Perhaps, I've been in Home & Studio Audio/Video since about 1992, professionally for a few years. One fundamental rule is actual > faux. Leaning on 2 speakers to create a faux center speaker should generally NOT be better than having a good center speaker being an actual center.
Leaning on 2 stereo speakers means both are playing what would come from the center to create the illusion of centralized sound- dialogue in this case. An actual 3 speaker setup is going to route that "same" sound from twin speakers in a stereo setup TO that center speaker so it will originate there. What one is supposed to hear from the left will still play in the left, what one is supposed to hear from the right will stay play from the right and what one is supposed to hear from the center will come from an actual center, typically positioned right below or right above the TV screen.
That shared, I can fully agree on the "not necessarily better" which can be easily achieved by having a great pair of quality stereo speakers and then cheaping out on the center. And that can be vice-versa'd too... such as buying a top quality soundbar and pitting it against bargain basement stereo speakers. One could also argue a side by considering source: if the source is stereo, stereo speakers are going to play the source as good as it can be played. If the source if 5.1 or 7.1 or ATMOS, stereo is going to be attempting to play parts not intended to come from only 2 speakers.
IMO and with some generalities, the key tips to great home theater sound goes like this:
- No faux- get great quality speakers spread around the prime seating area. Don't lean on any technical trickery to create dedicated channels in the audio mix. Actual speakers "there" > Faux.
- Don't cheap out. This is the rare bit of tech that can be purchased as little as ONE time and last up to one's entire life without losing quality. So budget accordingly and pay up for best quality. One does not "win" this contest by chasing cheapest prices. They are basically just shooting themselves in the audio foot when price dominates the thinking.
- Consider the full, intended use and buy what directly and fully supports that. For example, if one is only ever going to listen to stereo sources like music, focus on buying 2 terrific stereo speakers. If one is wanting home theater for video, up to MANY speakers are required to create true ATMOS... or 7.1 or 5.1.
- While somewhat generalizing:
- a good Receiver + and great dumb speakers is THE way to the very best home theater setup.
- Soundbar based options are notches below that, but if one wants a soundbar, focus on the options that work with the core "rest" of a home theater setup like surround speakers and subwoofer... and see #2, as not all soundbar systems are equal.
- A quality pair of surround sound headphones is potentially comparable at this level... but generally a solo experience... and if headphones, wired > bluetooth.
- The lone soundbar is notches below that and I'll lump it with 2 speaker stereo setups here. HOWEVER, one could start with a 2-speaker setup- if they are "dumb" speakers- and then add in "the rest" of a surround sound setup over time... so that is a big advantage of 2 stereo speakers over lone soundbar.
- Mono speaker is notches below that and the speakers built into the TV is towards the very bottom.
Are there exceptions to the #4 stack? Of course! One could buy a fantastic quality pair of stereo speakers and enjoy stereo sound source that sounds way better than bargain soundbar surround sound setup. And all kinds of other variables can come into play such as the room size & shape, the floor and wall material, the prime seating location, etc.
HOWEVER, OP says they want a
soundbar and this is drifting way off that target. OPs primary issue is clarity of dialogue, so the key problem is a quality of speaker issue. Put the two together and OPs problem is likely budget:
$300 is too little when high-rated soundbars cost double to triple that budget. To get what OP wants, he should likely UP his budget and
buy a premium quality bar. I offered 2 good choices in that prior post and there are other great ones up in that price tier too. Down at $300 though, he's probably NOT going to get what he seeks. He may get something that sounds better than the HP he has now, but he probably won't get that dialogue as clear as he wishes it could be. There are
PLENTY of soundbars at $300 but his core problem is actually quality of sound.