i have no problem with the rear back up camera its usually something that come out clean , but the amp why is it on the floor? i actually would've put it on the back of the seat and hid the wires under the fabric of the seat and also ur running power along with the rca's on a 4 channel . thats a no no how else do u think alternator whine gets into the system so easily . the ground i woudl've cleaned paint and gone directly to floor pane or somewhere else thats close enough u want a short ground for any amp at least 18 inchs. also i've found if u dont put a filter inline with the rcas going from car pc to amp u get whine too which is produced by no inline filter on the atx power supply .it's ok i forgive since u guys arent mobile electronics installers :-) i just usually have a gripe on that kinda stuff .power wires should be with power and signal should be with signal sorry for rant .