By Friday the 8th it was no Ionger working. My first pair of open-back earphones; bought for listening in the room. It?s noticeable but it?s not THAT bad. Need to wash the sweat and grime off? Simply hose them off then wear them in the shower to wash them off with soap. I love em so far! powerful, defined and tight, might even say these have the most satisfactory bass of this group. The ambient is ok, I go from barely hearing to kind of hearing environment. Very impressedUPDATE: the right channel headphone started electrocuting my ear every few seconds. just plug and play. Update may 7 2020.