I recently fell into this music player rabbit hole, and after extensive testing, I'm down to Pure Music & Audirvana. In the current versions, these two seem fairly close to me: the differences: Audirvana seems to have a more analog / tube-like sound. Sometimes it seems that it makes the music...

This typically happens at the peak of her voice. Is this normal? Has anyone else experience this, or do I need to take it to Sennheiser for replacement.   I've seen this when they're powered directly from my Macbook Air or iPhone, as well as when powered from my Miniwatt amp.   Also, an...