A few years ago I was researching a power conditioner and Google brought me to a detailed online review that was based on all sorts of measurements followed by a detailed explanation of why it could not possibly do what the manufacturer claimed it could do. I went through the review again because I though I had missed the part of the review that told you what effect it had on the sound of his audio system - but the reviewer skipped that seemingly critical aspect of reviewing that audio component. I was somewhat perplexed to say the least. That was my introduction to ASR.