I posted this on another forum. Elizabeth in private chat is very amiable. I don't know why she doesn't want to try an E-Mat for free.
To others: I've tried the thickest, heaviest magnetic kitchen mats and they do zilch, nothing, nada to the sound or picture. Go ahead and experiment as I did. It cost me bupkis to try a half dozen. One E-Mat on the main power panel-wow! Try it, I recommend it (instead of TC at half the price) as it is refundable/returnable.
It is not transformative in my system with even a dozen mats. It is comparable to adding two pairs of Hallographs or superior cabling, or even superior speakers. It is additive to my system's already great sound (well, very good without the mats). That's without TC, just the mats. On the high end big screen TV, it is also additive to both picture and sound, not transformative. Much more enjoyable.