@ClieOS

This is what I got from my listening of the XBA3 and the XBA4.

The XBA3 has better bass body and sounds more balanced. The XBA 4 has a super woofer but bass is non existent and sounds very thin but very very transparent. Transparency on the XBA 4 is very good. But the XBA 3 is more balanced and sounds better then the XBA4. If i has to choose between them both i would choose the XBA3