Kanai Seisakusho KaNaDe KaNaDe01under (Set of 4) 2 Sets Audio Insulators Used item. Comes with the original box. No pets, non-smoking environment. We hope that those who understand used items will purchase. KaNaDe's resonance frequency (timbre) is determined by its 13mm thickness, so the thickness cannot be changed. Therefore, it was developed as an under-spacer to be placed underneath KaNaDe01, 03 without removing the original feet, for height adjustment. It is designed to have minimal impact on the sound quality of KaNaDe01, 03. Also, because the four legs are independent, it also functions as a dedicated audio board, reducing reflected sound from the floor. Furthermore, the S/N ratio improves with each layer. Three layers of under provide the highest level of hall tone, creating a sound image that arcs behind the speakers in an orchestra. (If you are seeking the ultimate, please give it a try.)