THIS UNIT SEEMS TO WORK JUST FINE. I PUT SOUND INTO BOTH INPUTS AND IT CAME OUT OF THE SPEAKER OUTPUT "SCREAMING". THIS THING HAS SOME POWER. 350WATTS INTO 4 OHMS. IT LOOKS TO BE IN GOOD SHAPE. THESE ARE EXPENSIVE, SO IF YOU WANT ONE FOR VERY LITTLE CASH . . . . . .HERE IT IS. IF YOU WAIT TO SEE IF IT SELLS, YOU WON'T GET A SECOND CHANCE AT THIS PRICE