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Fountek FR89EX Full Range

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The Fountek FR89EX is an 88mm full range drive unit. This long throw design has an impressive maximum linear excursion of +/- 5mm.

Features include a black aluminium cone, high flux neodymium magnet system, non resonant chassis and an underhung copper ribbon voice coil. This small drive unit has a smooth, extended frequency range with excellent transients and low distortion.

Available in 4 and 8 ohms impedance.

Key Features:

  • Aluminium cone - excellent transients
  • Non resonant chassis
  • 25mm copper ribbon voicecoil
  • High compliance rubber suspension
  • Kapton voice coil former
  • Smooth frequency response
  • Neodymium magnet system
  • Underhung, long throw design

Basic parameters:

Resonant frequency (fs) 97 Hz Nominal impedance (Zn) 4 / 8 Ω
Mechanical  Q factor (Qms) 4.88 DC resistance (Re) 3.2 / 5.8 Ω
Electrical Q factor (Qes) 0.57 RMS power handling 15 W
Total Q factor (Qts) 0.51 Sensitivity (2.83V/1m) 85.3dB
Equivalent volume (Vas) 1.4L Chassis diameter 88.4 mm

Here's the full datasheet:

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