I have had a fusion sub in my car for a while. It was initially installed using the high input converter as the stock head unit for my car did not have an RCA outlet. However I recently purchased a head unit and have connected it with RCA cables. However when I turn on the car the sub makes a loud noise. When I unplug the RCA cables this does not happen.
I have no idea what to do.
I have no idea what to do.