I like Audible Illusions idea on their preamps. When the power switch is off, there is still a trickle current going through the circuits to keep it ready to go and probably to minimize thermal cycling.
My Apologies to Miller Carbon
You suggested I leave my solid state components on all the time in spite of the trickle charge when off. Today after almost 2 weeks I heard better more solid lows, more air between the instruments, less hash, etc. Miller Carbon also introduced me to the Schumann Generators (2) which I also find helpful. I have very heavy Vandersteen speakers and am deliberating those suggested springs. Thanks MC