If you wanted to set up the preamp and amp in an optimal manner you would have them on separate circuits. You would also have your digital on a separate circuit. The OP is not in a situation where he can do that.
Audiolover718, glad it has worked out well for you. Your punishment has been reduced to publicly wearing a sign stating "I have my amp and preamp on the same circuit."
Audiolover718, glad it has worked out well for you. Your punishment has been reduced to publicly wearing a sign stating "I have my amp and preamp on the same circuit."