Sennheiser MD 509

Acoustical mode of operation: pressure gradient receiver
Frequency response: 50 - 15.000 Hz
Directional characteristics: cardioid
Open circuit output voltage art 1000 Hz: 1.18 mV/PA
Electrical impedance at 1000 Hz: 200 Ohm
Min. load impedance: >200 Ohm
Connector: 3-pin XLR plug
Dimensions in mm: 55 x 34 x 134
Weight: apx. 180 g