With my eMac I leave it on, because people here at MacRumors tell me its like an appliance, and it should be kept on all the time. I turn my Creature Speakers off when I'm not at my computer because someone said that the sub will blow is its left on all the time. So now how about my printer? I don't see why not, but I didn't see why I should turn off my speakers, so thats why I'm asking...