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 bought these SOL AMP in-ears at a local TJMaxx store for a reasonable price. The build quality is pretty good and the sound isolation is very good. The sound quality had some issues out of the box. Initially, I found the bass somewhat boomy and not very deep. The midrange sounded boxy. The highs were not as crisp as I like it. If you have ever heard a pair of very large cheap...” --bikdav