Hi folks, Scott and Trikos,
I am sorry if my former message confused you guys. What I said was I set the volume to -12dB when testing those 3 surround modes, not bass loss of -12dB. Trikos, I do not use Y-cable.

If you guys have the DVD "Supper Speedway" in DTS 5.1, test those 3 surround modes (Straight DTS 5.1, DTS Neo:6 and then DTS + PLIIx), go to the chapter where the test driver passing through various passenger over passes across the run way before making a splint. Don't change the volume but just flip those 3 modes. You should hear the bass differences every time when the speed car passed under the cross overs.

Kwok