SB50BT Soundbar

Your TV has a headphone output (3.5 mm female jack) and your soundbar has an RCA input
Buy a jack-RCA cable like this:

You connect the jack to the headphone output of the TV and the other to the RCA input of the soundbar, which you will switch to this input
The sound from the TV should not be turned up too high => saturation of the soundbar input => sound distortion, you need to find a balance to be above the noise but not saturate, the best is to set the volume of the home quite high, benefit: you adjust the volume with the TV remote... ;)

--
I call a cat a cat *
*in French in the text

Yes, the TNT is connected via HDMI
The TV is a Tokai LTE 2420s
Thank you

Hello,
You need to tell us more...
TNT adapter connected to the TV via HDMI?
Complete reference of your TV

--
I call a spade a spade *
     *in French in the text

I'm going to give it a try then.
Do you think it's normal that the subwoofer only produces a few deep sounds, not really any music?

And what is the complete reference of your TV?

--
I call a spade a spade *
     *in French in the text

Thank you, thank you
You are just too awesome!
It works!
Great job
Thanks again!

But you're welcome, and feel free to check in or if you have any other questions.

--
I call a spade a spade *
*in French in the text

Hello, I have a problem with this damned soundbar. The mode button won't work anymore and I can't switch to AUX IN, it stays stuck on Bluetooth. Once I managed to do it but I don't know how, and since then I can't change modes. It's frustrating. Does anyone have an idea?