I just received my UPA-5 yesterday :) and hooked it up to my Yamaha Rx-v863 via blue jeans cable. My Left/Front speaker will not produce sound in 2-Channel (Straight) mode. However, when switching to 7-channel surround mode, the Left/Front operates correctly. It also works when playing Blu-Ray...?? Emotiva says the Yamaha needs service, but I'm looking for any other input before being receiver-less for weeks :(.