Hey guys finished my install, I have power going to a distro block under the driver seat with my JL zr 6.5 crossovers. And the power going to the trunk for the sub amp, and the other lead going over to the passenger seat where I have a alpine pdx 4/100. Not sure where to ground the amp though. I currently have it going to one of the bolts for the rear seat. I did sand down the paint so it does have a good surface but I have noticed the amp cut out twice now, and i have a little whine/engine noise. Where have you all grounded your amps under the seat?