A Confused streaming system - Mutec / SOtM Ultra

[Rama]

So now that I have read the whole post it seems that the issue is with harshness in HF. I had a very similar experience with my speakers and for a time I thought that the ribbon tweeters were damaged. I had the speakers returned to the factory and got the tweeters replaced. However that was not the issue. The speakers were so resolving that I was noticing every fault in the mastering. I have two solutions a) Try another set of speakers or b) Change speaker cables.