What has changed? The Bybee Quantum Clarifiers attached to the Klipsch Mid horn magnets causes the following improvements....Each instrument stands clearer as its own thing without losing the cohesiveness of the overall presentation. Everything is just plainly cleaner and more real sounding, like tone of drums, organs, voices, all very surprisingly better. The bass seems additionally defined and enhanced realism with bass drums. Channel separation is better, sound stage is wider, and the occasional tunnel effect I was hearing is smoothed out to a more legitimate 3-D back and forth, front and rear enveloping experience. Often heard LP's and CD's will shock as they reveal significant details once veiled in a murky blur. No, really, I'm kinda shocked at the improvements. Try them and let us know if you can label them snake oil?! I love em