It will do voice perfectly fine. Mids & treble no problem. Those frequencies can be delivered by small drivers. Small drivers are cheap. Typically you get boomy when you push a speaker beyond what it can deliver. You really needed something more powerful but did not want to spend for it.
The issue is deep bass. When you don't have big enough drivers then you have to fake it to go lower. Depend more on reflections through placement.
And that is what soundbars do. It's a fake deep bass. It can be boomy depending on room size and placement. Not necessarily bad but it's fake.
Take any speaker you have and place it in a corner and you can hear it. But the drivers cannot deliver that.
Bigger drivers cost more to make as do the amps to drive them. Even the Chinese can't deliver that for 5k.
Is that 100W RMS ? does not say rms on the site. Just says 100W. You can boost loudness with compression. Perception of loudness changes depending on frequency as higher frequencies travel further.
My ONyx Studio is 30W on battery and 50W on the main. The difference when hearing is an increase of two more volume steps. You can hear it but it isn't much.
If you want proper deep bass look at the Logitech for wired or other options which provide a subwoofer. Not soundbars alone.
This mivi is nothing more than a louder
Motion plus