Same with my LCD-X, I can't see anything up with them, they seem entirely good. Audeze do say B stock is anything that came back to them for any reason, so could be returns because someone didn't like them, or even unopened returns. A lot of it seems to be more "open box" than really "B stock", and some possibly not even opened. I have seen some say they had small cosmetic or pad issues though. /u/CyberMoose24 though had a pad issue and they sent him new ones, even though it was B stock, which seems very good of them.