Yea I would expect that bass heavy + high volume would lead to distortion at some point on even the best cans. That said, I know these cans are lauded for their bass performance in particular, so I expect them to at least match my LCD-4's without any distortion issues at similar volume levels. I'm sure they can based on all the feedback I've read and watched on the TC's, so the question is simply why aren't they for me right now.
I removed the gain. With NO gain or EQ, single ended input from 2Qute, XLR out on my v281, using this track:
Distortion in the bass starts at about 2 on the dial. Sounds good at like 12, but on this track, it's below my preferred listening level. At my preferred listening level (or well beyond it for testing purposes), the LCD-4's do not distort. Or, I don't hear distortion.
And for clarity, the cans are relatively snug on my noggin, minimal seal break if any at all. The cans are not loose in any way. I know a little loose is considered a recommended way to wear them, but that made them sound even more distorted. Snug fits well and the bass sound great at lower volume levels. It's just once you get to medium or slightly higher listening levels that things start falling apart.
sent you a pm!