Unless it is a tubed amp and / or a very high bias SS design that generates gobs of heat and you are unwilling to pay the electric bill or have small children in the house and are concerned about their safety, leave the amp on.
Since we are on the subject, Adcom amps have a BIG problem with power switch failure. Luckily, Adcom is VERY easy to work with in this regards and their parts department is a flash to send parts. I know this as i've replaced several switches for friends that had / have Adcom amps.
George: $200 for a power switch?!?! I'm in the wrong business : ) Sean
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