I agree that the cartridge could be out of alignment or damaged. The other possibility is that you are experiencing distortion from overloading the MC phono input. Since all circuits overload in various manners, it's possible that the "gargling" sound is a sign of electrical distress from this circuit.
What cartridge are you using and do you know the output level? Can you plug the phono system into the MM inputs if you have them and see what this does? Sean
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What cartridge are you using and do you know the output level? Can you plug the phono system into the MM inputs if you have them and see what this does? Sean
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