I ahve just got an MJ Ref 100 and very nice it is too. I did assume that all subs had some kind of auto on/off curcuitry but obviously not. I clearly don't want to have to switch it on every time I want to put a CD on and then have to remember to turn it off again. What I want is to be able to switch it on and off with my processor. Is there any device that can do this using a 12v trigger? Like a mains block with triggered sockets? How do others get around this or do you just leave it on 24/7?