@Filter500
Huh, I see. Well, maybe it's the DACs on my devices doing that. As long as the headphones themselves are fine, I'm OK. I'm gonna upgrade my gear anyway, hopefully sooner rather than later, so I hope it won't be an issue after that. Thanks a lot!
@LNuneek
I'm gonna agree with Filter500. You won't be disappointed by thr 58x. I have the MSR7, which are better than the M50x and the M40x at mids and soundstage, even at stock. Modded, they crush both the others. Their soundstage is great, period. When we factor in that they are closed back, it's stupid. But even so, there is always a "wall" , as you say. A few pages back I was talking about it. As big as their soundstage is, it always feels confined to a closed space. On a friend's M40x, the soundstage feels like a very very small room. On the modded MSR7 it feels like a concert hall. It's still a closed space, but it's big. Enter the 58x. They're narrow for an open back, but their soundstage is more natural. It feels effortless, like you're in an open space and sounds happen around you. They're not far away, but they are in no way confined. If anything, it sounds as if the soundstage can extend infinitely, but it doesn't do so by choice. I don't know if that makes any sense, I hope it does.
They are a great headphone, really worth your time and money. And they improve with burn in and with better gear, so even if you are a bit underwhelmed at first, give them (and yourself) time. The only thing you may miss is the bass, the slam and power of it on closed backs, but what you get in return is cleaner, more natural bass. It handles everything like a champ. You won't be disappointed!