Just purchased a pioneer sx-434 and was happy with it, till it started to mess up. Im new to the vintage recievers so I'm a rookie with the terms. It was working fine for about a hour, then all my speakers started to sound like they had static or cutting out. I detached them and reached them and the same issue. When I turn the balance knob left to right, they don't do it as much but still cut out. When I turn the loudness button off, they cut out, but not as much. Can someone help me here.