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

Showing 1 response by dwest1023

I have experienced the same with my Pass Labs 250. It is not speakers as I have several. I just wonder if it's the density or the air in the room at the time. Mine has no pattern to it. I get blow you out the room bass most of the time, but then all overtime the amp is just thin sounding in the bass. Come to think of it, this has happened with several of my amps. I have no answer.