2-wire amplifier for dynamic microphones


  • Universal preamplifier for dynamic microphones
  • Amplification adjustable with parallel resistors
  • Potentiometer for adjusting the output voltage


  • 3-wire version with potentiometer (V857-5)
  • Preconfigured amplification levels

Application range

  • For dynamic microphones with slot for amplifiers

Scope of delivery

  • Amplifier circuit board
  • Connecting diagram


DimensionsHeight 5.5 mm, Width 26.3 mm, Depth 19.2 mm
Weight2 g (0.01 oz)
Connectionsolder pads
Storage temperature-40 °C to +105 °C (-40 °F to +221 °F)
Operating temperature0 °C to 70 °C (32 °F to 158 °F) 
2-wire operating voltage8 V to 30 V (DC)
3-wire operating voltage8 V to 30 V (DC)
Frequency range50 Hz to 10 kHz at -10 dB
Amplificationup to 54 dB