Thank you for the responses! Unfortunately, I do not know that age of the tubes. I purchased the unit from an authorized dealer as a demo unit. I would imagine the tubes are at least two to three years old. I just don't understand why changing the tubes, and then putting the old tubes back in would effect the sound at all! Any ideas? How do you clean the sockets? Are loss of high frequencies a symptom of aging tubes?
Thanks again for your help!
Thanks again for your help!