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

What gauge do I currently have?
My cables are Audioquest Comet biwire
Audioquest does not publish specs regarding their cables gauge or electrical behavior, for some reason. I'm guessing here, but I doubt they offer large gauge speaker cable for their low-end or mid-range lines. Like many cable companies, they save the large gauge wires for the big boy$$$$.

The suggested large gauge cables are an affordable way to bring low resistance signal transfer from your integrated amp to your speakers. Given the same cable design, a larger wire gauge should yield lower resistance values.

Don't waste your money on the Highwire Powerwraps featuring voodoo science.

@ fishing716,Hi, I do not want say this,I told you so!,,I already gave you a complete solution,you would be done!your problems with your system would be all but a distant bad dream!,go back to the information I gave you,, wala! Happy listening!,
@ fishing716,I believe I would start with your power at hand!,high -end recepticals for each componet,a dedicated 10 gauge electrical line for each componet,with a dedicated ground for each componet with a 20 amp breaker for each componet, this is what I use,problems?,I have none!,the sound will improve dramatically as well!,this will take a few hundred dollars to do,the pay-off sounds in the thousands!Happy listening!

I'm sorry but don't understand all these details such as 10 gauge electrical line(what is that?)
Also 20 amp breaker(what is that?)
I apologise if I'm not knowledgable of electrical terms as you assume.
I'm just a music listener
John @ audioconnection
That is a very helpful suggestion
I will contact an Electrican
This is Anthony from Staten Island
I've been in your shop many times and purchased B&W 804n from you 15 years ago.
Say hello to Mary your receptionist