ReMax RM580 Head Phone The microphone proves to be a failure. But also thanks to this Rm 580 pair that I know that I shouldn't talk built in mic for granted. The Remax Rm 580 proves otherwise. The microphone is rather unclear and I've more than 1 person complained about not able to hear me clearly when the mic is not few cm away from my mouth when I'm outdoors. The soundstage is pretty wide and listening to the Diamond Zhang sound I mentioned in my previous reviews proved to be an enjoymenton this head phobne.