just run your output on your sound card to the rca jacks input on any amp (even and old one) use the phono input if there is one as they have low signals. Make sure your volume on the computer is off. set the amp to 2:00 and then slowly raise your computer volume until you get the desired level. you can then balance them to where you want and for what you want to control the main volume. the wattage of the speakers are very low so you will blow them easily.