Join Date: Jul 2018
Location: It looks like ML took his ball and went home. :)
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Electrical problems are really tricky to solve. Like you said, someone can be telling you their tales of whoa about how bad a component is, and then you find out that they have a dimmer hooked up to fluorescent lighting in the same room that could be causing all kinds of problems. Each person's case is different, and the components have different methods of shielding that gets rid of most, if not all, of the electrical interference problems. That being said, a cheap AVR could get rid of the noise, while an audiophile grade component happens to detect the noise due to the way the circuitry is designed. I've seen it happen in a lot of cases, but usually the problem is solved by finding a component with shielding that will get rid of a particular electrical interference. All amplifiers and preamplifiers are capable of picking up certain electrical interferences, depending on the users unique situation. Sometimes there is a solution that you just have to stumble upon in order to resolve.
Electrical interference noise is one of the trickiest problems to solve, and nothing is carved in stone as to what needs to be done to remedy the situations. Sometimes it's just trial and error that will remedy the situation, but if you want to practically guarantee an interference, put a lighting circuit in the same room as your sound system, and then hook a rheostat or dimmer up to that circuit. They are on different runs to the main panel, but the switches sometimes house both the lighting circuit wires and the wires that supply the outlets in the room that may share a common wire or a ground, or both.