Then why not sit on the f***in' thing? Be my guest.
"Resonance" is one of the most used and abused terms in audio. Like I said in reply to Raul, the theoretical advantages of record dampening are obvious. I only know that when I do it using the available mechanisms, most of the time I do not like it. So I don't do it. (Most of the time.) Same goes for hitting myself in the head with a hammer. I could counter with some equally hypothetical arguments about why record weights might not be so good, but I believe we are speaking past each other (plural), and it would only lead to more misunderstanding. The OP asked about platter mats, and I have offered my opinions.
"Resonance" is one of the most used and abused terms in audio. Like I said in reply to Raul, the theoretical advantages of record dampening are obvious. I only know that when I do it using the available mechanisms, most of the time I do not like it. So I don't do it. (Most of the time.) Same goes for hitting myself in the head with a hammer. I could counter with some equally hypothetical arguments about why record weights might not be so good, but I believe we are speaking past each other (plural), and it would only lead to more misunderstanding. The OP asked about platter mats, and I have offered my opinions.