So let me explain my situation I have a 80prs h.u a few weeks back I installed some ft1 tweeters the tweeter fell out of the bracket hit my metal parking brake which I assume caused a short for a few seconds it was a bunch of static and whining then no audio from the mids and highs. I finally got to diagnosing the issue further as I've been busy. Just to note the mids and highs are wired up to a deaf bonce aak 200.4d tonight I got rid of the ft1 tweets they are no longer wired to the amp I decided to test the rca voltage so I put on a 1khz test tone and what I noticed was very strange the 4 channel amp you can hear music coming from the amp like the music is literally playing from inside the amp. Is this a back feed issue? Is the the amp fried at this point? I have all my wire unhooked too aside from the passenger side door as I'm upgrading to a set of b2 audio components once I can figure out this issue. Again tonight I noticed the 4 channel amp the music comes from the amp my sub amp and sub still work just no mids and highs atm the music can be heard coming out of the 4 channel amp very faintly. Any help, opinions or advice would be greatly appreciated thanks in advance.