Coincidental to this thread, my set started to show signs of distortion. I tracked the problem down to two preamp Telefunken AU7 tubes past their prime. I sent for replacements, and as a stopgap replaced the Telefunken with Amperex tubes I had handy. The Amperex produced an unpleasant brightness that was unlistenable. Loki to the rescue. With my alternate default setting, the sound bloomed! No compromises, or negative artifacts.
It s a remarkable device.
It s a remarkable device.