When I record in Studio One and directly headphones have connected, I hear a faint clunk in headphones Metro Omar term. The clacking sound is not heard in the recording, so it bothers me even further. Maybe this is normal, perhaps a defective, but as I said, it does not bother me, so I pull from no star. The information I've just had better be passed on to you readers / dear reader, then maybe you can pull off even a star from my rating if it were a nuisance for you :)
Maybe can indeed other buyers say something, because perhaps it is indeed actually a defect.
I would buy the unit back and think it shots for a small home studio, or private or Youtube, etc. is completely suitable. I think professional's will resort to more expensive equipment, however, the gain in audio quality for me would probably not relevant, or even not at all be heard :)