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anyone experiencing hum ? getting hum on left channel.. feeding it via PS Sprout for now (till I get another DAC). was working fine, left it on to burn in for several days.. then started to have a hum on left channel. checked wires - all seems ok. When I plug directly into Sprout, no hum at all.. will try replacing cables at some pint - just curious if anyone else experienced this?
Do you have anything like a WiFi router nearby? Radios can cause noise.
Or any cables running near your RCA cables? Stray EMF can cause noise from other cables.
Often I have to move amps or gear around to see if interference is coming from the mess of cable spaghetti that builds up at times...
did you solve the problem? Mine has hum/hiss at the left channel as well. Would it be due to faulty tube?