i have only had this about 2 months and i bought it used for 900 from a TNESPL buddy of mine and no it has never been repaired and i was suprised today we put the osylicscope on it and the clipping light on the amp is spot on which kind of suprised me lol i think that is how you spell it. also it has 0 gauge inputs for power and ground only downfall is if you want to run 8 gauge like myself for speaker wire you need to make the wire a little smaller because the speaker inputs are about 10 or 12 gauge , also this amp is only stable down to .7 you cannot go any lower or else it will fry .........i have seen it done.lol.i hope that is enough info