Do you keep your amps and preamps on all the time

I agree 100% with Sean and follow the same procedures, Although I must admit I am lax when it comes to addressing the weather factor other than to have appropriate surge protection.

Yes, I do keep my amps and preamps on all the time. My gear doesn't run that hot. Common sense applies. I turn them off when changing cables, long absences, and stormy weather.

I agree with what you have to say Marakanetz. Even with what appears to be a massive amount of "fins", some of these amps are still lacking the proper amount of heatsinking due to the number of output devices and / or bias levels being used. As such, one should NOT take ventilation for granted and that is why i stressed the need for a lot of open area around devices that run hot. It is not uncommon for a high bias design to idle at a temperature between 110* and 150*, give or take. If the amp is running at the edge or above this temperature range, you either need more room above and around it or you should check into methods of low noise assisted cooling.

I've got a "high tech" temperature probe coming and i intend to do some testing with it. I think that the results may be pretty interesting to say the least. Sean
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Yes, I have solid-state and therefore do not have to worry about tube wear.

Yes. I leave everything on 24/7. The tube pre and ss amp REALLY need it. I suspect the SACD doesn't after break-in BUT , as I've stated here before from my experience working in recording studio's, turning equipment on and off shortens the life of the equipment. The studio's never turn off anything.