Earphones for Wireless Monitor applications. The IE 4 reproduces an outstanding sound quality and high dynamic. It is equipped with exchangeable ear sleeves, which gives an optimum fit to different ear cannels. The results are high isolation against environmental noise as well as a very good bass response.
Universal fit due to exchangeable ear sleeves, available in three different sizes
Natural sound reproduction and dynamic
Extremely robust, even at high sound pressure levels
Outstanding bass response
A good source for foam ear adapters for the majority of Sennheiser ear bud models is a company called Comply Foam (http://www.complyfoam.com/).