The BS1 Official is a full-bodied sounding earbud that packs a high level of details retrieval with a smooth approach. It is able to provide an intimate and detailed sound. The stage is very immersive and gives a surround feel. The build quality of the earbud is constructed well. Furthermore, the 8 core hybrid cable is braided nicely with beautiful parts being used and it is aesthetically pleasing. The Penon BS1 Official is easily one of the finest earbud I have come across.