Hi. I have the roku speakers and subwoofer, but I would like to add a external subwoofer that is bigger and I can control the bass on,the problem is the tcl roku tv has only a hdmi arc and a a/v input for...whatever(Haha idk why it has this,old players I guess) I can connect the new subwoofer to my spectrum box but I would only get cable tv sound not tv sound, me and my family use alot of roku media player for local media. Please can you help.
