Placement of the right material in the right place that has the right mass is crucial. I prefer to use materials that are of similar reactance that have much the same transfer rate and mechanical impedance and are of similar sonic character. Brass and certain grade of steels are my preference.. Soft materials including lead are actually high impedance and will store energy and when placed around or on other materials greatly influence energy flow and therefore character. These soft materials are mutes of sorts and dynamic structure will change. Adjustable material reactance is the key much like tuning a musical instrument.
Dave I would propose to you that you purchase some heavy duty zip lock bags that you fill these with different materials and weight and experiment with the tuning of your cables or chassis. If your try materials that are the same, the size of that material affects their reactive value and you can easily hear this as well. So the material choice could be the right one but it's initial choice of size maybe the wrong one..You have to try a few of the same family to get it most right. This test can be easily changed, compared and repeated and may be fun for only a few but may add value to your broad audio experience. Tom
Dave I would propose to you that you purchase some heavy duty zip lock bags that you fill these with different materials and weight and experiment with the tuning of your cables or chassis. If your try materials that are the same, the size of that material affects their reactive value and you can easily hear this as well. So the material choice could be the right one but it's initial choice of size maybe the wrong one..You have to try a few of the same family to get it most right. This test can be easily changed, compared and repeated and may be fun for only a few but may add value to your broad audio experience. Tom