PURON DOUBLE BLIND A/B TESTS
I got my Puron in the mail yesterday, and did the first tests. I asked my wife to sit down and listen to tell me what she thinks. I started off without it, and played a song she knows pretty well. I turned my back so she could not see whether I was adding or removing the Puron, and did my best to prevent her from being able to tell if I was adding or removing it. I played 30 seconds without it, and she said, "OK." Then I played 30 seconds again without it, and she said, "Yeah, OK." Then I plugged it in cold for the first time, with no burn-in at all, and she immediately said, "Oh, Oh! That one is better." In all, with my randomized A or B tests, she consistently picked the Puron for better sound, identifying 5/5 correctly in this session. She commented that my system sounds "more like it is supposed to sound," and "more real."
Guessing five out of five correctly in a double-blind test is not enough to be statistically significant. We will have to do four more sets for a total of 25 samples minimum to get to statistical certainty. Also, the findings studying one person on one stereo are not enough to make a predictive model about the entire population, each with different stereos. However, she only had a 3.125% chance of guessing correctly five out of five times. But, that can happen, so... more tests needed before I can confirm with sufficient certainty.
I let it burn-in for a day and I did my own first listening tonight and could immediately tell that my system has a different sound. I could hear a lot more information, a lot more easily. This was not a subtle change at all. I liked it almost as soon as I sat down to begin listening. It was easier to follow the melody, and easier to hear the instruments.
So, statistically speaking, my wife can say that she is 96.875% certain that she prefers the sound of the Puron in my system. I can say that I like it too. I will report later what the rest of her listening tests show, but I think I will probably text Mark right now and order a second one. Definately worth $250.