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.
Weights for Tuning Enclosure Vibrations
Any members using Mapleshade brass heavyhats, Shun Mook Mpingo, Walker or any similar devices you place on top of chassis to dampen or tune vibrations. What do you recommend as offering a noticeable improvement, and how do you use them in your system? The Mapleshade heavyhats are cheap enough to play around with, anyone try these?