whats your gains set at?
make sure its not out of phase
Edit: things that need to be changed after seeing your video..not flaming, just like, safety reasons.
1. put a grommet on that fire wall penetration, its rubbing bare metal and it WILL short to ground eventually.
2. What is the yellow wire that is also going through firewall. Hopefully not your remote turn on.
3. Why two inline fuses? If amp has none, I understand.
4. Reset the power wire in the inline fuse under the hood, it's fraying and you are just waiting for a short to ground.
5. for aesthetic purposes, please retuck those wires, i understand if you were just wanting to get it hooked up to hear it, but hide wires under carpet. it makes everyone feel better.