thanks for everybody that replied!
i'm actually getting kinda confused by what everybody said...sorry, i'm not very good with this. I don't have a button to push or anything like that. I tried to use the neg from one channel and the pos from another channel and it powered the sub but it sounded the same to me...is there a way to test how many watts is comming out? i also tried to connect both pos together and both neg together but that just make a duh duh duh noise....so i guess thats wrong..