the dialogue function is preset. You can adjust treble. bass and sub-woofer. the equalizer has 3 additional presets also. movie, music, dialogue and game. All in all I'm pretty happy with this. I had the same issue with dialogue. 7 year old LG with 10w speakers. This was a major improvement for a minimal amount of money. Bear in mind....it's a $149.00 unit (or $179.00 if you didn't catch the sale) not a $1049.00 unit.