I currently have a Shunyata Alpha -HC power Cable powering my Audio Research REF75 SE amplifier. I also have a pair of Shunyata Black Mambas powering my 2 REL Subs. My REF6 preamp is connected using an older Cardas cable I had laying around (forget the name, but it was about a 400$ cable), and someone modded it to accommodate the C19 connector required for the ARC pre. My Lumin network player is connected with a Shunyata Analog power cable (I think its called Alpha as well, but can't see into the abyss to get a good look.) Frankly I'm not sure why I have a Shunyata analog cable. My question is; Should i replace the the Lumin cable (analogue) to a digital cable first, or, should I replace the Cardass cable to the preamp first. Which will give me better results. Thanks.