Should I leave my equipment on ?

I have found in my system that when I leave all equipment on it sounds better. If for some reason I have to turn my system off to install a new peice or what ever I find my amps take the longest out of all my equipment to warm up, about 24 hours to get them to there best but after 2 hours I find them about 75% sounding good. With the digital I find only about one hour is needed. So I leave my equipment on 24/7!
I have done this for the past ten years, also you'll find most Co. telling you to leave on 24/7, for tubes it's another story, as I think you want to power up one hour befor listening, but after 4-5 hours of being powered up tube stuff seems to sound good. have a Sonic Frontiers sdf-2 D/A and it has a stand-by swith so I can fire up the tube output before I give a listen, the SDF-2 is alway on internaly except for the tube section. Sonic Frontiers says to turn on 30 minutes before to warm up and most tube Co. will say the same. Hope this helps and good Listening!

My amp has the power switch on the back encouraging me to leave it on.

Elizabeth, you're close! Actually, it's the coupling or storage capacitors in the amp/preamp, that take time to charge, stabilize, and reach optimum performance. The cross-over networks in most speakers are passive, and are good to go, immediately. Of course, new speakers will take time to "burn in" the cross-overs and drivers to reach optimum sound. And if you don't play your speakers for several days, it mat take a few hours for them, as well as your cables and interconnects, to reach peak performance again.

Thanks to all for such comprehensive answers. FYI what prompeted this question was, among other things, comments I've read from some audiophiles who stated their equipment has NEVER been turned off.

Here is a similar query- I'm currently evaluating different pieces of equipment and interconnects, etc. I have to turn some things off to switch things around. If the equipment is turned off for but a few minutes after it's been on for , say several days, is that the equivalent of a full blown cool down ??

Thanks again to anyone with advice for me.