I'm using Beyerdynamic dt990 premium 250 ohm and sennheiser ie80. The popping is irrelevant of the volume setting.

So I've seen mixed reactions to this question: is the popping sound when shutting down the O2 harmful? One of mine gives a slight click while the other gives a healthy pow! I generally unplug my cans before pressing the power. I've done the suggested tests and voltage relays seem good. I've also...

Thanks for the input.    Finally I just ended up selling them for a minimal loss. I didn't care much for the sound of them anyway. For the time being, I picked up some Havi B3 Pro1's off of Massdrop. Much more comfortable and nice sound for the price. I understood that the fit is similar to...

I got these headphones a few days ago and it's been bit of a struggle so far. I no problems getting a good fit with the left phone but I just can't get a good fit or audio from the right. I tried all of the tips with no joy. Funny enough, I tried it with the cable detached and it fit comfortably...

Thanks for the advice. I went through the circuit again and found a short across pin 1 and 2 of u5. It was on the top of the board too. It worked fine before I put it in the case so I think I may have got some metal particles in there from the install. I remove the ic, resoldered it and then did...

Hi all. I recently assembled a CMOYBB from jds labs with no problem so i figured i would try an O2 next. I put it together and performed all the tests with a dmm recommended on Nwavguy's site and everything looked fine. I set up with for rear power and I left out bt2 because I'm planning on...