Sennheiser IE 4 In-Ear Monitor EarphonesThe IE 4 in ear earphones from Sennheiser provide excellent sound quality and comfort with a wide dynamic range. Theyre designed for applications that require natural, accurate sound reproduction, such as wireless monitoring for live or recorded audio, rehearsals, and more. Boating a robust build, IE 4 earphones can handle high sound pressure levels, delivering an increased bass response that lets you hear a fuller dynamic range. Three sizes of