I also leave the box on all the time... but it's important for people to remember not to block the vents on top of the reciever. My wife and daughter are bad for doing this, they put things like cd cases,magazines or whatever on top of my components, it blocks the air and causes them to overheat. Good news is I finally broke them of doing this. I do see lots of my friends do it simply because they don't realize it matters. Anyway, I leave my box on, don't really have a reason.