Building the listening room a long shelf was made to carry my hifi and turntables. At the start I had a few issues with the turntables with loud music which improved when the shelf was loaded with vinyl and other gear and sorbothane footers were added to all turntables problem solved....
Maybe not it seems.. I have my Grado Platinum wood on the Technics sl1200mk2 at the moment (actually waiting for another cart from grado but will post when it arrives..)
I put on some very low bass music and to my surprise it started feeding back.
It was very loud but still a surprise. I removed the turntable lid as this always fixes this issue but it didnt. I placed my hand on the shelf and you could of course feel the bass in the shelf. I then placed my hand on the plinth and to a much lesser extent ,but it was still there. Not a problem with other carts, but maybe the Grado being such high compliance anything that causes instability is going to mess with things. Fix idea is simple just need to get the welder out, I plan to make thick shelf brackets and bolt a strap between the two so a board for the turntable is not needed and turntable is to sit on its footers directly on the thick metal brackets. Any large surface wood mdf etc will pick up vibrations so my thinking is a solid minimalist wall bracket solid though will remove the problem, simply as you are reducing the surface area to catch vibrations. Thinking to make brackets wide enough so that the sorbothane footers can sit it should IMO be very dead indeed. What are your thoughts?
I cant Help wondering if a lot of flack Grado get could be due to this and the angle they like to track at (tail up it seems).
My Technics and other unsuspended turntables sound great, but now cant Help wondering if this wall shelf idea ie without a board to catch musical vibrations could clean up to the next level unsuspended decks??