The Grado is unshielded and will hum in the classic and also in a Rega. Its really a cartridge issue, that's picking up motor hum. If there is a way out of it, Harry will find it.
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.
