Although Musical Box Early is a simple hybrid configuration of 1 BA + 1 DD, it is an entry-level Universal In-Ear Monitor that is musical sounding. With earphones, it is difficult to reproduce low frequencies due to the limitation of the shell and driver size. Earphones tend to be inferior in low frequencies, especially in entry-level UIEMs. Musical Box Early makes the low frequency reproduction beyond its class and its made possible by assigning 8 mm dynamic driver to the lower range. Combination of delicate expression of the latest Knowles BA driver and the rich low range dynamic driver, the Musical Box series inherited the good comfort that was a major feature of the Witch Girl series, and focused on the vibration damping characteristics of the earphone shell. For multi-driver earphones in a small enclosure, an unconventional acoustic engineering is required to tune it to perfection. The Musical Box series employs a stainless steel for the faceplate, not only is it physically beautiful but also extremely dense and smooth sound signature.