He isn't in So.Cal. but I think one of the best, if not the best, and by far most reasonable is Terry Dewick for vintage McIntosh gear. I believe he lives in Tennessee and can easily be found with a google search. I would at least call and talk to him before you decide on who you wanna use. I know that is who I will send mine to if it needs help.
McIntosh repairs - who?
Looking for the best vintage McIntosh upgrade/repair tech in the Southern California area. Thanks in advance for your referrals. Ralph