Hi guys. Can I have your opinion between these two IEMs; JVC HA-FXD80 & Yamaha EPH-100. I heard Yamaha got a better bass which I like but I don't like a weak treble so good clarity and treble is also important to me. Is Yamaha's treble any good? I went down to audio shop which sells Yamaha but they told me they dont have the demo unit so I dont have a chance to try it.

My rig; Sony Xperia
What type of usage: Music
File format used in my source: MP3
Genre of music I listen to:Rock, Pop, Electronic, Movie Soundtrack, Opera, Symphony
Headphone/ earphone type IEM