I wonder why you found the 520 so much poorer on speech more than I did, positioning perhaps? Altho a bigger 3way center is a good thing....I have not a clue, but that's what I found. 3 way vs 2 way? Doesn't a 2 way cancel out sound waves. Whatever it is I don't know why. It was awful, dialog just got lost at times. Not all the time but sometimes.