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Re: "pop" heard when muting Audio Research PH3

, as of late I've noticed a "pop" that can be heard through the speakers when I flip the muting switch back to "operate".<<
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Could be a bad tube. I have a Sonic Frontiers Line One preamp. A while back I experienced the same type of problem as you. When I switched line inputs, or mute, on the preamp I got a popping sound in the right speaker. Also I could here a light scratchy buzz noise in the right speaker. Turned out to be a bad tube. I replaced the bad tube No problem with popping since


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