Just heard back from my Meridian dealer. He has changed his mind. He no longer thinks the Pass amp is causing the problem, which seems to be the nearly unanimous opinion here.
I will be sending the unit back to Meridian America for diagnosis and repair - the second repair for what is likely the same problem. Unfortunately, the unit is out of warranty. :-(
I will be sending the unit back to Meridian America for diagnosis and repair - the second repair for what is likely the same problem. Unfortunately, the unit is out of warranty. :-(