3B Cubed Amplifier

Way back in 1973, a young engineer named Chris Russell took his new prototype amplifier, the PRO 3, to an A list studio in Toronto for an audition. He left with an order for two. Nearly five decades later, that amp has evolved into the Bryston 3B Cubed. It's twice as powerful as the original and ten times as impressive. Though it's one of our smaller amplifiers, it features all the same technology found in our venerable 4B. One big advantage, however, is the shallow depth. The 3B Cubed is a great all around amp, but is especially useful for shallow mounting depth applications.

The Bryston 3B³ is dual-channel (stereo) amplifier designed for a wide range of medium to high power audio/video systems. It serves up medium to high amounts of power without sacrificing sonic accuracy and long-term reliability.

Features

• Active extremely low distortion input buffer
• Balanced and Single Ended audio 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 400W Channel
• Harmonic Distortion: ≥.005% from 20Hz to 20kHz at 200W
• Noise below full output: -110dB single ended, -113dB balanced
• Slew Rate: >60V/μS
• Power Bandwidth: .5Hz to >100kHz
• Damping Factor: >500 at 20Hz (8Ω)
• Switchable Gain: 23dB or 29dB

Press and Reviews

Bryston Magazine

Guides & Advice
by Moon Audio

FairAudio

by Jochen Reinecke
Oct. 2019

Hifi Advice

by Christiaan Punter
Dec. 2017