I would prefer to turn it on/off. Using to power a pair of speakers on zone 2 of a reciever. I currently use sonamp 260's for this but am looking to switch. The B&K 6 and 12 channel amps do have auto on. By the way, with the 12 channel, if the first 6 channels are using 1 source and the second set of 6 channels are using a 2nd source, will either source turn the amp on? Thanks