I have the Sabertooth 990FX Rev 2.0. There's an orange 'c/sub' port among the 6 audio jacks, not sure if that's the one I need. I was considering buying a sound card, but if its not necessary, then I'll leave it.
At the moment I have a set of Creative T40 Series II 2.0 Speakers.
http://uk.creative.com/p/speakers/gigaworks-t40-series-ii
I want to buy and connect an active subwoofer if possible (Yamaha YSTFSW050)...