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Bryston 7B³ Monoblock Amplifier

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7B³ mono amplifiers are truly special. Though they don't look much different, they're a big step up from the venerable 4B³. The power supply for this amplifier is built around a specially wound transformer that is substantially more efficient than normal. With twice the power available, they can drive all but the most brutal loads to lifelike levels. But even at whisper-quiet levels, they reveal detail and nuance in your recordings that you never knew existed until now.


  • Balanced XLR and Single-ended RCA input
  • Dual binding post pairs
  • 600W into 8 ohms (and up to 900 into 4 ohms)
  • 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


  • Silver or black faceplate
  • 17” or 19” faceplate (non-rack mountable) 19" comes with front-mounted handles



Dimensions- Inches: 17 or 19 W x 5.8 H x 15.5 or 17.8 (with front handles) D

Weight- 53 lbs | 24 kg

Frequency Response- <1Hz - 100kHz: -3dB

THD+N (20Hz-20kHz @ 600W, 8)- <0.005%

Power Output- 600W @ 8Ω | 900W @ 4Ω

Noise- RCA: -117dB

XLR: -119dB

Input Impendace- Unbalanced 7.5kΩ

Balanced 5kΩ/leg