+1 hififan! Loose laminations will cause buzzing. Can't be fixed! Loose mounting screws are any easy fix! The OP should take the cover off and check for this. Otherwise pass because ARC will want way too much for a new transformer.
You must have a verified phone number and physical address in order to post in the Audiogon Forums. Please return to Audiogon.com and complete this step. If you have any questions please contact Support.