I reported this bug on the LARGE and sub when I got my unit, which was in the first shipment, pre ordered etc. I am presently waiting for a fix that they say they are working on. It has been so long I can't even remember the details but I can remember this. The issue is one of double bass, low frequencies going to both the sub and the fronts. There are some modes where the bug is influenced by the surround mode. Works OK in 7 channel but not in 5 channel. Definatley a bug and as I understand it, they are working on it. You can look for my old posts for the details.