vibration control

Useful yes but most of the time way over done...just my take.

I use some form of vibration control or tuning under just about every piece of equipment. ( Many times people use the term "vibration control" when the item in question actually just varies resonant frequencies.) As Roxy54 says, they all sound different. Plus, every piece of equipment is different as far as how much vibration control or tuning affects it. My Marantz Sa11S1 is greatly improved by the Boston Audio xl tuneblocks I use, but they make only a slight improvement under my other gear. I also use three maple plinths, one under my turntable, phono stage gain stage, and phono stage power section.

Yes SYMPOSIUM Ultra,Rollerblocks etc the BEST by far..

TMC air isolation platforms under all. Tube line stage,Tube CD player, DVD player, SS Phono, Basis TT, and both A/C regenerators.

If you don't want to drill too deep, a good place to start is by making sure you have solid, non-ringing support for your gear, and then trying Herbies products (start with the simple isolation feet );
http://herbiesaudiolab.net/