We now have for sale on the site the Arylic Up2Stream Amp 2.0 V3. A great little PCB that can make the foundation of loads of little powered streaming speaker projects.
https://www.kjfaudio.com/product/arylic-up2stream-amp-2-0-v3-wireless-streaming-amplifier-board/
https://www.kjfaudio.com/product/arylic-up2stream-amp-2-0-v3-wireless-streaming-amplifier-board/