tt isolation help

SYMPOSIUM or SRA SILENT RUNNING im using SYMPOSIUM ULRA WITH RAVEN AC1 works great.

Trip, The springs are McMaster-Carr P/N 96485K125. They are 1-15/16”D x 4”L and use .148” diameter wire ground flat at the ends. They compress 23.7lbs/inch, up to a total deflection of 2.88”. So a 50lb load compresses each spring about half way down and leaves .88” of unused travel before the spring binds. I use six of these underneath a heavy sandbox. The springs can be moved around to level the TT.

I found the Audio Technica AT605 feet to be well-adapted to my Linn LP12. They are large enough to fit the corners of the plinth well, they compress enough but not too much, they handle both vertical and horizontal vibrations and they are easily height-adjustable. They cleaned up the sound for me a lot, even though I had the TT on a Target wall shelf. These feet are hard to find because they are not made any more, but they do come up from time to time.

This reminds me that I have an old set of Audio Technica spring footers as well. They are better suited than the McMaster-Carr springs to being placed directly under a component. The MC springs work best when mass-loaded by placing a heavy plinth layer beneath the component and the springs. This ensures that the springs work at a very low frequency and do not ring.