Yeah,they take a few days to settle to sound smooth, IMHO bass is not very deep but very good for such small speaker, very punchy. Strange about the congest sound as my pair just was a bit bright at first, not congested. Where did you put them, next to wall gave me some nasty coloration in the mid-bass, but moving a way about 2-3 feet cleared it up?
Cetoole how do you like 107di do far, the pair he had out of the box sounded very nice?