I do not hear a lot about the Zu Mobius Mk.II but I really like it. It has a low noise sheathing, aluminum connector body's, with press-sinter Elkonite copper pins, solder-free coldforged pin termination's. It is lighter than the first version, tougher, flexible, less microphonic. Blaa Blaa.. More detail's on the web site.
The bass on my 650's went from wooly to tight and way better definition. I was wondering if the 650's could do better than one note bass..They can, and overall the timbre and texture now sound more natural, with greater resolution over the stock cable. The bass is fast when called for and the high's extend out nicely. I just upgraded my equipment and I hear even more details with this cable. For me, it just sound's like the right cable for the HD650's and I'm satisfied. If I were not then Zu has a 60 day return policy. Oh yeah, it's American made at that. Web site at Zu Audio for more detail's.
I recently had this silver over copper cable terminated for my Audeze LCD-3's. I loved it from the beginning and It is my most detailed cable. It has all the benefits of both metals and sounds very balanced. I think the guy's at Zu have the formula just right. Most notable are the extended high's and punchy well defined bass. Also, the resolution of this cable is very good. I'm a bit of a cable freak and still like to try other cables. But I can not find any fault in this one. I have not spent $600 + yet; but I can say I really think the Mobius is worth it's cost.
Edited by RubyTiger - 7/17/13 at 12:25pm