The EM9 in-ear monitor are a precision five driver design combining four balanced armature drivers with a 10mm dynamic driver. 
 
The combination of multiple drivers ensures the EM9 provide a neutral frequency response, maintaining accuracy and clarity across the entire audio spectrum.
 
In-ear monitors generally have 3D printing shape that help give you an amazing listening experience. The EM9 are no exception, they fit perfectly to your ear canal, sealing off any distracting external noise and enhancing the sound quality. 
You can enjoy the audio with more clarity and safety, as you don’t have to crank up the volume to harmful levels.
 
The shape of the moulding also keeps the in-ear monitors securely in place, even when you are moving around on stage, or wearing them for long periods.