The other day while driving, I lowered my volume and when I turned it back up all my bass was gone. When I came home, I asked my dad to check on my sub (12" Alpine Type R) with his ohm meter and everything was fine. The power light on my amp still turns on but no bass comes out of the sub. To get signals to the sub, I tapped my back speaker wires and plugged them into some terminal in the amp. The RCAs also do not work, however they have not been working since I bought the amp. What could be wrong?