@Adstew: thanks adstew!
for SS amp, argyro use sovereign amp, maxx1973 use vitus or bvdiman use FM acoustics and soulution, maybe they can explain it better.
@bostonbean: i'm the 2nd owner, so i don't know how many hours total, but at my place around 30 hours, the sound is still changing, maybe it isn't properly burned in before.
The sound is more refined than before...