Thanks for the advice. I like the audio channel amplifier. As for the volume controls, I really would like to have control at each zone. Hot tub area, Fire Place area, Front Porch and so on. For years we have been going back to the stereo to adjust outdoor volume. My wife especially and I want be able to control the volume when sitting at a zone. She says 5 zones, not 4. I support her stance because I get to spend money on stereo equipment.