Quote: They already got them on their website so they probably will get them for tryout, too. Then I definitely will give them a listen and share my impressions with you. (Maybe even with a direct comparison if they still got the 1st generation)    Quote: That would be really awesome!

Quote: I already listened to the T1 and they suited my preferences very well. Now I hope to be able to compare them to the 2nd generation soon to make sure which I prefer before buying (even if its just little difference, I want to decide for myself and not to other people's reviews )...

once again, nice work!   So you say they are even a bit better than the original T1s? And that for a cheaper price ... Guess, now I really have to try it myself. Hopefully I will get the drivers of the 2nd generation T1, would love to hear them.

    Quote:   So, it won´t work while using glasses?  Or will the base still sound good, if you make the holes larger (or maybe use other earpads?)? Actually I will have to wait until I can try it myself (the T1 drivers are just to expensive for me right now...) That´s the same in...

Nice work! Actually I'm thinking of using tesla drivers instead of the DTs. From the T1 or T5p probably.

Wow, much more detailed answer than I expected.  Thanks a lot! If you want to, I will keep you updated, which one I´m choosing and then how it sounds.    But actually I´m from Germany, so I can directly order at the website. (Hope I´ll be able to add profile information soon)

I´ll probably use the drivers from the T90 or a 600 ohm DT770. Maybe you can give me some advise, which driver would sound the best in it? (I´ve never listened to the T90, just the DT770) Btw, i´ve heard that Beyerdynamic is using the same drivers for the 770/880/990. Is that true?

Nice, guess then I will also get these earpads.    So you have tried it with the tesla drivers, too?

Ya, i want to put the 600 ohm drivers from the DT770 into it. But i don´t want to use my perfectly working COP´s for it, so i´m looking for broken ones.    Pretty much the same like in this thread: http://www.head-fi.org/t/638028/beyerdynamic-custom-one-pro-thread/30#post_11700843

Anyone has a COP not working any more?    I would buy it. (I need just one without drivers for a project ) If someone is interessted post a short answer or send me a PM.

Wow, nice work man! I have also a pair of these headphones and i´m thinking about changing the drivers, too. Did you just soldered the new ones in or was there more to do? (except improving looks and comfort)   and are these earpads a big improvement to the original ones of the COP?

on the first page of this thread you can find some different Op-Amps tested with the HD650s. According to it the LME49720 is a good choice, if you want more bass the LM6172 would be a better choice. The LME49720HA has a better bass and also the sound stage should be better than the NA´s, but...

hi guys, right now i have 2 LME49720NA  and 1 LM6172 in buffer. would it also be possible to use single Op-Amps (like the LME49710HA) in the I/V ?