Yes. I use them under my turntable, amps, and preamp. I had used metal spikes under my amps and switched to the Nobsound springs. I wasn’t expecting much. I even thought they might not work. They did improve the sound stage. I guess there were some microphonics I wasn’t aware of before the springs. I placed them under my turntable and there seemed to be some slight improvement. I didn’t notice any changes with my preamp. I’ve left them all in place. No reason to remove them.
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.