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Alfatron PA2B

The ALF-PA2B is a compact-sized digital amplifier (Class-D) with 3 inputs (2 lines in and 1 balanced MIC). It is integrated with powerful functions, including bridge connection, dual-mono, EQ control, microphone mixer etc. It is a good application in different spaces, including classrooms, small meeting rooms, lecture halls, bars, pubs, etc.


Product Features

  • 2 x 20 Watt @ 4 0hm as the default amplifier output
  • Bridge connection function. User can switch the PA2B to be 1 x 40 Watt @ 8 0hm by bridge connection
  • Two stereo audio inputs, switchable by panel button, IR remote and RS232
  • Volume / Base / Treble controllable by panel buttons IR remote and RS232
  • MIC port can support balanced/unbalanced signal, suppresses the external noise effectively. Line audio output via 3.5mm jack, with controllable volume
  • Dual-mono up the stereo audio to two times mono audio. MIC mixer function
  • The microphone will be mixed to the line audio output, and be controlled separately
  • MIC input supports 48V phantom power, dynamic MIC and Wireless MIC
  • Auto noise gate. Keeps detecting the audio and MIC input, will mute the output when there is no input
  • Ultra low inrush current, no need for power sequencing and this allows multiple PA2B to be powered on simultaneously without overloading power circuits
  • Convection cooled, a fan is not needed
  • Anti-static case design: providing good protection for long-term and stable performance

Additional information

Dimensions 8.7 × 12.3 × 4 cm


User Manual