Product Description

The Audion™ 4 amplifier is a 4-channel amplifier with expansion. It has 4 independent controls for compression ratio, compression threshold, expansion threshold, MPO (Maximum Power Output), and compression time constants. It features standard compression adjustment.


  • Four-channel Wide-Dynamic-Range Compression with Dynamic Contrast  Detection™
  • Patented Adaptive Feedback Cancelling
  • Layered Noise Reduction™
  • Expansion – gain reduction for low-level sound
  • Output Limiting – Wide band output limiting (MPO) with adjustable thresholds

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