My new practice headphones are a strange combination. Oppo headphone amp that takes inputs from printer out cables, speaker out cables, you name it, it can hook up to it. Bought a set of HighFiMan cans. About $2,600 to $2,800 for the pair. Wow, No matter what source you run it them, they are just celestial in their headroom, ambiance, and plain old great sound. I likes em, and recommends them. I ain't portable much these days, so why would I expect my headphones to be??? I hear/read HiFiMan put out a new pair for $3K that are a micron better - An extra $1,700 for better enough that my old ears would one notice a $100 improvement. Save that pair for the rich yuppie kids . . . I used to like high-end Grados, but hey they suck now, in comparison.