The LD Systems BM1 Boundary Layer Microphone features a unique hemispherical pickup pattern which makes it ideal for use recording pianos live theatre or conference audio. The flat floor mounted design eliminates unwanted reflections from the floor preventing phase issues and providing a very smooth frequency response. The 50 Hz – 20 kHz frequency response offers superb speech intelligibility making the boundary microphone useful for conferences or corporate events. About LD Systems LD Systems have quickly become a leading pro audio brand in only a decade of business. They have an extensive range of state-of-the-art products and continue to innovate finding new ways to improve the possibilities of sonic performance and value. They provide an extensive range of accessories to protect and expand the applications of their products. Features Hemispherical polar pattern is perfect for piano recording theatre and conference applications 50 – 20000 Hz frequency response Floor or table based design eliminates surface reflections and comb filter effects Specifications Product Type: Microphones Type: Installations Frequency Response: 50 – 20000 Hz Directivity: Half Ball Nominal Impedance: 250 Ohm(s) Max. SPL: (1 THD at 1kHz): 135 dB Phantom Power Requirements: 48 V Microphone Input: XLR (3-pin) Width: 27 mm Height: 74.5 mm Diameter: 93.5 mm Accessories (Included): Cables (Mini-XLR / XLR 6 m) Weight: 0.345 kg