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Bryston 2B.5 CUBED Pro - Analog Amp

Power amplifier operating - 100 watts stereo at 8 ohms, 200 watts at 4 ohms, and 300 watts bridged
MFR# 2B.53-PRO
Bryston 2B.5 CUBED Pro - Analog Amp
No interest if paid in full within 12 months Learn more
Special Order
Note: This item may not be returnable or could require a restocking fee. Contact one of our Audio Consultants for more details. Due to the special nature of this item, we order each unit fresh from the factory, exclusively for you! Lead times may vary so please chat, call or email for up-to-date inventory status.

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

Inputs: 2x Balanced Inputs (XLR or TRS), 2x Single Ended Inputs (RCA)


  • Individual channel trim pots
  • Rack mountable 19" black faceplate (2U)
  • Active extremely low distortion input buffer
  • Balanced and Single Ended audio inputs
  • Selectable gain at 23 dB or 29 dB
  • 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 360 W Channel

Power Capabilities:

  • 135 W into 8Ω
  • 180 W into 4Ω
  • 360 W into 8Ω (Bridged Mono)


  • Harmonic Distortion: ≤.005% from 20 Hz to 20 kHz at 135 W
  • Noise: 115 dB below full output
  • Slew Rate: >60 V/µS
  • Power Bandwidth: .5 Hz to >100 kHz
  • Damping Factor: >500 at 20 Hz (8Ω)
  • Switchable Gain: 23 dB or 29 dB

Additional Information

Condition New
Input Connectors XLR Combo Jack TRS, 1/4 in. TRS, RCA
Output Connectors Binding Post
Amp Wattage 135 W @ 8Ω; 180 W @ 4Ω; 360 W @ 8Ω (bridged Mono)
Impedance 4 or 8 Ohms
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