Very very good even few hours operate .... but after 100 hrs or more sound will be a lot better for sure . In case who's has experience with M1.1 ,the 10 series are far better in all aspect .
Base on Physics once the platter rotate it will create Centrifugal Force that trend to moving turntable that why in theory better to have balancing force generated from the second platter that counter rotating . This is only one technical from many that designed and built KRONOS .