Weights for Tuning Enclosure Vibrations

Megasam, for $27.00 you cannot possibly go wrong, and I agree with Guy about the material. Brass is non magnetic and nearly as free of resonance as lead.

As for the Mpingo, I have not tried them, but witnessed a demo at CES some years ago where the discs were moved from the "good" spot to a "bad" spot. The results were amazing, although I have absolutely no explanation for it.

Maybe these Mpingo guys are just super tweaks and play until they make something work.

Albert:
Your is a very brief rule of thumb for any tweak!!!! I do follow same reasoning for many things I do try in my system, as always be aware about how sound changes, different is not necessarily better let your ears and your taste be the judge
Luis

Super DH (diamond hard) Cones on speakers and equipment are quite startling, Golden Sound Acoustic discs have many uses, not only in room corners - e.g., TV chassis, windows. I think everything's's relative; we have found lead is not very good, in fact terrible, in many cases, brass is better but not as good as some other materials - the NASA grade ceramic of DH Cones to name one, depends on where you are at, so to speak, it would stick with materials that are very hard as opposed to soft or pliant.