surprise me still few people have mentioned this pair of headphones, since 1A, MSR7, MOMENTUN almost dominate current portable headphones market. i purchased HD10 on 150 dollors 5 months ago. meanwhile, i tried MSR7, 1A. My conclusion is HD10's much better than them if you test them with...

X1 really surprise me, since Philips didn't make one cans convincing in sound as far as I knew. I purchase one pair at discount under 150 dollars. However I believe x1 should stand by any serious headphones around 400 dollar even more. To make x1 perform decent, you need to buy them a good cord...