Loss of bass & full spectrum sound


Can anyone shed light on my audio system problem?
I have PSB Synchrony one,Musical Fidelity M6i + cd player & turntable along w/video
The sound is Full with deep bass then after an hour it reverts to a different unenjoyable presentation with no life..
This has been going on in my NYC apt for about a year
I have a great sound then it changes (white-washed).
I adjust speaker cables(AQ biwire comet)& occasionally it regains a full body sound however after about one hour it's gone.
All my components have been checked to function properly.
I suspect an electrical problem but voltage is steady 120
Any similar experiences?
fishing716
I worked in the audio industry for over 20 years, and even had upscale systems years before that time. Have helped many friends and other people solve just about any problem you could imagine, however this one is unique. You said you have used different amps and speaker cables, has this happened with the same pair of speakers?
Have you tried treating your refrigerator with sonic tonic? What about the lamp cord in your guest bedroom? I'd start there.
System doesn't sound good at all today
No bass or fullness whatsoever.
I had Synchrony II speakers now have synchrony I with same problem.
It must be because I live in a complex & the electricty is flux.
I was hopeing someone else had similar problems but mine seems to be unique