I've been using these springs under my maple block/VPI deck for several weeks now. My Classic TT is coupled to the block with EdenSound footers. Although I won't make any claims of new found audio nirvana, the isolation provided by these springs is legit. I'm sure there were changes but I've made a lot of upgrades over the last 60 days (including new Ayre and Pass Labs electronics). I was using anti-vibration pads under my maple block before adding the springs. When the needle was in the groove, I could whack the shelf below and hear audible thumping. Didn't take much at all for this vibration to make it's way up into the turntable. With the springs, I can hear a very faint thump but I have to hit the shelf HARD and the volume has to be up very loud. Much harder and louder than the setup will ever see under normal listening circumstances.
Springs under turntable
I picked up a set of springs for $35 on Amazon. I intended to use them under a preamp but one thing led to another and I tried them under the turntable. Now, this is no mean feat. It’s a Garrard 401 in a 60pound 50mm slate plinth. The spring device is interesting. It’s sold under the Nobsound brand and is made up of two 45mm wide solid billets of aluminum endcaps with recesses to fit up to seven small springs. It’s very well made. You can add or remove springs depending on the weight distribution. I had to do this with a level and it only took a few minutes. They look good. I did not fit them for floor isolation as I have concrete. I played a few tracks before fitting, and played the same tracks after fitting. Improvement in bass definition, speed, air, inner detail, more space around instruments, nicer timbre and color. Pleasant surprise for little money.