Yeah, sometimes the messing around gets to you and you get tired of it. I had a problem where my 5 ch amp was passing nasty hum to my speakers when turned on and then suddenly went away as volume is increased, man, I went crazy for 2 weeks checking everything lol, it was the amp, which was new, but warranty was up due to installing it 2 years later. I just had to buy another amp and drop all the frustration.