[Jeff Gellis]

Thanks for your insights Bob
The bass was setup by Bill Merchant, a well respected NYC luthier. He did adjust the sound post and do those things that a qualified luthier will do.

I am getting from your answer that this is not a usual phenomenon to percieve a big difference in low end on the E. Is that fair? Perhaps I need revisit Mr Merchant?

I certainly understand that technique will effect the sound produced by an instrument. Although my technique is not refined yet, this difference is definately resulting from some physical situation with the instrument/environment. I do understand the concept of properly setting the string in motion thanks to some help from Rufus Reid.