I have just bought a pair of K7xx headphones and was wondering do I need an amp for it? If so which amp would work well that not to expensive ( about $100 or less, but I can go as high as $150 though I'd rather not). I'm not very good with audio things and really don't wanna take a lot of time to learn it. Just kind of wanna plug and go if you will. Also from what I gathered from watching some youtube videos is that I don't need an DAC, but I could be very wrong.