Alfatron Electronics PA2B 2x20W Low Impedance Mixer Amplifier

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 has a good application in different places, including classroom, small meeting room, lecture hall, bar, pub etc.

Alfatron Electronics PA2B Features

• 2 x 20 Watt@40hm as the default amplifier output
• Bridge connection function. User can switch the PA2B to be 1 x 40Watt@80hm by bridge connection
• Two stereo audio inputs, switchable by button, IR remote & RS232
• Volume/Base/Treble controllable by buttons IR remote & RS232
• MIC port can support balance/unbalance signal, suppress the external noise effectively
• Line audio output at 3.5mm jack, with volume controllable
• 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. It 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, the fan is not needed
• Anti-static case design: providing good protection for long-term and stable performance

• PA2B 2x20W Low Impedance Mini Mixer Amplifier1

• Audio Input
  • Input: 2 stereo audio, 1 MIC
  • Input Connector
    • 2 RCA
    • 1 3.5mm jack
    • 1 pluggable terminal block (3P,3.81mm)
  • Input Impedance: >10KΩ
• Audio Output
  • Output: 1 amplifier, 1 stereo audio
  • Output Connector
    • 1 3.5mm jack
    • 1 pluggable terminal block (4P, 5.08mm)
  • Output Impedance: 50Ω/stereo, 4~8Ω/Amplifier
• Audio General
  • Frequency Response: 20Hz ~ 20KHz CMRR >70dB@20Hz~20KHz
  • SNR: 80dB at maximum output
  • Bandwidth: 20Hz ~ 25KHz
  • Stereo Channel Separation: >75dB@20Hz to 20KHz
  • THD + Noise: 1%@1KHz, 0.3%@20KHz at nominal level
  • Voltage Gain: 32dB
  • Power Output: 2×20 Watts (4 Ohms)
• Control Function
  • RS232 Control: 3-hole phoenix connector
  • Panel Control: Optional button control
  • IR Remote: Optional IR remote