They will sound completely different so different that you will like one and not the other different so make sure where you buy the boulder has a good return policy if you do not like it because it is an expensive proposition to gamble on.
Integrated Amp upgrade path
I’m currently using a Macintosh MC 8900 to drive Vandersteen Treo CT’s, with a six pack of Rel S510’s, streaming only. I understand Boulder will shortly have a software upgrade for the 866 that will include an Air Play equivalent to allow full use of most streaming services. Looking for thoughts from anyone with experience with the 866: how much of an an SQ improvement with this upgrade? Incremental? Immediately noticeable? Thanks for any help!