Ok so my friends was over at my house last night and we were listening to some music. He askes if I will sell my subwoofer for $50 I say sure knowing that I only paid 25 for it the rest I got for free. So today he calles me and says "hey do you want to trade my reciever(a Sansui g-7500) for my sub plus 25 bucks. I say sure knowing that that is an awesome reciever. What I am asking is How good is the Sansui g-7500? I have read somewhere that it is 90w rms per channle. Also he was saying that one of the channles will randomely cut out. How could I fix this?