Rsbeck and Eldartford, I am a social scientist with many published research reports. I firmly believe in test hypotheses with data. I know full-well that the mind can be fooled. I do not believe, however, that science can settle the issues of whether there are differences between amp, cables, with and without isolation, or whether the IC works. I feel no need to prove what I hear nor do I think the rigor or research designs in tests I have seen and even participated in allows conclusions that some might want to make. I merely report my observations, which are the basis of inductive theory development. When I have my science hat on, I want data to assess the hypothesis, but here all I want to know is whether my sound improves.
I am certainly not discouraging others from reaching other conclusions, but I very much resent notions that I am merely deluding myself. When others share my impressions, I feel more secure in my impressions. Guys this is a hobby not competitive football or finding a cure to cancer.