Do subwoofers really help?

What is the nature of the 'mis-match'?
Impedance of speaker too low for amp?
Phase angle problem......amp can't produce enough power?
How can you tell there is a problem? distortion? Smoke/flames?/ Neighbors complain? Dog leaves room when you start the Stereo?
How did you end up with this combination? What's going to prevent you from doing it again?

Fixing this problem by buying MORE stuff is probably not the answer. You can do as others suggest, add complexity and drive yourself nuts with fine tuning / messing about. OR..... get a proper amp if you love the speakers or proper speakers if you love the amp.

I'm sorry.
Am I missing something here? Did BobRock read the many answers to his question?
Replacing speakers with less sensitive ones resulted in more bass?
what?
And just what WAS the solution? I'd like to know, especially if it was something silly like just a setup issue. If he fixed it by throwing more money at it, that's a horse of a different color.