I recently bought the ath-m50x, im quite happy with it, however the sound quality is a little bit disappointing, it sounds almost the same as my previous headset, a sennheiser pc310, which is about £30. The only improvement I can hear is that the sound is more full, and i can distinguish more easily where the sound is coming from, but that's about it. Does it have a burn in? Do I need a soundcard? Thanks.