![]() ![]() There are a plethora of other devices that can also get in on the act. Worse - speakers normally have significant separation from each other, so each one creates a separate ground loop.Īdd to that a noisy PC with powerfull energy chomping graphics card and you've a recipe for stray magnetic fields getting into a loop and causing ground noise - even if there is no PC, mains wiring run <1mm from the earth wire can easily induce mains hum into the loop. Even when the power leads are run back to the same power strip, we are still left with a significant ground loop from the preamp (whatever form that takes) via RCA to the speakers then back to a common earth via the power cord. These are often placed around the room (especially subs) and may be connected to separate power sockets. Things have changed - more and more often people are incorporating powered speakers and powered subs into the mix. Unbalanced connections were fine in these typical consumer applications, with very little scope for creating a problematic ground loop. The only part of the system that was remote would be passive speakers - which being passive have no ground reference. ![]() Everything was connected with short RCA leads and everything was plugged into the same power socket. I've thought a little about why in 40 years of owning audio kit, I've never had a problem:īack in the day a "HIFI" was typically a stack of Amp, Tape Dec, Tuner, CD player etc perhaps with a turntable on top. In a majority of cases I've seen, these have involved powered speakers (either mains or subs) being connected with unbalanced connections. I've seen a lot of question recently on how to solve ground loop noise problems. ![]()
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