I use Minus K under my turntable and tube amps, they work well, no pumps and hoses to deal with, just science. I think they have a new model which is thinner in profile, yet does as good a job as the taller units such as I have. My Turntable is a Technics SP-10MK2 with an OMA plinth, it weights 200 pounds.
I live in a wood framed building, wood suspended floor, it was impossible to play records before the Minus K because of the feedback issues. I tried granite + sandbox to no avail.
I live in a wood framed building, wood suspended floor, it was impossible to play records before the Minus K because of the feedback issues. I tried granite + sandbox to no avail.