No. I have two systems so I swap things out and spend more time with components in the chain before making a decision. Listening fatigue takes a while to set in and over a wide variety of music. I’ve tried blind tests before and it doesn’t work for me. However, when one amp starts grating on me after a few hours of listening, that tells me much more than a blind test will in a few minutes. That’s how I do it and it works for me. My personal opinion is that I need to live with something in my system for a while and listen over a wide variety of music to assess how i like it. Please remember that for me, measurements are not paramount. It might be for you and that’s fine by me. Long term listening pleasure is my benchmark.