Sontronics Sigma, active ribbon microphone, frequencyresponse 20Hz-15kHz, sensitivity 18mV/Pa-38dB+/-1dB (0 dB = 1V/pa @1kHz), pattern: sym figure 8, impedance 150 ohm, self noise: 14 dB(A), SPL max @0,5%THD (1kHz) 135dB, powerconsumption +48V phantompower, +/-4V 5,0mA, incl shockmount and valvet line flight case