As of late i've been driving my K550's with a vallhala/bifrost schiit stack. Yep....complete overkill. But for some reason it just sounds so much more full and not as bright. They still have the signature sound from before (with a normal E11/7/17) but it just seems to be more refined and smooth. Then again, the stack is completely out of its league. I guess this is what happens when i get curious. :P
I recently had a e12 I purchased with the k550 but returned it because of volume issues and did not like how it changed the signature sound. The E11 I have does not really work all the time but I liked what I could hear. I was thinking about getting a new E11 or E7k so I could use it with my computer sometimes. Did the two sound vastly different, or were they on par with each other?