This is a complete test of the popular Boyuurange / Reisong A50 300B MKIII amp as delivered in 2021. It includes voltage points tested, an analog oscilloscope test, as well as THD and power output tests. This will give you a good idea about what you are buying, as well as what it actually is vs advertised.
The goal of this series is to study this made in china amp, and come up with a step by step modification plan to bring out the real potential of the hardware, without resorting to parts replacements that could easily exceed the cost of this amplifier.
After my experience building an amplifier that started out with a similar topology, I'm pretty sure we can do exactly that!
