The Pioneer CH3T are an absolute revelation...rich sound and precise bass in earphones the size of a peanut (and driver size is only 5.5mm) ! The build is all metal yet very light - once you put them in, you forget about them. Far better than the weirdly shaped ChiFi IEMs with multiple drivers....proves that there is no match for a well tuned single DD earphone....grab them ASAP !!