Thanks--you guys have made me think about this with better perspective. I gotta do something about the room.
The funny thing about the "issue" is the problem only occurs on certain recordings and specific pieces of music on those recordings.
For eg--the Jayhawks "The Eyes of Sarah Jane" when the bass player hits one note at each exact same point in the song--there is a loss of control and the bass literally booms. The rest of the song (and the record)--the bass is tight and beautifully controlled/balanced.
So, at one bass frequency the speaker appears to lose control--it performs well at lower and higher frequencies in the "bass range."
I am taking some advice a few posts ago and am going to reconfigure my room--putting the speakers in the center away from back walls and my listening position also away from any back wall.
Luckily we are looking to move in a year or so and I can have "room" to design my listening room!