometry
  • Next gen 4-slot metal alloy phase plug design
  • Copper sleeve for reduced distortion and increased high end output
  • 16 Ohm version available

The ND3ST 1.4 inch exit Natural Sound neodymium high frequency compression driver has been designed to fulfill state of the art performances needed for present and future very high quality sound reinforcement applications.

The next-gen 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.

The ND3ST neodymium magnet assembly has been designed to obtain 21KGauss in the gap for major benefits in transient response. The motor structure, throughout the precisely coherent proprietary designed 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.


Mounting and Shipping Info

  • Throat Diameter36 mm (1.4 in)
  • Nominal Impedance8 Ω
  • Minimum Impedance6.4 Ω
  • Nominal Power Handling1120 W
  • Continuous Power Handling2240 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 Density2.1 T
  • Magnet MaterialNeodymium
  • Overall Diameter120 mm (4.72 in)
  • Depth53 mm (2.09 in)
  • Net Weight2.3 kg (5.07 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.
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  • Eighteen Sound P.IVA/VAT IT02577810357