Is there anyone with an amplifier that has installed a custom autosound head unit in their caddy? I’ve identified a problem with these units when paired with an amplifier. There is a crazy high pitched sound, even when benched tested (it’s not a ground loop issue). I’m trying to convince the manufacturer that they need to look in to this. Here is a video that will help if you want to know what to look for.
If they wont listen, send it back.