The RSM custom in ear monitor is a four-driver, three-way design with 2 woofers, 1 mid-range, and 1 tweeter. It has the power and presence to handle any stage, and the clarity and detail to enjoy while on the bus, plane or easy chair.
“ I am tired of: throwing away earphones, wasting money, and destroying the environment. Ironbuds promised to be an answer to all three - imho they've cracked it. What is surprising is how good they sound. Been waiting a year for Acoustic Forge to release these. I posted in the forums about 8 months ago about them - but Thomas (the CEO) announced they were having some difficulties...” --intelegant