The Bryston 3B³ is dual-channel (stereo) amplifier designed for a wide range of audio/video systems which call for medium to high amounts of power, but wish to avoid 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 Specifications: 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 Options: Available with silver or black faceplate (3U + .55”) 17” (without handles) or 19” (with handles) faceplate available (non-rack mountable)POWER CAPABILITIES: 200W into 8Ω 300W into 4Ω 400W into 8Ω (Bridged Mono)