So prior to me pulling the last amp that i had installed everything sounded great! I just bought a new amplifier and got it going, but when i really start to turn up the volume to get some good deep loud bass i start to get a wierd feed back coming from the subwoofers. I dunno whats going on. On the headunit its max is 40...volume1-20 it sounds fine but then once i start cranking it up to around 28-31 or higher it starts the thumping going on? Any ideas anyone i would greatly appricate the help. I was all excited to get my new amp i just wonder if i have something wrong with the gains and sub sonic.