The problem is running your phono input wide open, its similar to microphone feedback. Your hitting the table or arm at the right frequency, it resonates, this goes through the mixer, and system, back into the tonearm or table, and back through the mixer, etc, etc, so, yes, its feedback, very similar to a mic feeding back. And the cartridge starts acting similar to a mic as well, too wide open on the input, and your picking up things right through the needle/cartridge.
Mr. Scott Fitlin
Last edited by clubman5 : 08-22-2006 at 07:53 PM.