Hi
I would suggest reconnecting the speaker wires, paying close attention to make sure no strands of wire are touching across speaker and amp binding posts....then try a different pair of RCA cables between the preamp outputs and amp inputs....if there is still noise try a different cable from the source to the pre also
I would suggest reconnecting the speaker wires, paying close attention to make sure no strands of wire are touching across speaker and amp binding posts....then try a different pair of RCA cables between the preamp outputs and amp inputs....if there is still noise try a different cable from the source to the pre also