Resonance control has a very noticeable impact on music presentation.
I use it under the rack, under components in the streaming path and under the tube amp. In the streaming path, the level of resonance control goes up, the closer the signal gets to the streamer. Using these devices for streaming is counter–intuitive. But I have learned, that improving the physical layer of the network (which includes the power going into all devices) yields great results. Get power, filtering, the electrical representation of traffic and resonance control right and streaming becomes amazing–better than any CD player can become. Seriously.
Heavy, well built components like my dCS gear and the JMF power filter do not benefit from further measures beyond being on the rack which has resonance control footers underneath its spikes.
You might want to look into
Ansuz Darkz. They come in levels, which have progressively higher impact. Employing them in a system is like tuning a piano. Apply too many or too high a level and things go south. Up to that point, music becomes more right, micro timing improves, the listening experience becomes richer. The effects are profound and I would not live without them. In my experience, they make sense up to T2S, not higher. Three is the right number for a component.
PS. My system is still settling in, so I will write in re cables when things are perfect. I already know, that I have found the right combination of Luna cables for power and RCA plus Network Acoustics for streaming and USB. The system unfolds its synergy and I get what I am looking for when sitting down and listening to music.