2.5B SST3

The Bryston 2.5B3³ is a compact, high quality, dual-channel (stereo) amplifier intended for use in home sound systems requiring a musically accurate, extremely reliable, no compromise power source.


20 year warranty

Finance example

£790.00 initial 20% deposit then £175.56 per month for 18 months. Other finance terms available. Finance subject to status

2.5B SST3



  • Active extremely low distortion input buffer
  • Balanced and unbalanced inputs
  • Selectable gain at 23 or 29dB
  • Regulated power supplies to all voltage gain stages
  • Independent power supplies for each channel
  • Convection cooled and housed in a fully aluminum chassis
  • No fans or other moving parts
  • Bridging switch configures amplifier into a single 360W Channel


  • Available with silver or black faceplate (2U + .55”)
  • 17” or 19” faceplate available (non-rack mountable)
  • Rack mountable Pro Edition available in black

Tech spec

Power capabilities

135W into 8Ω (180W into 4Ω)

360W into 8Ω (Bridged Mono)

Harmonic distortion

< .005% from 20Hz – 20kHz at 135W

IM distortion

< .005% from 10mW – 135W


108dB below full output

Slewing rate

< 60V/µS

Power bandwidth

.5Hz – > 100kHz

Damping factor

> 500 at 20Hz (8Ω)

Sensitivity & Impedance

1V in = 100W 50k

For more information click here to visit the Bryston website


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