@x RELIC x: K553 + X3 is a much better combo! I'm not getting as dynamic a sound as I got with my desktop amp. K553 still sound a bit too intimate, but you're spot on about the HW Bass/Treble controls making a big difference. I pushed the bass up to +5, and they sound much more passable. Still not sure I'd want something like K553 for portable usage, but at least it sounds decent.
4/27/15 at 8:42pm