Thanks for the info guys. So I guess xb90ex is the alternative to the pioneer at an almost similar price point.
But I will be using it directly through my phones, a note 4 and a iPhone 5s. Sometimes maybe directly through my laptop.
Do we really need an amp for this iem?
Nah, it'll still sound good. You only need an amp to extract the maximum amount of bass from them. Just burn them in for a bit. I thought they sounded pretty mediocre until I had them for a few weeks.