So you made me curious and I did the following test: - I configured the 7200 as main speaker and played a youtube video in which someone was contineously talki

So you made me curious and I did the following test: - I configured the 7200 as main speaker and played a youtube video in which someone was contineously talking. - I measured the distance to the 7200, which is next to my keyboard, and it was almost 2ft away from my mouth (standing desk). - Then I opened Quicktime to make an audio recording using the 7200 as input device, talking while the youtube video was running. The result: I could only hear myself on the recording. Even while I was talking, or making other sounds, I didn't hear the video at all. So yes, I think it's full duplex. And no echos.