i-sotec RE reference level speakers using wool plate diaphragm material, have very mature technology standard, like other top brands, Mr. Sauter has its own secrets, commercial secrets to maintain its unique voice. The sound features of the alsot wool paper basin are smooth and natural, consistent with the majority of the fever standard, and there will not be a distinct stimulus in the voice. Because the internal fibers are interwoven, the energy in the transmission process can be absorbed quickly, so the damping characteristics of the paper basin are ideal. In addition, due to the light weight of the paper basin, the energy conversion efficiency is the best performance.