Review on 🔊 Wireless 2-Channel Bluetooth 5.0 Stereo Audio Receiver Amplifier Board with Treble and Bass Control - Mini High Power Digital Amp Module for Home Passive Speakers by Brandon Skeet

I used this amp to drive a pair of 6 inch in wall speakers priced mono. When using an external 19V power supply, it provides enough volume for my living room and kitchen. The sound quality is way better than some of the tiny Bluetooth speakers on the market. Pairing via Bluetooth is direct. I didn't notice any lag when playing YouTube videos. These models don't announce "Bluetooth Connected" so I just leave the device on. Cons: You must provide your own power supply. I was able to hack a power supply from an old HP laptop for this amp. Must use a 5.2mm plug from another kit to make the connection.