Hey guys. I'm the guy from the video. I know I had a scattered brain that day of filming, and didn't have a whole lot of time with the headphones before pushing out the unboxing. Just as a precursor, as I'm sure you discovered, I don't know everything about audio. I know just enough to dip my toe in, have spent a lot of time around a lot of the industry's most professional headphones, amplifiers, and sources, but I am more of a consumer than an audiophile. I'm using a V-CAN amplifier to power the HE-500. I have also ran them through a FiiO E7 (DAC through USB), and they sounded surprisingly good considering their relatively high inefficiency (even though they're marketed as much less power hungry than a lot of head candy on the market [which they are]). With the FiiO E5, which Fang said was all the power I would really need to get the best sound (false), they were a little weak, and even though they can be powered from the line out of my MacBook Pro, its not that grand of a sound. I'm using FLAC audio files through Cog (Mac) for my source. As for the build quality, the cups feel super durable, and though they're heavy, the very soft leather/foam band sits well on the head. The ear cups get a little itchy after a while, and I kinda wish they included the option to choose a leather cup as I am a bit more fond of them, but the suede ones work nonetheless. The cable is wicked thick and can get in the way at times, but has great sound (after a little burn in). These headphones have changed drastically since I first checked them out (like seriously, burn in is wild, and they require a ton of it. The first 3-4 hours, anything in the low end got pretty well distorted, but these have changed more than any other headphone I have ever owned). After about 120 hours of burn in, the trebs are a little bit lively leaving the bass slightly lacking in weight (at least for me) but the mids are astonishingly transparent. They sound really open which brings an awesomely natural sound in a quiet environment, but when in a rambunctious house, a lot of exterior noise leaks in (even with a decent amount of volume). I've mostly been listening to classical with these, but rock sounds astonishingly good as well. The bass holds up well, vocals are vibrant, and acoustic guitars sound jawdroppingly accurate. As the headphones are open, there is a very wide soundstage which is rather surreal. I haven't had a full burn-in I feel like, and haven't listened quite enough to give my full impressions, but that's a start I guess. Thanks for watching the video (though it was slightly n00bish I know), and I'm excited to become a part of the head-fi community.
--Quinn