The SENNHEISER's E901 is a condenser boundary instrument microphone designed for capturing kick drums, bass and Leslie cabinets, as well as other low-frequency sound sources on stage or in the studio. The e 901 has a capsule with an ultra-thin, high-strength diaphragm that provides excellent signal reproduction with low bass response and quick transient impulses without peak distortion. For a clear and present sound, the half-cardioid polar pattern avoids undesired noise and reflections from the mounting surface.