Developed and marketed by our independent sister company, Sensaphonics Japan, j-phonic K2 earphones are dual-driver, universal-fit earphones with a wide range of available options. These IEMs are available in two sound signatures, and with a wide range of options. The K2-s, for live stage monitoring, has the same flat response and reference-quality sound signature as our custom 2MAX and 2X-S...
“ http://www.head-fi.org/forum/thread/562428/review-kozee-infinity-x1-custom-molded-iem See above for my in depth review. This really is a good product. The issue is with the company itself. As I mention in the review, they are not returning emails from customers. And when people do manage to track them down on the phone - they make promises that are apparently not kept. I like Kozee...” --project86