Hi Waldhorner; When I get a new IC, cables, component etc., I make notes about the music quality/character of my system with the new piece right away. Then a few days to a couple of weeks later I critically listen and make notes again, and of course compare the two. I suppose you could argue that you've just gotten used to the new sound in two weeks, but the questions to ask are: (1) is there any difference?, (2) do I like it? (3) is it fatiguing? etc. If you use music that you're intimately framiliar with you'll know. Cheers. Craig