Who knows how a power amplifier works? How does it work ? approximate circuit design? What is the gain class A A/B

нету там информации(( there is no information there((

Здравствуйте! Скажите есть ли принципиальная схема усилителя мощности? Может быть есть статья о том, как устроен усилитель для наушников? Hello! Tell me is there a schematic diagram of a power amplifier? Maybe there is an article about how a headphone amplifier works?

Only one side! I just listen Lossles the electrical resistance of both headphones is the same

My problem remains. Low-frequency headphones play weaker, what should I do?