anyone?

Hey, i recently got myself a zune and signed up for that 14 day free pass for the market place. Anyways, When my zune is connected to the PC and i have the marketplace window up, It has a picture of your zune in the top right corner, and it says how much space is free. Well anyway theres the...

do the HD 555 require an amp to sound good? i read that they dont NEED it.. but will they still sound amazing withought an amp?