This Mono Amplifier Circuit is Super Easy To Build
Amazon.com: Taidacent DC3V to 9V Power Supply Mono Power Amplifier Board Mini BTL Low Power 5W 8 Ohms TEA2025B Directly Connect The Speaker : Electronics
10PCS IC TEA2025B 2025 ST AMP AUDIO PWR MONO 16DIP NEW | eBay
DX021 Audio Amplifier Local Circuit TEA2025 IC Mono Audio Amplifier Board DC 9V 12V 5w Digital Stereo Music Speaker Board DIY: Buy Online at Best Prices in Bangladesh | Daraz.com.bd