Bryston 4B3 / 4B Cubed Dual-Channel Amplifier - 300W/900W Beast

Up for sale is a studio and high fidelity powerhouse. a tank of a unit. something i am very sad to part with: the mighty Bryston 4B3 dual mono amplifier. Some scratches (see pictures) but the tank and the functionality are INTACT and GORGEOUS.

• Brand: Bryston
• Model: 4B3 (4B Cubed)
• Type: Power Amplifier
• Number of Channels: 2 (Bridged Mono Capable)
• Power Output: 300W RMS per channel into 8Ω (500W into 4Ω, 900W Bridged Mono into 8Ω)
• Audio Inputs: Balanced XLR / TRS Combo, Unbalanced Single-Ended RCA
• Audio Outputs: Heavy-Duty Multi-Way Binding Posts
• Color / Faceplate: Silver, 17" wise
• Condition: Used (Fully Tested, Good condition with some scratches (see attached)

Description

Up for sale is a meticulously maintained Bryston 4B3 (4B Cubed) Dual-Mono Stereo Power Amplifier finished in classic Silver 17" faceplate

The 4B series is an industry legend, and the Cubed (4B3) generation represents Bryston's definitive refinement of the platform. Featuring the patented Salomie input buffer circuitry developed with Dr. Alexandru Salomie, the 4B3 drops noise and distortion to virtually unmeasurable levels while delivering effortless, iron-fisted control over demanding speaker loads.

Key Performance & Features

• Active Low-Distortion Input Stage: Patented input circuitry vastly reduces common-mode noise and distortion.
• Dual-Mono Architecture: Completely independent power supplies and toroidal transformers per channel eliminate crosstalk and deliver massive dynamic headroom.
• Selectable Gain: 23dB or 29dB gain switch to dial in the ideal noise floor and synergy with active preamps, tube stages, or direct-DAC setups.
• Bridgeable: Run as a 300W/channel stereo powerhouse or bridge to a single 900W mono block.
• Convection Cooled: Oversized custom heatsinks allow completely silent, fanless operation.