Cheapest recommendations?

I have a 70" Onn (walmart brand) tv and the speakers suck. we dont do much movie watching, we're not sound connoisseurs, and we don't need excess bass. I'm just wondering if anyone has any recommendations of what to or what not to get. I just can't hear what characters are saying on our TV, and when I can hear them i usually can't make it out if they have any type of accent. as I said, literally anything is an upgrade, I just dont want to invest more than maybe 1-200 dollars into one. Was looking into a Hisense 2.0 channel (HHS205G). thanks!