As I remember it, they are standard headphone jacks. But if you have to set the audio card to output in digital, not analog. For example, on my current computer, I can't alter that setting. The audio card changes the signal from digital to analog before sending it to the jack. And these speakers have to have the signal in digital. What I am wondering is if someone who has the board can take a peek in the audio manager and see if they can switch the speaker port from analog to digital output.
If you search the net for 'boston acoustics speakers no sound' you can find discussions of this problem.