I own a pair of Beyerdynamic DT770 Pro 80 Ohm. My left driver has been rattling for a really long time at low frequencies. So I decided I would open it up and remove the hairs everyone was talking about. The driver was really hard to get out and I tried prying on the center of the driver cap(http://i.imgur.com/rdibj7C.jpg). The cap moved up a bit, but the rest of the driver didnt. Now I realise this could have damaged it.
I finally got the driver out and saw all kinds of hairs (http://i.imgur.com/XGOS4FU.jpg).
I started removing the hairs carefully, but one of the hairs was stuck. It just didn't come off. Suddenly the cone deformed upwards(away from the driver) a bit as the hair broke in two. I gently tapped it back into place.
I tried testing the headphones, but my left driver had stopped working :(
Could this be because of the center cap moving and/or the cone deformation? I was searching around and people seemed to have problems regarding poor cabling. I checked the tiny cables for the driver, but they seemed intact ( http://i.imgur.com/Pn3ct3l.jpg)
Can I fix this?