PS Audio Noise Harvester. I know it's snake oil but I still bought one! The blue flashing LED did show me which dimmer switches were making the most noise, but made absolutely no difference in the sound of my system. I think Paul invented it for a joke just to see how many suckers he could reel in!
What is the Silliest Accessory You Have Ever Seen.
I was flipping through the accessory pages at the Cable Company and came up with this https://www.thecableco.com/hallograph.html You have to be kidding me. Of all the dumb, idiotic, profoundly stupid things I have ever seen. The marketing is even better! Have you seen anything worse! It is up to us to uncover these things for what they are, SCAMS.
Mike
Mike