TPA3116 Mini Sound Mono subwoofer center power amplifier AV home theater sub / swf-out connected to subwoofer 2.1 / 5.1 / 7.1
https://www.vogueparade.com/shopping/EN/A3/131/1005003606075030/tpa3116-mini-sound-mono-subwoofer-center-power-amplifier-av-home-theater-sub-swf-out-connected-to-subwoofer-21-51-71//