AVS Special Member
Join Date: Nov 2003
Location: Stockholm, Sweden
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After some testing with DVE testtones (including half R/Rs and half L/Ls) and movies in 5.1 and upmixed 2.0, I think a decrease of the surround trim levels by -1.5dB or maybe -2dB will be my choice.
I could have used Reference Level Offset (RLO) but I like the "full" effect of DEQ so I opted for the surround decrease instead.
The difference between RLO 0 and RLO 5 only seemed to be around -1dB, likewise between RLO 5 and RLO 10.
THX Loudness Plus increased the surrounds somewhere between RLO 5 and RLO 10 but is less agressive at higher volumes, at MV -25 to -35 it seemed identical to RLO 5 but at MV -40 and lower, it was boosting less than RLO 10.
Note: the DVE testtones for half L/C and half C/R also made me increase my Center and Right trim with 0.5dB each in order to produce phantom speakers between the real ones.