Hello, Just obtained a kenwood ka3500. Upon initial testing I have distortion buzz on both channels. Music playing Speaker offset is 9mv 30 mv I removed the case and deoxit all pots and the like and no change. If I turn it up to loud it will cut out. Would this be in the power supply stage as both speakers are effected? I have a dvm, some electronics knowledge (enough to get me in trouble) and a Hakko station. And a service manual not a lot of direction there. Any suggestions on what to test or investigate? Thanks in advance!