Playing movies with 5.1 soundtrack over DLNA

[shereeboman]

Hi!

I'm new to this, so sorry if a lame question

Have a samsung UE40F6400 TV.
I'm trying to play a movie from a DLNA media server.
The movie has 5.1 AAC soundtrack.
The TV is not connected to any sort of amplifier (basic built-in 2.0 stereo).
The problem is that center soundtrack isn't getting mixed properly and dialogues aren't played too well.

Tricky part is that when playing a movie that has DTS 5.1 sound, everything is fine.

What am i missing? Known issue? Anything i can do to fix mixing of the 5.1 audio?
Do i need to install some custom hacks on the TV's firmware to manually modify some hidden settings?

Thanks!