Thanks for all your help guys, and the replies. I managed to fix the problem from the speakers... bought a new sound card for a nice sound, and sent the woofer to a repair shop someone told me it was really good and they did something to thingamabob and now the speakers sound properly.
Unfortunately I have no idea what I did, but the radio waves are back, and it's driving me crazy... I can't seem to be able to fix it back, I don't know what happened, seems the shielded wires aren't enough or I broke them or they got contaminated with the crappy thin wires (I only had center, left and right with shielded wires because the shielded wire is so expensive, so I plugged the surround speakers because I thought maybe the shielded wires would be enough to clear the radio waves). Before, the center, left and right speakers didn't pick up radio waves, but now they do, even with shielded wire... what can I do to get rid of radio? give the wires, woofer and speakers a nice tinfoil hat? :O (The surround back speakers are not plugged in, and the regular wire is not plugged either).
I know there's a material that absorbs radio, but I don't know the name or where to get it. Is there something homemade I can do?