12-19-07: JohnmcalpinAs is mine. It varies from day to day and time of day.
But, and more frustratingly odd, is that it is intermittent.
I have an appointment with my local Dept. of Water and Power to have my power line monitored for two weeks. Apparently, if there is a certain amount of voltage fluctuation, they have a fix that can be applied.
I also have the amp -- and every other component -- sitting on a Sistrum platform. I wonder if setting it on something else might do the trick.I once had a DVD player on a Sistrum platform. The DVD player is a model known to have a fairly pronounced vibration issue. The Sistrum exacerbated the vibration two-fold (at least). FWIW...