Ps. My setup is a LG cx 65 inch. 2x Beolab 28. 2 listening positions, only Theatre and Theatre and Beolabs.

There could be lots of things wrong in terms of setting and user configuration. There's not enough there to really help you specifically. Your hardware should have more than ample bass - even at neutral settings - so genuine concern The Theatre has a high-speed eArc cable supplied. Ask why they never used it - you paid for it. The old stage cable should go with the stage. Check you are not in Night mode - that may make a difference. Check Listening positions >> Select one >> Speakers Included >> Bass Management (120hz) Check Sound modes >> Select One (movie) >> Advanced >> Check if anything is wrong here (hard to do as reference is not easy) Failing everything, contemplate doing a complete factory re-set of the Theatre and re-build from scratch?

I ch everything you mentioned. All settings are correct so my next question is, could it be the hdmi cable I am using from the Stage? I think they left it there because it was convenient? Cou the earc cable do the trick watching TV?

Question is, how does it sound for music?  

Much better but cannot say that the Theatre is very bassy. Beolabs are much bassier.

Sounds weird, looking forward to hearing the Stage at home..

Get the Dealer to come in and fix the problem. You are clearly not happy and you paid the dealer some big cash for this. Make it warranty claim/non-satisfactory item claim.

Guys, crisis resolved. Last night I watched Deadpool 2 on TV and that made all the difference. It's a movie not that old and the bass was fenomenale. I even had to set it to 2 because higher was too much for our living room. The bass was deep and full, absolutely lovely. Really happy now. Guess my TV channels weren't the best I watched before but now I know what the Theatre is capable of. So guy sorry if I reacted too soon and made a drama out of nothing. Just to be sure I will replace the cable from the Stage with a hdmi 2.1 earc cable and also the one coming from the Nvidia Shield. Only the best from now. So guys, thank you for the comments and info.

With me the problem is not as bad as you describe, but the theatre only works in 6th gear with Dolby content. But when it does, it does. Music works perfectly but older movies can come over "unsynced".