Hi, My amp seems to be overdriving my speakers even though I have meticulously setup the amy and it's 20 watts less then the power of my speakers. I suspect that if it is turned up it causes clipping? The question I have is - CAn this be repaired? How much would it cost Is it best to ditch this and get a new one Is there any way I can test this before blowing my speakers? The Amp is a Marantz sr4300, if I was to sell how much do you think I could get? Thanks in advance.