Summary: I really hate to write a bad review on products but this is one I have to do. The receiver does have good sound. However at higher volume levels the unit shuts down and tells me to check speaker. I have contacted Yamaha tech support and they told me that I can not drive speakers A and B at the same time. This not what Yamaha says on it's product information. Very misleading. Now when I drive one set of speakers at 8 ohm.