From what I understand so far, IEMs in the £1000 + region can effortlessly vastly outperform full sized headphones or even speakers for that matter. But how do the sub 500 compare? i.e W4R & SE535?
i too doubt that , out doing a hd600 is difficult , iems can only dream of that sound stage . and you cant compare iems with full headphones of upper mid range .