Review on 4PCS Silver Aluminum Speaker Spring Spikes Isolation Stand for HiFi Amplifier, Speaker, Turntable, Player by Nobsound by Jeff Bremmer

I have insulating feet that cost 5 times the price of this product and work no better. I use 4 springs with a base that weighs about 30 pounds. When you tap the surface on which the TT is standing with a small hammer at full volume, no damping is perceptible. I'm not interested in what the toolkit might see. just worried about what i hear. Out of curiosity, I tried them under a powerful subwoofer and the change in output was amazing; A lot of energy was lost through the ground. Really good common sense product at a very reasonable price.