I've been trying to understand the purpose of this mode as the manual doesn't contain much information. I have set up the THX mode and assigned Pro Logic II Movie as the decoding method. I have then played back a variety of sources (DVD, SKY, PS2, CD, etc.) and toggled between THX Cinema and DPLII. Maybe it's me but I just can't hear any difference at all. Can someone please explain what the THX mode is for, how to set it up and what difference/improvement it should offer over DPLII? Does it just "fine tune" whichever mode is assigned to it? So in my case it would give a more "studio accurate" version of DLPII? And while I'm here, I've asked the question before about setting up the sound using some kind of external device (SPL meter?). Although the MCACC is good, the resulting sound is a little bit thin in STEREO mode when compared to DIRECT. I don't even want to try and set it up manually as there are just too many variables and chances are I would end up with a mess. What other options have I got for professioanlly setting up the sound?