This is a class-A amplifier known as ACA or Amp Camp Amp by Nelson Pass. The schematic is original can be easily found on the internet.

Amplifier delivers a clean 4W RMS at 8 Ohms and 1KHz. Weights 3.6Kg and uses an external 20V power supply.

20x4 lines white background LCD indicates the temperature and turns off amplifier at 60C degrees. Video of how it works can be found here:
https://www.youtube.com/watch?v=0hQdcBLgT8s
It is the first version but the principle is the same.

Comments

• 21 November 2018 at 04:57PM
• Where did you get your case? Does this get hot without any heatsinks?