Hi, uhh... I'm no expert when it comes to headphones, so I was wondering if I could get some help from someone. I've had one pair of headphones before, that is my plantronics 7.1 (or something close to that) gaming headset, and those are fantastic! The only problem with them is that thet use a usb cord, so I wouldnt be able to use them with anything else but my computer. I am looking for a pair of headphones to use with my mp3 player, and I had a couple of questions to see if this is what im looking for. First off, do these also use a usb? Because if so, the, I don't need to bother with them anymore (which would suck, because I like these). Second, what is this "burning" thing, is that just using them? Like, wearing them in, or something? Finally,do they sound alright without the extra amp? Also, what is that amp? Is it like a subwoofer for headphones? Thanx for the help, and sorry if I bothered you.