WiFi Stereo Audio Router Smart Multi-Room WiFi Audio Router Supports Amazon Alexa Bluetooth HDMI Arc Fiber Optic Spotify Airplay - China Multi-Room Audio System and Loud Speaker price | Made-in-China.com
Amazon.com: Arylic A30+ WiFi & Bluetooth 5.0 Mini Stereo Amplifier, 2 Channel Class D Wireless Amplifier, Home Amplifier for Speakers with spotify,airplay,Multiroom/multizone Digital Audio Speaker Amp : Electronics
Amazon.com: Subwoofer Amplifier Board, Arylic WiFi & Bluetooth 5.0,50W2 Stereo Pair + 100W Sub Class D Stereo Amplifier,Multiroom/multizone Home Audio Amplifier Board for DIY Speaker-Up2stream Amp 2.1 : Electronics