I've always wondered this, can you leave your amp on too long? For example, today I learned to play The Distance, by Cake, hurray! Then I noticed it was noon so I went to school, then when I got home at five, I noticed I left my amp on. This isn't too uncommon for me, not usually as long as that, but I kind of have a short attention span, and usually play bass for five minutes, then go do something else, then more bass, then something else, and so on. So basically I get home, turn the amp on, play throughout the day, in like five minute increments, then turn the amp off and go to bed. Is this bad, or would it be in worse circumstances like leaving an amp on for, say, a day or two, just sitting there not getting played through? And also, similar topic, how long would you have to play through an amp to make it just not play no more? Like if at woodstock, for some reason they only had one bass amp, and everybody just played through that one amp, but continuously, till the amp gave out, how long?