PC Speaker electronics to amplifier conversion

The larger 12 volt board has 2 - TPA3116 chips and the smaller board.. Not sure but it's a nice board to build with a 5 v.d.c. supply. I've used both and they are good..

If you're stuck on the TEA 2025 chip, here's a nice 2.1 board that can give you a sub output and a 5 volt power source to run a input of some sort like a Bluetooth receiver or perhaps an FM tuner. The chips and the 5 volt regulator are all monolithic so not to destroy the FM sensitivity..

Assembled TEA2025B 12W+12W 3Channel Subwoofer Power Amplifier Board Module | eBay
 
You can also use a car stereo for a easy to build battery power radio.

Walmart has receivers with Bluetooth, Aux input, Mp3 etc etc for 25 dollars.


Also for free radios to steal parts from or just use.
You can go to car stereo install shops and they usually have old removed units for free.
Also car junkyards are full of units.