I recently got the HD6XX and i really like them, but the top part of the cable (the double fork looking thing) is really sensitive and any light touch to their side immediately disables any audio to that part of the headphone. Many times ill type something on the keyboard and lightly touch the top connector and all sound to that side stops. This is easily fixed by sorta tilting it back into place, but im thinking maby get new cables if its not normal. Also the tilting is not to its "shortside" but to the "longside" like it tits toward one of the prongs.
Ps. english is my second language