So, was out in the trailer preparing for a trip and on a lark connected the TV to the front input on the Jenson and cranked up the volume. Got sound. I may regret this, but took it to 100 and that got the output in the typical range of the Jensen, meaning the Jenson has similar sound levels whether on radio, BT, or AUX. The sound quality is terrible, but the feature set is not bad. Probably need to do line out to a real amp and install some real speakers.
I also noticed they didn't put a cable hole for a bluray player or gaming console to be able to route up to the TV. Annoying.