This is a very important topic. The fact that my system(s) sound better late at night, early in the day, and on Sunday has been bugging me for years. There seems to be a definite correlation between power usage on the line and sound quality. Sound is noticably better in the middle of the night when power usage is at a minimum. The problem is that no matter what power cords, power conditioners, filters, etc. I put in the system, some of which do improve the sound, this problem never goes away. Is there a solution?
Different & inconsistent sound quality
I am noticing different sound quality from my audio system, depending on when I listen to them. My system consists of Krell integrated amp, B&W CDM 1SE, and Sony DVP-7700. They are connected with Transparent ML Super interconnect and MIT T2 Biwire speaker cable. For example, in the moring and very late night, piano recordings sound very clean, detailed, and transparent, however, in late afternoon or evening, it seems that some of piano notes from the same CD sound very dull and veiled. The phenomenon is true of other recordings of cello, violin, and etc. I suspect that AC noise has to do with the problem, so as a first step, I consider upgrading stock power cord for my integrated amp to a better one such as Transparent PowerLink Super or others. Could anyone help me with any possible solutions to the problem I'm experiencing? Any suggestions or comments would be greatly appreciated.