You can improve the bass with subs -- improve the sound overall with subs. What you do depends on your aspirations for the system.
In my desktop system, which has Harbeth P3ESR speakers (5" woofers), I added a used B&W ASW610, a 10" powered sub, and it improved the presentation a lot, in just the way you asked about.
As others have said, multiple subs are helpful in smoothing bass nodes and increasing the sense of ambiance. You might start with one, and if you like the result but want even more, get a second matching one to try. If you have room, 4 or more subs can smooth the bass even more.
Have fun!
In my desktop system, which has Harbeth P3ESR speakers (5" woofers), I added a used B&W ASW610, a 10" powered sub, and it improved the presentation a lot, in just the way you asked about.
As others have said, multiple subs are helpful in smoothing bass nodes and increasing the sense of ambiance. You might start with one, and if you like the result but want even more, get a second matching one to try. If you have room, 4 or more subs can smooth the bass even more.
Have fun!