Probably a bad tube in the right channel. I would probably look into having it replaced. You might want to contact Signal Path in North Carolina on this.
Popping from right channel of Musical Fidelkw500
I am getting a popping/crackling sound from the right channel connection of a Musical Fidelity KW500. It exhibits this behavior with no source connected. The sound gets louder as the volume is turned up. This behavior is also noticed if I connect the preamp outs to another amp and connect speakers to the other amp. I have tried different speakers and have the same result. Any thoughts on what the problem could be? Thanks
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