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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
fishing716 OP
316 posts
 
It seems like the problem is everytime the system warms up.
Everything was replaced with the same results and was unable to locate any malfunctions

Recent amp,speaker cable & speakers
fishing716 OP
316 posts
 
The connections on the amp are tight
For some reason if I reconnect speaker cables I regain the missing low bass output.
It's quite vexing
yogiboy's avatar
yogiboy
2,678 posts
 
Sounds like something is wrong with the biwire cable. If you can bypass it give that a try! It might open up when warmed up.
fishing716 OP
316 posts
 
How do you bypass biwire?
tls49's avatar
tls49
1,318 posts
 
For some reason if I reconnect speaker cables I regain the missing low bass output.
That’s why I ask about the bottom connections on your speakers. A problem there would result in a loss of bass, and it’s probably just one speaker. This could be the cables, or an internal connection at the speakers’ terminals. What type of connector are you using at the speaker, Spade or Banana?
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