This IEM In-Ear Monitor is designed for those who want to build their own custom in-ear monitors. The shell is optimised to accommodate balanced armature speakers, allowing for precise and detailed sound reproduction when combined with the right components. The internal structure is designed to fit configurations with 2-4 speakers and is compatible with sound tubes with an inner diameter of 2mm and an outer diameter of 2.5mm, ensuring an organised and efficient installation of the sound elements. This product is an ideal starting point for DIY enthusiasts and sound engineers striving to create personalised, high-performance IEMs.