I have owned the B3 for a week or so now. Usually it´s at this time when i put them in a box and.. Go over to full sized cans. I don´t really see a use for iems more then a quick walk to work. Often comfort and the fiddle with tips to get a good seal is bothersome for my use at home. Still love to buy them though :P
But the B3... It´s such a darn good iem! It does not sound like an iem to me at all. The soundstage is so wide and the sound is so clear and airy that the feeling that you listen to iems is totally gone. The comfort in my ears is ace to and i have no problems getting a very good seal with the large stock tips. I have rolled tips alot but i keep coming back to the stock ones.
The big selling point for me is that the B3 have clarity, detail and sound stage with everything without sounding veil or screechy. I listen to a lot of different genres, mostly metal and prog-rock but also alot of female singer songwriter stuff and blues. Often when i listen to different kinds of gear i find that they suit one genre or another. Let´s take the Piston 2.0 as a comparison.
The Piston is a fun sounding little gem for the price. I use it for when i am on the move. The remote and volume control for android devices is neat! I love it for what it is. But i dont really like to listen to it seriously. It´s not bad sounding but i am tired of all the v-shaped iems you often find. It´s great for when on the move since traffic and other stuff filters out the bass quite alot for me. But for serious listening and even gaming ( they are very good for gaming ) The B3 is just fantastic. It´s has some qualities that i have never heard in an iem. Even more expensive ones. I´ts not tiresome but it has the detail and refinement one might want when taking the time for some quality listening. I absolutely love them!
But they absolutely need an amp. Without, the experience is lost and they just sound flat and underpowered. It´s a very noticeable difference when amped or not.
I use them with my HRT headstreamer with my computer. It would not hurt with more power. But it gets the job done.
Portable rig is an ipod 5.5 gen ( wolfson dac ) with a fiio L9 and the Zigis C-moy. Sounds very good and powerful.
So get on the train!