High quality 15.4MM, using N52 high performance aluminum and iron boron magnets, diaphragm factory in Taiwan, Japan imported film material 12U, special custom 300 ohms ultrafine 8 layer coil, MX500 earphone unit, black design with self-adhesive sound-absorbing cotton, tris frequency performance is very good, very mellow high resistance so that there is no background noise charm 12U makes the human voice more clearly. Each pair speaker has 1 set of shell.
