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MP221 Microphone preamp

This product has been superseded by built in features in Ampetronic hearing loop drivers.

For more information please contact us on +44 (0) 1636 610062

Product Code:
MP221 – obsolete

  • Features
  • Specifications
  • Standards
  • Downloads
    • Switchable phantom power
    • Independent controls for all inputs
    • 5 year warranty
    • Power supply included
    • 2 Balanced microphone inputs
    • 1 Balanced/Unbalanced line input
    • 1 Stereo Unbalanced line input
    • 1 Balanced/Unbalanced line output
  • Balanced Microphone Inputs

    Gain (Factory setting)66dB
    Gain switch(low) 46dB
    Input referred noise-124dBu (200Ω source)
    Input impedance> 5kΩ
    Phantom Power+12V

    Line Level Input 1 Unbalanced Stereo

    ConnectorDual phono
    Input Impedence47k Ω

    Line-level Input 2 Balanced / Unbalanced

    Connector(1/4 inch) 6.3 mm jack socket
    Input impedance1MΩ each side, 2MΩ differential


    Connector(¼ inch) 6.3mm Jack socket
    Number1 Balanced/Unbalanced
    Level0dBu (nominal)
    Overload+16dBu Bal / +10 dBu Unbal
    Overload LEDOn front panel


    Gain Control4 (1 per input) on front panel
    PhantomGlobal ON/OFF on rear panel
    Gain BoostInternally selectable per channel


    Width, Depth, Height107 x 200 x 44mm

    Power Supply

    Voltage, Current12Vdc, 55mA (region specific power supply included)


    The unit can be rack mounted using the RM-1U rack tray, BPS-1U and BPL-1U blank plates.

  • The MP221 preamplifier is CE marked to all relevant safety and EMC standards

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