Shouldn't it be crisper/cleaner/more vibrant?

@patrickalston Klipsch have never been known for having deep bass. They may have lots of bass but not really deep.

I read the manual online.  It has a section on placement that I’m sure helps + also addresses isolation from floor as needed. 
 

That should cover it.  After that I’d say on to DSP/EQ/room correction as needed. 
 

All par for the course. 
 

Or one can jump on the gear change merry go round and spend a fortune there while leaving a lot on the table still if the basics of setting up for good sound are not addressed first. 

Yes, what did you do to correct the problem!!!

@willywonka  wrote ". . .Klipsch have never been known for having deep bass. They may have lots of bass but not really deep."

RESPONSE:  Hmmmm, not sure that "lots of bass but not really deep" makes sense. . . .Speakers don't have bass, recordings do.  Speakers, of course, have some capability to reproduce it.   

Regardless, I'm speaking from my frame of reference.  That is, relative to my full-range electrostats which have a steep roll-off below 50 Hz.  The Cornwall extends significantly lower as it can reach down to 34 Hz.  I call that deep.  

Klipsch Cornwall's sacrifice low frequency bandwidth for high sensitivity, see here!

Mike