I tried running my stand-alone subwoofer from my motherboard sound connectors without any luck. I then purchased a sound blaster Z PCI card and still am unable to get my subwoofer to respond. It is connected through the Center/subwoofer connection on the soundcard. The computer wants to treat it as a center channel speaker. When I turn off the center channel option in the sound blaster software it turns the speaker off. The subwoofer software option will not work. My subwoofer is a powered stand-alone unit that is not connected to my front and left speakers in any way. I want to run 2.1. Thanks.