Funnily why people would claimed a tweak they never have the opportunity to demo as snake oil products . Well , I was fortunately to have all sort of " snake oil tweaks" ie shun mook, synergistic research acoustic art, hifi tuning supreme fuses & many more. When my audio group was introduced by a dealer friend to Mr Stein , who proceeded to tweak my friend system with stein epad + ( most expensive audio per weight basis) , 1/2" sq inch sticker on the tray of a CD player , it was jaw dropping clear improvement . He proceeded to add epad to the MCB, ELCB. Some improvement pretty obvious & some not so. Then he brought out his magic weapon , the stein harmoniser with magic stone & magic diamond . We are sold after the demo. All these demo was done in 1 of the best acoustically treated room in Malaysia ( my opinion only). Few of us ended up buying the Harmoniser , epad ( 1 of my friends bought 30+ pieces ), LP conditioner ( highly recommended if U are playing LP) and super natural footers. There are so many stuff in this hobby that seems to defy logic but somehow it works . Until you try it, these tweaks seems like snake oils to your logical mind. It's a crazy hobby. Enjoy