Bryston 21B3

21B3 MSRP $13,795 Contact Us

The 21B3 is a three-channel amplifier equivalent to a 4B Cubed stereo amplifier combined with a 7B Cubed mono amplifier within a single chassis. Designed for use with the Bryston active speaker system, but also suitable for standlone amplification use with any speakers.

Available with 17" or 19" (with handles) silver or black faceplates.


  • Active low distortion input buffer
  • Balanced and single-ended inputs
  • Selectable 23dB or 29dB gain
  • Regulated power supplies for all gain stages
  • Independent power supplies for each channel
  • Convection cooled; no fans or moving parts