So glad to find this thread. I like to know why things work. The formulas provided help. Although I was doing trial and error, I did get good results.
Chronology:
1. Bought 8 Audiocrast springs on Amazon after the majority here like the results of springs. I picked this brand because it had a higher weight capacity. My speakers are 120 lbs each. Results were as someone said, "right", you just know it. Pretty much same as others. Details, transients, weight, just better
2. LIked the results so much i ordered 8 more for my subs. What once sounded like a single note, had more detail, more and a cleaner bass. At the same time I could feel it. Low notes were the biggest surprise.
So I put these under the four speakers and it worked. Wow! That was simple. And Amazon would take them back if I don’t like them.
3. So what about the amp, streamer, DAC, preamp? Springs didn’t seem practical. Some components are too small and light weight. So I ordered a bunch of Herbie’s Tenderfoots. And the sound went backwards. I noticed bright treble. Bass was not as detailed and more carryover(I forget the word to describe it).
So, I am glad that fine tuning is possible. I have one spring under the speaker that is more compressed. Otherwise, not sure what to do but will fiddle around. Have all winter!