Channel drops is a known, common problem. Clean the jack and plugs with alcohol or De-Oxit.
Sparkly highs? Treble and bass roll off fast. These are very mid centric with inverted U shape FR. It's certainly possible to improve FR without messing up the liquid smooth mids.
Thanks for the tip regarding how to ameliorate the channel drop out issue. I will give it a try later.
Not sparkly highs but splashy highs. Not quite noticeable at first, but my ears eventually picked up how the highs are bouncing around in the cups (noticeable by how tired/annoyed my ears eventually got after a few hours).
I have no intention of modding/dampen the headphones with clay or felt. My philosophy with speakers is to keep the enclosure resonance "live" as though it's a guitar or violin body. So, I like to keep the cups on the T50's live too. But, would like to eliminate the splashiness with some diy diffuser. But, they would have to be really small to fit in the headphone cups. (yes I admit this does sound silly).
Edited by viggen - 12/13/13 at 2:47pm