It's more likely from having an uncommon ground reference. Yes, an ISO transformer should solve the issue.
Subwoofer dual wired hum question
Hello
I have an interesting dilemma. I have a Yaqin tube amp and it doesn't have subwoofer output, so I 'biwire' one et of speaker terminals on the Yaqin and just run speaker wire into the Sub. All good there.
I only use the Yaqin for music. Everything else goes through a Vizio soundbar that has a RCA style sub out. When I run a single, shielded RCA cable from that to Sub, I get a hum.
Yaqin, Vizio, Cable box etc plugged into one output. Sub plugged into different outlet across the room. Cable box has a coaxial isolation transformer.
I did some research - sounds like a common ground loop issue solvable with an isolation transformer. No problem.
But before I order a blue jean iso transformer, I thought I'd check: is the fact that I am running speaker wire from one source and an RCA from another potentially causing the hum?
any help or thoughts appreciated.
I have an interesting dilemma. I have a Yaqin tube amp and it doesn't have subwoofer output, so I 'biwire' one et of speaker terminals on the Yaqin and just run speaker wire into the Sub. All good there.
I only use the Yaqin for music. Everything else goes through a Vizio soundbar that has a RCA style sub out. When I run a single, shielded RCA cable from that to Sub, I get a hum.
Yaqin, Vizio, Cable box etc plugged into one output. Sub plugged into different outlet across the room. Cable box has a coaxial isolation transformer.
I did some research - sounds like a common ground loop issue solvable with an isolation transformer. No problem.
But before I order a blue jean iso transformer, I thought I'd check: is the fact that I am running speaker wire from one source and an RCA from another potentially causing the hum?
any help or thoughts appreciated.
7 responses Add your response
Perfect if your goal is to find yourself right back where you started only with less money and more gear you don't need. That is his specialty. A transformer won't do anything unless everything is plugged into it. Ground loop hum is caused by differential ground which is caused by plugging into different outlets. You don't need an isolation transformer, and it won't help anyway. You just need to connect everything to the same outlet so it all has the same ground potential. |
Well the most practical and elegant solution is to eliminate the AV gear. Whatever made you think you need that stuff in the first place? Believe me, you don't. https://systems.audiogon.com/systems/8367 You will have better sound for movies and music without it. And a better looking room too. |