Bryston 4B3 (O Bryston Silver Version 19 inch )

Inputs
Inputs: 2x Balanced Inputs (XLR or TRS), 2x Single Ended Inputs (RCA)
Power Capabilities
300W into 8Ω
500W into 4Ω
900W into 8Ω (Bridged Mono)
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 900W Channel