Hey guys, I'm the author of that video and I just wanted to clarify a few things regarding the E2 that may have been missed.
1. The crinkle issue is caused by inconsistency in pressure from the seal - which is due to either my beard getting in the way, or where my ear is in relation to my jaw. This causes even the slightest head movement to affect the seal pressure, resulting in the crinkle sound. For anyone wondering, my head is a fairly normal shape, but it may simply not work with the default E2 pads. I don't have this issue with any other mrspeakers headphones. The crinkle issue occurred on both units I tested, so it's also highly unlikely to be a defect. I had multiple people try it, and they didn't have the same issue as me. The bottom line is that while it clearly doesn't work for me (and likely anyone with similar headshape or facial features), it shouldn't be a problem for most people.
2. I really like the E2 apart from that one issue. The sound reminds me of a super HD650, and while my preference is for a super HD600, I think a lot of people will really like this. Moreover, I think the alternate pads will make a substantial difference for improving the treble response closer to my taste. Unfortunately I wasn't able to test them out, but for current or prospective E2 owners, I think you're likely in good hands when it comes to tonality options.
3. Mrspeakers support is absolutely incredible and they're truly wonderful to engage with.