Neumann KK 143 NI Wide Cardioid Capsule for KM A or KM D (Nickel)KK capsule heads are part of the variable miniature microphone system. Together with the KM D (nx) or KM A (nx) output stages, the KK capsule heads form a complete microphone. KK 184 (nx) + KM D (nx) = KM 184 D (nx) or KK 184 (nx) + KM A (nx) = KM 184 A (nx). KK 143 is a pressure gradient transducer with wide angle cardioid characteristic. Attenuation: 4 dB at 90, 8 dB at 135, and 11 dB at 180. The frequency response for sound sources within an angle