His experience, i can relate tbh. a year ago i wanted to buy a pair of DT770 pro 80ohms version, and i got channel imbalance on the left can. I ask warranty service and they offered me 2 other pairs, and all of them got obvious channel imbalance on different side each time. I was too frustrated and ask for another different pair from beyer, the custom game one, and got into the same channel imbalance problem. In the end i asked for a refund and that experience left me "traumatized" for a few months, and i just got back into audio a few weeks ago. Idk if beyerdynamic is notorious for channel imbalance in other regions or not, but i sure got a bad time with them.