Yep, I've actually got the previous model to that system in my room. I have a 3.5mm Audio jack -> dual RCA jacks running into the RCA -> component sound adaptor that came with the speakers. I find that I get brilliant sound. But remember, the less adaptors and cables, the better. There's less room for quality loss.
Logitech and quality don't really mix, added to the fact it's a laptop's onboard sound chip.. :P
But whatever, godspeed.