Yamaha makes motorcycles, engines for boats, pianos, wind instruments, guitars, basses &... earphones.
My earphones gave way recently so I decided to give the above Yamaha earphones a try. Firtsly, the above product was misrepresented by the packaging & details. The sleeve said the earphones are the asymmetrical type but they are not- they are the stethoscope type which I detest. The manufacturer also promises some of the best concert-grade (whatever this means) audios in your ears with enhanced bass responses but what I hear is the expansion of the background audio leaving the guitar be a thin participant of the music. Thumbs down.