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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
tls49's avatar
tls49
1,351 posts
 
I adjust speaker cables(AQ biwire comet)& occasionally it regains a full body sound however after about one hour it's gone.
If you have an electrical problem at the AC outlet, adjusting speaker cables will do nothing. Are the bottom connections on the speakers tight?
rrog
1,958 posts
 
If your system demonstrates this problem everytime as it warms up it is something in your system, but if there is a pattern which occurs at the same time everyday you may want to try a power conditioner.
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
5,656 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.
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