"Class D" curious? Here's an interesting hack :)

Options
If you feel like playing with PWM 'digital' amplifiers, but don't just want to buy an off the shelf chipset, you can always do this, it appears:

https://hackaday.com/2019/02/12/tiny-amplifier-with-attiny/

B)

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https://youtu.be/O8of40tFsD8

Tip of the metaphorical hat to Gary Kaufman, who originally shared this link.