Cheapest way to hear dialogues from 5.1 sources?


Well-Known Member
I bought an android tv recently and the sound on 5.1 sources (hotstar, plex, netflix) is terrible. Too loud music and very quiet dialogues.
I am not looking for a 5.1 setup.
What I seem to need is an AV receiver which can downmix to 2 channels properly while increasing the center channel.
All AV receivers I have seen are > ₹25k.
An alternative is to get a soundbar. But, I already own a good 2.1 setup (Logitech Z-2300 's subwoofer/amp and wharfedale 10.2 diamond speakers). So, buying a soundbar seems to be redundant).

So, what is the cheapest way to get good sound?