Braro, thanks for the email and hope you don't mind my posting thoughts here. I have no experience with the Supratek Chenin preamp and am curious how it works driving the JC-1s, nor am I familiar with the Audioquest Cheetah interconnects from Wadia 861 to preamp. Is the sound still bright going direct from CD player to amps, using the digital volume control? You might try something in place of the Alphacore MI2 speaker cables - some amps don't like them.
Brian