Leave an amp "on" permanetly


I understand that tube amps need to warm up sufficently before they can reach their potential. Is this also true with SS amps? I own a McCormack DNA-1 deluxe, and I hear a discernable difference when listening to my system "cold" versus "warmed-up". Do you also find this to be true?

If so, would people recommend leaving a SS amp on permanently? Could I damage my amp by doing this?
drewyou
Danlin1, I think Stevecham was referring to the "Audiophile Environment" as in our hobby and not the environment as in the planet.
So what happens when you are out and there is a thunderstorm at home?
My practice is to switch on the system and let the system play a CD end to end while I am having dinner or watching my favourite program on TV. So when I am ready to listen typcally in about an hours time, its all ready to go. I shutdown everything when its time for bed.
I guess how I was raised, taught me to turn things off when not in use. I do keep my cable box and/ or pre on, all the time.---I also think my CJ350 (ss), uses more juice than a 100 wt. bulb??--When I ran tubes (16 el34's) you know that was off when not in use.
Not sure I agree with "on" permanently. Most hi end hi-fi stuff will be tubes or SS amps that run mainly in Class A operationn.....these naturally run very hot and waste huge amounts of energy and besides, tubes have a limited life span...why would you want to shorten it further?
Today's New York Times has an article on how much energy is used by electronics devices that are left on vs. putting to sleep or turning off. Even if you choose to leave your audio components on 24/7, you may want to look at your practices with computer monitors, cpus, dvrs, and cable boxes. Here is the link:

http://www.nytimes.com/2007/06/14/technology/14basics.html?_r=1&ref=technology&oref=slogin