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Trident Audio S20 Dual Microphone Preamp - Used  From Trident

Dual-channel mic preamp w/ variable high-pass filter


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Trident Audio Developments

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Manufacturer's Description from Trident

The Trident S20 Dual Mic Preamp has an input selector that switches between mic and line or 2 mics, a great feature for instantly comparing which mic is really the best for a particular job. Switch reverses the phase of the input signal. 48V phantom power for condenser mics. Gain swing ranges from a true unity to +60dB without any pad. Variable-sweep, low-cut filter controls lows from 5Hz-200Hz that can muddy a mike. It removes stage and floor rumble, takes out subsonic interference, and improves the HF performance of the signal by the elimination of LF intermodulation distortions.

Trident Audio Developments


  • Input selector switches between mic and line or 2 mics
  • Phase reverse the input signal with one switch
  • +48V phantom power for condenser mikes
  • Gain swing of the pre is from true unity to +60dB without any pad
  • After the pre, the variable sweep low-cut filter controls lows that can muddy a mike easily
  • From 5Hz to 200Hz, remove stage or floor rumble, take out sub-sonic interference, and improve HF performance of the signal by elimination of LF