The SHURE's BETA91A is a half-cardioid condenser boundary microphone captures the actual punch of a kick drum without taking up a lot of stage space. In reality, the Beta 91A excels at picking up a wide range of low-frequency instruments; its response is designed for bass frequencies. This condenser microphone's inbuilt preamp makes it an extremely practical condenser, and its ability to handle high SPLs ensures that it can be used in any situation (even with the loudest live drummers). Users may choose between a flat response and a low-mid-scooped punchy response with a two-position contour switch.