Also have 2 different ground loop interconnects that go between radio and amps to rid noise in radio and a new, never used, alternator noise filter to rid alternator whine from your car radio.
Cleaning out and you can have them for for $7.00 shipping cost.

dnmcduffie@yahoo.com

ship it to whom ever you ship the amp to.

people still using those?
many years ago i learned that if if you keep the power wires speaker wires and rca cables as far away from each other as possible (rout them down seperate sides of the car rca's up the middle) you will have no more noise
and it worked