Integra also make a nice amp just for this purpose the ADM 2.1. I have just added a pair of these, one to run a pair of M22's in the dining room on the multi zone, and the second to run a pair of M22's that I added to the VP150 for use on the center channel. The ADM 2.1 can be set to be turned on by either a 12v trigger from your amp or can simply be set to turn on when they sense an input signal on the line in. You can find more information at www.integrahometheater.com