New Synergistic Research Record Mat

@lewm- RFI/EMI is all around us, all the time. https://imagine.gsfc.nasa.gov/science/toolbox/emspectrum1.html I’ve never tried crystals for anything in audio, since making a crystal radio as a kid, but- I wouldn’t scoff at the possibilities. ie: https://www.sciencedaily.com/releases/2016/01/160114113524.htm#:~:text=Summary%3A,an%20anisotropic%2... That article refers to a narrow band of electromagnetic radiation (infrared), but there are a multitude of possibilities, given the spectrum of EM frequencies and wide variety of crystals.

"Unless you have tried something or heard it in someone else’s rig how can you legitimately comment on it?"    HEY: that makes SENSE!     This is AudiogoN.                                                               HOW DARE YOU?

@cerrot-     Looking forward to your review/experience, one way or the other.      

Absorption of RFI/EMI has nothing to do with piezo-electrics.    Were one to actually read the references I posted; the posed questions would be addressed.      Of course; comprehension is key!

The tech does open the door for a wide range of possibilities, when it comes to electrodynamics.    Given radio frequencies are part of the EM spectrum; I tend to lump them together.      Perhaps: not that good an idea, when it comes to clarity.                                                              Happy holidays and listening!