u/Impossible-Many-8016

Why does my voltage regulator slowly increase voltage, even after adjusting it down it will slowly creep up

I have a ct sounds 1000 watt peak amp connected to a Rockford Fosgate 12” p3 and I’m having over heating issue due to the the wire ends having a bad connection in the amp. I’m wondering if there is special lugs to connect or other types of wire ends. Also thinking about soldering the wire end to give it rigidity. My issue is the rattling is loosening the connection and if I tighten it too much then it frays the end of the wire and causes a bad connection. I’m using awg 4 btw.