UNISIAN E3 Amplifier Board Base On Beyerdynamic A1 Earphone Amplifiers ALPS Potentiometer For Headphone

Discriptions Item name: E3 headphone Amplifier Chips : MC33078 BD139 BD140 Channels: 2.0 Stereo Supply Voltage: AC DUAL 12-18V Working Current: ≥1A Configuration: DIY KIT or Finished Product Impedance：4-600 ohm Dimension: 126*97.3*27mm Weight: 150g Packaging: 1pc E3 Headphone Amplifier board (DIY kits and finished products are optional) Design reference from Beyerdynamic A1 headphone amplifier circuit can drive 25-600Ohm headphone MC33078+BD139+BD140 Transistor DIY kit and finished product are optional Installation example Test data is for reference only If a knob is needed, please submit the order together(Click on the image)