So I recently got the Beyerdynamic DT990 250 Pro headphones and I've been reading a lot about them since I'm new to the higher-end world of audio.  I've seen a lot of people suggesting that others buy sound cards or amps or dacs or something like that.  Like I said, I'm new to this stuff and...

  Hey there!       So I'm new to this forum and new to the higher-end world of audio as well.  Please bare with me while I "noob" my way through this. I've always been a big music/movie/video game enthusiast and had always used basic audio gear for it until recently I decided to purchase...