When I get 60hz hum from passive speakers, it's when it's connected to the power amplifier and nothing else, only linked by speaker cable. For powered speakers, it's connected to the wall AC outlet, ...
I tested out a used High Fidelity X-Can v2 tube headphone amp at a local high end audio store. I tried it there and it was extremely impressive hooked up to some quality CD Player. There wasn't even ...
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