Sony NAS-E300HD Audio Shelf System

Hello, can anyone tell me if I can use my PC as a player and a Sony NAS-E300HD Audio Shelf System as an amplifier.
The Sony has a DMPORT, is this a Digital Music Port? If it is do you know what cable I would need and where can I buy one?
Thanks in advance.
 
Thanks for your reply but there's a bay and port of the top for an ipod. I did figure it out and got it working with 4 speakers controlled through my PC. I have to say I am disappointed with the results though, the sound is crystal clear and it's more than loud enough but there's more volume coming from the 'back' speakers than the front and there's no way to adjust it.