Automated speaker calibration is a choice on lots of receivers which makes it much easier to calibrate the speakers. The receiver sends test sounds to each speaker and subwoofer, and monitors the seem having a microphone. EQ CONTROLS: The Specialist compact rack mount residence theater procedure receiver options electronic Liquid https://4zoneamplifier95936.ageeksblog.com/33227704/4-zone-amplifier-things-to-know-before-you-buy