Hey momojito, here you go.
Ok, so for the speaker on the TV location, yes. This is the problem with sticking it in a small cabinet. The only thing I can suggest is make sure your TV is mounted higher up in the cabient which will allow the sound to escape better. There is a bit of a volume loss that will come with the cabinet mount, but shouldn't be THAT significant. Try this with an iphone. The speakers are at the bottom. Play some tunes and cup your hand in different ways and see how it reflects the volume level. Use that concept as best as you can to your mounting.
As for the audio cable connections, what you need to do is:
Make sure you have 2 sets of RCA cables.
You need 1 set (Red/White = Audio, Yellow = video).
If you get DVD audio/video from the Jensen 970 to the TV already, then you have that cable set and you are good.
The second you need is JUST the Red/White RCA's, but a set of cables with the Yellow RCA on it is fine as well, the yellow just won't be used.
1 set of cables, which if you do get DVD audio/video on the TV, should already be hooked up properly. If you are getting only video, and no audio, then they cables are likely reversed somewhere.
On the back of the TV, you need to have one set connected to the AUDIO/VIDEO INPUT (red/white/yello). This set will the connect to the LINE OUTPUT of your Jensen AWM970.
This will give audio and video out from the DVD to the TV, so you can watch a DVD and play the DVD audio through the TV speakers.
Here is a copy of the Manual, and the wiring can be seen on Page 4.
http://www.jensenrvdirect.com/downlo...ers_manual.pdf
The next set of cables needs to go between the AUDIO OUTPUT on the back of the TV to the AUX IN 1 or AUX IN 2 on the back of the Jensen 970.
The only difference between the 2 inputs is the AUX IN 1 has the ability to have video in, so a game console, or something of the sort could be hooked up. The AUX IN 2 has only Audio (red/white).
When you have those connections run properly, put in a DVD, play it. Put the TV to Video IN (not HDMI, not PC) and you will have your video/audio from the DVD player.
Sometimes, the Jensen will automatically kick on the Speakers A. Just press the A button and it will turn them off. The volume is now adjusted via the TV only.
When you want TV to play on the trailer speakers, have the TV input selected, watching whatever you are watching, and select the AUX IN (1 or 2) based on how you chose to connect the wires, and make sure Speaker A/B/C is lit up according to which speakers you want to have on at the time.
To get the Jensen out to connect the wires, there is cover plate that surrounds the outside edge that needs to come off. (Pg 3 of manual), then remove the 4 screws, and slide it out.
If you have any other questions, feel free to post up and I will do my best to respond. It's not an overly difficult task, and only requires a phillips screwdriver.
Hope this helps you.
Cheers.