My Triton's have a class D amp (bass amp) and there is no power switch on the speaker. The manufacturer (Golden Ear) merely states that when an audio signal is present the amp is "on" and when no audio signal is present for a period of time (20 minutes or there about) the amp goes into "stand-by". However, even in standby mode they do draw power (albeit very little) and for that reason and other piece of mind reasons when I'm not listening I power them down via a switched power conditioner I have them connected to. I only turn them off when they have gone into standby, not while the amp is still actively on (as evidenced by an LED).