Eliminating Troublesome Hum & Buzz Created By Electric Guitars
When you plug your amp and mixer into these separated outlets, and connect the equipment together with a mic cable from a direct box, the difference in ground voltages can make a 60-Hz hum current flow between the guitar amp and mixer. That''s a ground loop. Cure: Flip the ground-lift switch on the direct box to break the loop. Also, it''s …