10-08-2011, 04:33 PM
An old console might have been designed as a system, take one speaker out and it might not be loaded properly. Have you verified that all the tubes in the amp are in spec? My Dad used to check the tubes in their console about every three years when it started acting up, but that might have been the radio section that was more critical. I have not seen a tube tester in about 15 years. I think they removed the one out of the local Safeway lobby about 1972. :oldfogey: