I got a sub and amp installed at best buy. Kenwood kac5001ps amp and a kicker comp s 4ohm sub. My sub was damaged and found a kicker comp vr dvc. I hooked it up parallel. Hooked the amp up to the solid side on the sub. Tried it out.... I sounded great! Then I started smelling something burning. Opened the trunk and it was coming from there. Cut it off. What did I do wrong? How can I wire this up correctly? Thanks!