The purpose of the TEA2025B amplification circuit was to be a stereo amp that could work with a 6V battery and could provide relatively good power.
In fact, this tariff is more in line with the class D, but I do not have the means to do so, and since I did not want to use it, I went to this Tea2025B.
TEA2025B CIRCUIT SCHEMATIC
TEA2025B DATASHEET INFORMATION
TEA2025B TEST VIDEOSU
If you find a suitable box, you can get a very simple scheme and boxing stage with pcb. Even though the bottom noise is not heard at night and the sound is not very good with usb, it can work with 5-12v range.
A small cooler is needed, which is fixed on the level that cuts from the coolers on the old motherboard and does not play with the thermal paste and unwillingly hot silicon.