SHURE BETA 91A This was given to me by an acquaintance. They said they hardly used it, so the body is like new. The BETA 91A is a half-cardioid condenser boundary microphone. Optimized for low frequencies, it delivers powerful low-end sound and studio-quality sound with excellent attack and punch, even at very high sound pressure levels (SPL). - Uniform half-cardioid polar pattern provides a wide feedback margin and eliminates off-axis sound. - Integrated preamplifier and XLR connector in a precision-machined, unobtrusive design allow for neat wiring and quick, reliable setup. - Wide dynamic range for use in high SPL environments, with frequency response optimized for kick drums and low-frequency sound capture. - 2-position characteristic switch maximizes attack and clarity depending on the application. Selecting the flat characteristic provides a natural sound for many applications. The setting that boosts the mid-low range provides a punchy, powerful low-end with sufficient high-frequency attack. - No external mounting hardware required. ■ Boundary Condenser Microphone ■ Half-cardioid, hemispherical polar pattern * Captures the hemispherical area above the microphone surface. ■ Frequency Response: 20Hz-20kHz ■ Output Impedance: 146Ω ■ Power: Phantom power 11-52V (48V recommended) ■ Output Connector: XLR 3-pin (male) ■ Dimensions/Weight: 95W x 20H x 139Dmm, 470g