NightDrifter05
10+ year member
CarAudio.com Elite
About your ground, you say 2 wires connected by a bolt. Do you mean you used 2 different piece's of wire to make 1 longer ground wire? A friend of mine did something similar by combining two pieces of 4 gauge wire to make his ground reach the battery in the front and he had a turn on pop from hell but when we replaced it with single piece of 4 gauge it went away. I'm not sure if that's how you have your ground done but that might be a weak point if it is.