Most moderate or better receivers will allow you to boost those frequency ranges where you might have deficits. I, for example, have a little trouble with the voice mid-range frequencies, and have boosted both the mid-range and center speaker output for improved clarity.

If you get a HTIB, make sure that there is an equalizer where you can boost selected frequencies.

On your present TV, if you have both bass and treble controls, try turning down the bass, increasing the treble and overall volume.