@NordicDave is a wise man. First he starts by agreeing with me. I have no experience with any ZMF, but have heard from others what Dave is saying.
@NordicDave continues to be very wise. He agrees even further with me and provides additional examples. It’s almost as if he read my mini-review of them. I’ve heard some other 500 series Sennheisers, and had a similar impression.
Way to go Dave! 
