Even Rotel preamp lines carry exact same unsolved tone control humming issue as well. I had RC-1590 and RC-1572 both have same problem but no further firmware update to address it. I guess nobody cares about 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.