Feedback issues
I am glad I listened for five straight months without disconnecting the TU-8900's feedback. During that time, I never forgot the feedback was connected, but everything sounded so alive and energized that I never felt motivated to remove it—never, that is, until I began to write this report. When I finally took the feedback out, I was surprised how much rawer the sound became. Without feedback, a deep-and-silent, wet-look transparency appeared. The amp actually got quieter into my 97dB/2.83V/m– sensitive Heretic AD614s.
I found these new, raw, uncorrected…