Reporting on burn in.
I updated the new firmware on 4/6 and felt it immediately improved the sq like what sat7 had stated. With the advice from Vinshine, I have been patiently and curiously to hear any burn in difference in sq. Up until 4/30, it was still sounding good as before. During this time, I had 10 days with streamer/P-II on all day and amp off. However, everything changed on 5/1. It sounded much much better. At this point, I believed I had put in at least 350 hours in the new firmware. Now, the presentation is warmer and fuller or richer sounding. Or, it is more mature.
BTW, I am comparing the updated P-II to the DAC that costs 3-4 times the price. It is incredible how fast the digital playback has improved.