Bryston 2.5B Cubed Dual-Mono Amplifier

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Bryston 2.5B Cubed Dual-Mono Amplifier


For some, it’s a gateway drug. The 2.5B³ is the least expensive way to get a Cubed Series amplifier, but it’s far from cheap. Made with the same materials and loving care in our Peterborough, Ontario factory as every other product we make, the 2.5B³ will still surprise you with it’s startling dynamics, crystal clarity and 3D enveloping spaciousness. You’ve really got to hear one to appreciate what an incredible deal this model is.



  • Balanced XLR and Single ended RCA input
  • 2 Channels each with fully independent power supplies including transformers
  • 135W into 8 ohms (and up to 180 into 4 ohms) per channel
  • The patented Salomie circuit found in all Cubed Series amplifiers
  • Switchable gain (23dB or 29dB)
  • Fully convection cooled means no noisy fans
  • Machined and anodized aluminum enclosure and dress panel
  • Less than 500mW standby power consumption
  • SoftStart microprocessor controlled startup sequence won’t trip circuit breakers
  • DC trigger for automated turn on and turn off
  • Legendary Bryston 20 Year Warranty


DimensionsInches: 17 or 19 W x 4.5 H x 14.75 D
Weight28 lbs | 13 kg
Frequency Response:<1Hz – 100kHz: -3dB
THD+N (20Hz-20kHz @ Rated Power, 8Ω):<0.005%
Power Output (per channel):135W @ 8Ω | 180W @ 4Ω
Noise:RCA: -<106dB
XLR: <-115dB
Input Impedance:Unbalanced 30kΩ
Balanced 30kΩ+ / 6kΩ-


Additional information

Weight28 lbs

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