Cezar Chirila @ allaboutcircuits.com shows how to build a Class-D amplifier which has amazing efficiency.
What is a Class-D audio power amplifier? The answer could be just a sentence long: It is a switching amplifier. But in order to fully understand how one works, I need to teach you all its nooks and crannies.
How to Build a Class-D Power Amp – [Link]
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Mike is the founder and editor of Electronics-Lab.com, an electronics engineering community/news and project sharing platform. He studied Electronics and Physics and enjoys everything that has moving electrons and fun. His interests lying on solar cells, microcontrollers and switchmode power supplies. Feel free to reach him for feedback, random tips or just to say hello :-)
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This amplifier has no audio spec’s like its distortion or its frequency response or its damping ratio. Since it has no negative feedback then I think they will be poor.