Are Two Era 100’s as rear tv speakers good for hearing voice from TV/Film?

We have a Ray under the tv, but as always with tv these days the voice is always heard to pick up, but when there music and loud incidents it’s way too loud. So compromise with low volume and subtitles.

I’ve long thoughts a couple of Era 100’s behind the couch would be the answer but now I’m thinking of buying them I’m wondering if it would just enhance the bass and not voice, wondering if anybody has any experience of this set up and/or advice?