Outdoor TV volume too low with DVD
We only used our 32" Jensen JE3212LED TV once to play a DVD of Long, Long Trailer with Lucille Ball which our friends brought on our campout. Volume on TV thru the antenna goes to 70 on the scale is is plenty loud. But when we play a DVD thru the Radio/ CD/DVD, the volume only goes to 40 and is way too low. We had to be right on top of the TV to hear it. Is there a way to make it louder? I see 2 speakers next to the radio and the 2 up by the awning which I guess are operate thru the dash radio. That's silly, you'd think they would have it coming from the outdoor TV and radio/cd/dvd player. In our bag of manuals was a small bag with lots of cables, perhaps a set goes from the Radio/CD/DVD audio to the TV. Any suggestions?
Also, do I really need to use one remote for the TV and the other to play the Radio/CD/DVD?
2004 Winnebago Minnie 22e(went to a nice family Oct 3, 2015)
2016 Forester 2701DS (Aug 31, 2015)
2017 Camping 12 trips 38 nights
2018 Camping 10 trips 38 nights
2019 Camping 6 trips 19 nights
2020 Camping 0 trips Cancellations 3