I think they have a few patents on these headphones and I freaking love them. I run them through a Hidizs s9 Pro and a balanced cable. A balanced cable made a world of difference man it pushes all 8 drivers to the max, sounds amazing.
They are really good compared to the cheaper iems. The FR gives the illusion of amazing soundstage and technicalities. Once the vocals are pushed back in the mix the details are more prominent.