I just got these speakers in the mail today, and I'm having a little trouble hooking them up. I hooked in the speakers to the sub, and the sub in the power outlet. Then the volume and bass control thing into the back of the sub. Then i tried plugging the volume thing into the headphone jack, but barely any bass comes out of the sub when i play music. So i tried plugging the jack into the other output thing right behind the headphone jack and no music comes out when i play it. So i'm not really sure how to do this. Can anyone help?