“ Check out the thread & review here as well: http://www.head-fi.org/t/604971/the-starkey-hf-2-thread-affordable-custom-iem-for-your-phone Intro Not long ago Starkey launched their canal-sized custom in-ear monitor HF-2. I've been lucky enough to get to review it and share my thoughts with the rest of the Head-Fi community. The Starkey HF-2 utilizes a 2-way...” --Staal
Single dynamic driver in-ear by Korean micro-speaker company called Dynamic Motion.
General Info Taken From Starkey: Proprietary precision-balanced armatures Dual low, single mid, single high Integrated 3-way crossover Noise isolation -30dB Frequency response: 30-18000 Hz Input sensitivity: 104dB Impedance: 50Ohms Price: $1,048,00 + Shipping 2-year warranty on parts & labor Review: http://www.head-fi.org/forum/thread/494930/review-starkey-sa-43-jh-13-pro-jh-16-pro