First I'd like to say I got this amp for $12.24 as non working on eBay when I got it today I connected it up and tried it in bridge mode and it just kept cutting out non stop I could barely turn the radio up barely up to 10 or 12 then it cuts out I checked all wires even the subwoofer it is 4 ohms 500 watts. I had a Punch 55.2 before this and it didn't cut out like this with the same deck. I connected a different source (mp3 player) and it still cut out. Maybe that's why it was sold as non working? But any idea what could be wrong with it? Bad output MOSFET???