Balanced Audio head-phone amplifier ( Balanced audio monitor)

Useful audio device for audio professionals, tiny board is a balanced headphone monitor, based on BA4560 op-amp, project works with 12V DC supply, Female XLR connector helps to feed balanced audio input, male XLR connector for parallel balanced signal output, and 3.5MM Stereo EP socket provided to connect headphone, easy supply input using standard DC socket, onboard potentiometer provided to adjust the gain.


  • Supply 12V DC
  • DC Socket for Supply Input Or CN4 Header Connector
  • 3.5MM EP Socket for Headphone
  • Load: 32 Ohms Headphone
  • XLR Female: Balanced Audio Signal Input
  • XLR Male: Balanced Audio Output
  • D1 Power LED


  • C1, C2 10uF/25V Bipolar Capacitors,
  • C11 220uF/16V , C10 470uF/16V, C1,C2 40uF/25V  Electrolytic Capacitors
  • All Other Capacitors and Resistors SMD 0805
  • IC BA4560 SMD SO8

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