Class D amplifiers from these series are worth interest. Chinese modules made of the cheapest elements sound really good, but the carefully applied these chips will repay with very good sound. Of course, the optimization of the layout, the correct layout of the PCB is no longer a trivial matter, here you need to feel fast clocked pulse systems. Engineers from Texas Instruments carefully approached the topic. These are no longer clumsy buzzers as at the very beginning of the production of these systems. There was a really significant qualitative and engineering leap as well. The second series (TPA32xx) is clocked at around 2MHz, the first around 1MHz. Quite complex timing schemes were used to smooth out the output waveform to even limit the output filter even to the ferrite "pearl" on the wire plus the Zobel circuits.
These circuits surprise with a very detailed sound, they do not forgive any signal at the input mercilessly exposing the low quality of the signal source. The price is .... the module with TPA3116D2 is 10USD. Only switched mode power supply, e.g. industrial mounted on a DIN35 rail, and you can surprise Hi-Fi fans.
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Magic eye EM83 in action: https://youtu.be/4MBTfz4qUas
These circuits surprise with a very detailed sound, they do not forgive any signal at the input mercilessly exposing the low quality of the signal source. The price is .... the module with TPA3116D2 is 10USD. Only switched mode power supply, e.g. industrial mounted on a DIN35 rail, and you can surprise Hi-Fi fans.
....
Magic eye EM83 in action: https://youtu.be/4MBTfz4qUas
