I just installed a nice system in my 04 STi and need to confirm the ground point I used for the amps. I have an amp mounted under each of the front seats and ran a 4ga ground wire from the amp the the right rear seat mount bolt (drivers side). On the passenger side I ran another 4ga ground to the left rear seat mounting bolt. Are these satisfactory ground locations? I am having some static/distortion gremlins. Thinking I might have a ground problem. Any input would be gretly appreciated.