Continuous power handling
Voice coil diameter
Diaphragm material
Throat diameter

The DE990TN is a uniquely compact 86mm (3.4 in) voice coil, neodymium high frequency driver. The compact 118mm diameter was achieved using a specially milled inside ring neodymium magnet. The diaphragm used in the DE990TN has been completely redesigned to incorporate a bent edge voice coil former, new dome and surround geometry and an optimized phase plug. These modifications combine to better control diaphragm displacement and deformations, resulting in lower distortion and a smoother higher frequency response above 10kHz. 



  • 200 W continuous program power capacity
  • 1.4" horn throat diameter
  • 86 mm (3.4 in) aluminium voice coil
  • Titanium diaphragm
  • 500 - 18000 Hz response
  • 108.5 dB sensitivity
  • Neodymium magnet assembly with shorting copper cap


  • Throat Diameter36 mm (1.4 in)
  • Nominal Impedance16 Ω
  • Minimum Impedance11.5 Ω
  • Nominal Power Handling2100 W
  • Continuous power handling3200 W
  • Sensitivity (1W/1m)4108.5 dB
  • Frequency Range0.5 - 18.0 kHz
  • Recommended Crossover51.0 kHz
  • Voice Coil Diameter86 mm (3.4 in)
  • Winding MaterialAluminium
  • Inductance0.1 mH
  • Diaphragm MaterialTitanium
  • Flux Density1.9 T
  • Magnet MaterialNeo Inside Ring

Mounting and Shipping Info

  • Four M6 holes 90° on 102 mm (4 in) diameter
  • Overall Diameter118 mm (4.65 in)
  • Depth63 mm (2.48 in)
  • Net Weight2.0 kg (4.41 lb)
  • Shipping Units1
  • Shipping Weight2.04 kg (4.5 lb)
  • Shipping Box120x120x65 mm (4.72x4.72x2.56 in)
  • Other Details4x M6 Mounting Studs with bolts and washers included

Service Kit

  • Driver mounted on B&C ME90 horn.
  • 2 hour test made with continuous pink noise signal within the range from the recommended crossover frequency to 20 kHz. Power calculated on rated minimum impedance.
  • Power on Continuous Program is defined as 3 dB greater than the Nominal rating.
  • Applied RMS Voltage is set to 4 V for 16 ohms Nominal Impedance.
  • 12 dB/oct. or higher slope high-pass filter.