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Ground loops and out of phase amps are a nightmare
... unless you know how to fix them.
What you need to know about out of phase amps and noisy ground loops.
Ground loops occur when two or more different ground potentials appear in your guitar rig. They are noisy and hard to get rid of without the right gear.
Maybe you're running stereo amps — the most common occurrence — and one of the amps is at a different ground potential than the other. The result: a loud buzz or 60-cycle hum.
This can happen in any number of cases across different rig types, even with a single amp.
The thing to note - Ground loops are often venue dependent. You might have a quiet rig at home and a noisy rig at a different venue.
You want to be able to fix this quickly and safely by isolating one of the ground paths with an audio transformer, easily done with the junctions listed below.
Out of phase, or really out of polarity, lines make your guitar rig sound thin, a little honky, and typically reduce the low end of your signal — not what you want.
While ground loops are typically venue dependent, polarity issues are often rig dependent. They are easier to predict.
If your amps or lines are inverted by 180 degrees, this is easy to fix with an audio transformer.
Simply hit the 180-degree phase push button on any of the junctions below to invert your audio signal by 180 degrees.
Your sound should now be full, huge, and honk-free.
