Bluetooth 5.0 50W+50W+100W 2.1 Channel Subwoofer Amplifier Board TPA3116D2 HiFi Treble and Bass Control Stereo Digital Audio Amp Board for Home Theater DIY Wireless Speakers - Yahoo Shopping
Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 50W×2+100W, 12V-24V Audio Power Amplifier Module with Treble and Bass Control for DIY Bluetooth Audio and Store Home Theater - Newegg.com
TPA3116 100W Subwoofer Digital Power Amplifier Board TPA3116D2 Amplifi – Aideepen
Nobsound NS-03G SUB Mini Mono Channel Digital Amplifier HiFi Home Subw– doukaudio
100W Subwoofer Amplifier Circuit Diagram, Working and Applications
Digital Subwoofer Amplifier For Home Speakers Board TPA3116D2, 50Wx2+100W, 2.1 Channel, 12V 24V Power, From Guiy, $21.66 | DHgate.Com