After extensive testing:
- Terrific, quite simply absolutely great
I hear fine nuances that I never perceived in certain pieces of music before. The sound is very clear and defined. The Centers voluminous. The basses vigorously (if the connector correctly in your ear - no other bass). Office sounds are completely hidden (my colleagues waving now to draw attention to themselves). On a motorcycle in half volume of the MP3 player used (bearable, no nonsensical tearing) music (Enya) comprehensible to 150. Up to 120 defined audible. Ambient noise insulation also here effective.
Processing and presentation (packaging) absolutely great. Cable very supple. No cheap plastic parts, but all stainless steel. Bend-protection on the jack socket, for example. By a spring.
The choice fell on the place of the MA750 MA600, as the "Over-Ear" variant possibly secures stability even under a motorcycle helmet. Otherwise, the MA600 would definitely reach.