Hey everyone. After listening to my crappy 2.0 Logitech speakers for so long, I've decided that it's time to buy a new pair of headphones. Over the years, I've owned a few decent headphones, which I use about 70/30 for gaming and music respectively. These were the HD598, HD555, and the AD700. However, these were all open headphones, which used to be fine. Now, due to, isolation/leakage concerns and the like, my goal is to find a closed set with decent isolation, decent soundstage, and low sound leakage for musing and gaming. Last week I bought the Beyer DT770 Pro 80s. After reading so many decent reviews about it, I thought I'd give them a shot. They isolate decently, they have massive bass (an initial shock; for reasons why, reference my previous headphones), and a good soundstage, but I just can't wear them for longer than 20 minutes. It's not that they're uncomfortable (quite the contrary). They clamp just enough, and the pads feel really nice. It's not due to their slightly bright treble; I can tolerate that. They just give me a headache; there is a sort of pressure that builds up after a while that makes me take a break. I've never experienced this before. Even unamped, it's the same story. I thought that this might be just getting used to headphones after a while, but I've used them for a few hours over the past few days, and it persists. I thought I was crazy, but I did some research and others have reported similar. For example: http://www.head-fi.org/t/540036/closed-headphone-fatigue-blues eucariote's post specifically mentions the DT770-80 as the only headphone to cause this. Does anyone know why this happens? I was just about to pull the trigger on a set of Ultrasone Pro 900s and a new amp, but I wanted to get some guidance first, before I purchase something else. I was going to upgrade my amp soon anyway (a CmoyBB was all I kept after I sold all my previous equipment; I mean to buy an iBasso D4 dac/amp whenever it's restocked). Any recommendations for new headphones? My budget has increased a bit, since I don't want to run into this again; if I do, back to the 2.0 speakers . I've got about $250 to spend on the cans, and $200ish for a dac/amp. I've got my heart pretty set on the D4, but my wallet is pretty much ready for the inevitable wringing (if the new set calls for it). Thanks everyone. sidenote: if anyone wants to take these dt770s off my hands, let me know.