Fred, Interesting. I've never been fully comfortable with impedance matching v.c.'s, and am sure that there are a lot of guys that are using impedance matching v.c.'s along with impedance matching switchers which would seem to be choking the heck out of the signal, not to mention eating up a lot of amplifier power?

To address the origional question, the second zone COULD be run into a switcher, and there would be "background" level music, be it a temporary measure, until a secondary amp could be added on to beef things up a bit.