Stiletto Ace sounds muddy some of the time.

[Jafi]

I know this is not am amp problem because it happens on other amps at different times of the day.
The other day it sounded great and I checked the voltage coming from the socket it was 120v.
Today it sounded garbled , very muddy and the voltage was 126v.
I have everything plugged into a Furman power conditioner but that does nothing to reverse the problem.

Question: Is it possible that a mere 6 volts can change the sound that much and do I need to invest in a voltage regulator?

 

[Gordybaby]

Try posting in the stiletto section. You might get better response.