beyerdynamic DT-990 Pro 250 Ohm

A few months back I ordered these, and at first it was all good. It's when a month later I bought a decent sound card to drive these, and noticed that on higher volumes that I was now able to reach, there was a vibration on the left driver. I researched a little bit and came to the conclusion that it was a hair stuck inside that could easily be blown out of the speaker with gentle air. It wasn't. I examined the driver from the outside and to my surprise, I was sent a pair of headphones that had been open! The screws were all stripped, so I was given some "used" or "repaired" headphones and the product information clearly says it's new! This is extremely disappointing and I'm waiting a reply on the RMA. Please make sure you're not sent the faulty headphones before the 30-day money back passes! I need good headphones for producing and now I'm stuck with these and down 130€!!!

Bayerdynamic, the corrupted swindlers!!.
I bought this headphone and i threat them like my baby, suddenly they stopped working while listening to music and i send it back, but bayedynamic refused to repair the headphones and wanted money, when i had 3 years warranty.

The headphones have a great sound, but is really uncomfortable to have on you're head over a long time. The headphones are way too heavy and build in bad quality, after 2 years they stop working and the company want about 120Euro for the repair..

Bayerdynamic = TRASH!
NEVER BUY ANYTHING FROM BAYERDYNAMIC!!