I found 2 pioneer xw sma speakers for half price and decided to give them a try for the home system instead of the expensive Sonos system. My sound bar that I use for my tv is also connected to my Apple TV via hdmi. The issue that I having is that my speakers are put of sync when I use the multiple speaker function on iTunes. The pioneers are perfectly in sync, but the soundbar that is connected to the Apple TV is delayed. Not much but enough to create an echo. I've tried connecting the optical cable instead but it was worse. Is it time for an airplay receiver??