i think this is de best setting:
Here are the setting I used to get started:
Sound Field: Movie
Amp Menu (Amp Menu Button and then use the up/down and left/right arrows to navigate) ....Level .......CNT Level: +4 ...... SW Level: +6 ...... Audio DRC: Auto
.....Tone ......Bass : +5 ......Treble: +3
.....Audio .....A/V Synch: On (there was a slight delay between the picture and sound that was noticeable when this feature was turned OFF. Turning it on corrected the problem) ......Dual Mono: Main ......Night Mode: Off. (Turning the function ON enables clear voice and lowers Bass at low volumes) ......Input Mode: Auto
have a try