This series from Yamaha has features found only on Professional series amps designed for PA or installation use.

These are well engineered, underrated and overbuilt amplifiers that have a great sound.   They have been sought after by many audiophiles.   

• Balanced inputs
• Front Panel, Calibrated level controls
• Dual Banana jack outputs
• Rack mount ears and handles
• Low distortion
• Excellent phase response
• Thermally protected outputs
• Bridged Mono Mode
• All discrete circuitry