Am I hearing things?


I just an extra  new dedicated line run beside the other one. with 10 gauge wire, 30 amp breaker and a 20 amp rated outlet. I don't think it sounds as good!!! What the hey. A little shrill in both vinyl and CD. I'm comparing from what it sounded like last night. Does electricians wire, breaker and outlet have to burn in? Am I alone in this. I'm have a whole system AC but in and the temp got up to 80. Maybe that is why. Also I'm listening at 11 am EST. So the power grid may have an affect. Did I just answer my own question or have other people experienced this. The original dedicated line was put in in 03 with 12 gauge wire, 20 amp breaker and a 15 amp outlet. Are these 2 lines picking up interferrence? 
128x128blueranger
General contractor here. You can NOT use a 30 amp breaker with a 20amp rated outlet. It could over heat and cause a fire. 
Fix that ASAP and stick with a 20amp outlet and you should be good. You shouldn’t need more than 20 for audio. 
Agree with mickeyb

I had a licensed electrician install a 20 amp circuit for a 4bSST2  (thinking I might later run a pair of 7 monos.) It has the 20 amp circuit breaker. The remainder of the system runs via a 15 amp circuit. No problem

My home is 100% electric, and the major sources of use are the cooktop, water heater and dual  heat pumps/air handlers.
+1 @mickeyb 

Do not put a 30 Amp breaker on 20 amp wiring/outlet. This is life endangering, not to mention illegal. 

Of all possible tweaks, don't do this one. 
Actually you should swap out the 30A breaker for a 20A breaker and leave the outlet alone.
You obviously don’t know a thing about AC. 

If you forced the wrong BRAND breaker into your box, you could be in for a hot time. You know, (unlikely) what I mean, right?

Some breaker brands will “fit” into a different brand of box. But the contact may not be good so you may get a lot of resistance and heat build up and this can cause an “electrical fire”. I don’t have the patience to explain this to you, but if you think you may have made this mistake you have made a dangerous error.

The 30 fuse in a 20 circuit is just plain dumb, but it will not, by itself, cause dhrillness .< that IS a period. There is an easy cure for your shrillness - wait two weeks.  You will be acclimated to the “new sound” then and you will probably put it down to “burn in” - unless your house “burns down” first.

Hiring an electrician is quite easy. Learning how to BE an electrician is much more difficult.

”Burn in” is an audiophile mental construct. “Burn down”, in your case, may turn out to be an audiophile physical “destruct”!

Good luck.