Wayne Parham Messages: 18793 Registered: January 2001
Illuminati (33rd Degree)
I hear you. A few months ago, I went on a spending spree and bought about five different types of each tube for my Audio Note Kit 2. The power supply tube makes a difference in the bass, maybe even more than the output tube. I am guessing it may be due to output impedance but I haven't measured to be sure.