JonHan, the DSP circuitry of the EP500/600 causes a touch of a delay so a setting of twice the actual distance is normal.
I believe Dynamic EQ was designed for playback at low volume levels as it boosts the lows and highs, Keep it turned off unless you are listening at low volumes.
Yes, I normally set the EP500 distance at +50% to compensate for the DSP.
I find Audyssey's enhanced bass most annoying with TV and may only use it
for movies where I did found it dd add a lot for "Master and Commander".
Thanks for everyone's help.