The 5-channel stereo mode simply duplicates the left front in the left surround and likewise for the right side(a center speaker gets both the left and right front equally). While the ambience DPLII extracts from the front channels is of course very similar to the rest of the front channel material, it isn't identical.
Thanks JohnK. I am aware of that. While it is true that DLPII recreates a more realistic ambiance, I enjoy this mode when I am sitting in front of my system at the main sitting position. What I like about the 5 CH stereo is that the room is full of sound without any imaging which is nice if I am moving around the room a lot or playing with my daughter.
What is your impression of NEO6? Do you experience as well this echo effect or is it just me? I remember a member (Dean I think) that mention that delays and other parameter could be changed to taste but I couldn't find it on the receiver.
