For many years I have been trying all sorts of spikes, cones, rubber pads etc. under my audio equipment. At best this has been unpredictable but often quite expensive. I read about the EVP pads and decided to try the 4” EVPs under my Avantgarde speakers. The effect has been to increase the tunefulness (tone, texture and speed) of the bass whilst reducing room resonances, e.g. doors and objects. The EVP’s are great, easy to install and the measuring level is very useful. I’ve now ordered some of the 2” EVPs to put under my amps and DAC. Many thanks!