altec lansing subwoofer problems

[Radical_ed]

i got this speaker system (221) http://www.alteclansing.com/product_details.asp?pID=221
i cannot control the bass, im not sure how, ive gone into sound setup to try to turn it down a little, the master sound volume, but alas, no success, any suggestions?

 

[Praetor]

What sound card do you have?

 

[Radical_ed]

i think realtek ac97 audio, im all self taught, and well, i guess u could say im new