So currently I have a fairly cheap head unit, it is the Kenwood KDC-168U. I was going to upgrade but I noticed there is a shortage on microchips so there are not any good, high quality ones around. I have four Kicker CS Series door speakers and a Skar ZVX-12 sub on 2k watts. I can’t figure out a way to get rid of the distorting in my speakers going past 25. They’re brand new and I thought they would fix the original problem of my stock door speakers distorting. My radio equalizer is flat all the way through so my sub can take all the bass. If need be, I will get a new head unit as soon as they come off of back order. Does anybody have any suggestions for what’s going on?