got my pair of K7xx a few days ago. since I only have a Fiio X1 and no amp, it sound pretty nice for me. I also tried it on my laptop which has the Conexant 20672. both can drive the cans to a high volume that could do harm to my heardings. Just wondering, with a good amp, how much better it gets? right now, the music I listen to, the soundstage seems still a bit small. so it would be wider with an amp?