The subwoofer should be active, because you use optical fiber, so the decoding is in the power amplifier, and the AV line should be connected to the subwoofer from the power amplifier, which is what I did.
Guangzhou Ailang Intelligent Technology Co., Ltd., AVLIGHT/ Ailang, is a famous audio brand under Guoguang Electric Appliance Co., Ltd. (stock code: 002049). Headquartered in Guangzhou, China, it focuses on intelligent terminals and applications related to intelligent audio and video integration.