I have really appreciated @elizabeth 's comments on how you listen on this thread. I recently replaced my entire system after a lot of A/B testing at a dealer who left me alone in the room to listen but when I got it all home I wasn't happy, I was hyper critical and trying to work out what the weak link was, Cables? DAC? Room? Placement?. I went away on business for a week, came back and was listening to Hilary Hahn Plays Bach and losing myself in the sheer beauty and suddenly realized it sounded totally different to how it had a week ago. The problem wasn't the room or the equipment, it was me. I'm a computer engineer, over analytical and deeply cynical i.e. desperately trying to listen to the SQ of new equipment rather than the music. After a trip away I 'forgot' to listen critically and got in the zone - what a world of difference.
In summary, to me audio connects are like night and day - I hated optical in my system and love Chord Clearline COAX. Speaker cables are a smaller difference to me but I can hear a difference. I strongly believe power cables shouldn't make a difference from an engineering point of view but I will at least try BLE Design and see if A/B I can hear a difference (I have PS Audio hospital grade socket and a Panamax power conditioner).
In summary, to me audio connects are like night and day - I hated optical in my system and love Chord Clearline COAX. Speaker cables are a smaller difference to me but I can hear a difference. I strongly believe power cables shouldn't make a difference from an engineering point of view but I will at least try BLE Design and see if A/B I can hear a difference (I have PS Audio hospital grade socket and a Panamax power conditioner).