I initially scoffed at these but then in a bout of liquid courage actually bought a couple. Those SR PHTs really do make a difference when it comes to analog playback. I have the green one on my head shell and the black one at the tonearm pivot point and the difference when they're on versus when they're off is quite noticeable. I have no idea why.
My Favorite Tweaks, What is yours?
My favorite tweak is Puron lowering noise floor of my system. Holostage they open my system more, bigger soundstage , improves layering as well ,and made my system more effortless to listen.