Mirek. We know that the apodizing implementation is different in each different product due to architecture and available MIPS. The reference implementation for two channel has, to date, been the 808i.2 (apparently). It remains to be seen how the 861v6's apodizing compares. Using the HD621 is a workaround (which I currently use to great effect) which probably doesn't match the quality of the 808i.2's implementation. And that is the problem if you want the very best.

Roon Developer and ex-moderator of this Forum
I am #25 in the HH1 photo of fame.