The experimental audio ecreferencedelay setting did not help me. I got a sound bar and that fixed the problem. You will most likely need to get a speaker of some sort to fix the problem. As far as a recommendation for monitors you will probably need ...
I am having the same problem with a sx20. The tv is a sharp lc-60le650u. I've been seeing others online with this problem with different displays, as i've been researching the problem heavily this week. The only thing that completely stops the echo ...