This might help:
"Avantgarde's Series 3.0 Uno has made its appearance. According to Jim Smith, president of Avantgarde-USA, the changes are evolutionary, refining the design rather than changing it in any fundamental way. The tweeter and midrange horn drivers are the same as before, but the SUB 225 subwoofer has been reworked, and the internal wiring (and the external jumpers providing connections from the midrange to the tweeter and the subwoofer) and the connectors have been changed. The SUB 225's 10" drivers now have butyl rubber rather than urethane foam surrounds, and the subwoofer amplifier has a new input board that features better resistance to RFI/EMI, higher sensitivity, and now has line-level (balanced and unbalanced) as well as speaker-level inputs. All binding posts have been changed from WBTs to what Avantgarde claims are better-sounding Cardas rhodium-plated connectors, and the internal wiring and jumpers are from Cardas. (Casey McKee, Avantgarde-USA's national sales manager, told me that he spent three weeks auditioning cables before selecting this one.)"
From a Stereophile update on the 3.0 Uno speaker, by Robert Deutsch, August, 2002. (A footnote acknowledges 3.0 revisions to the Duo as well).
As to your disappointment with the speaker, I can tell you that the speaker has certain limitations, just like any other, at any price. The 'shouty' quality may be a function of both placement and associated equipment, and is a characteristic that can be exaggerated, or made to virtually disappear, depending on alot of factors. It is not a big price to pay to get the dynamics and clarity that come from a well designed system, built around a properly set up pair. (Not that I'm an expert, but I got mine in February, and have been experimenting with them since). To me, the biggest foible is the bass, which is tricky to get right, and i'm still working on it. But, and take this with a grain of bias, since I own a pair, I have traditionally listened to Quads, old and new, and have an enormous regard for proper midrange. And, the trade-offs made by the Duo don't make me want to reach back to the Quads anytime soon, because despite the legendary quality of the 57 and the 'improved' peformance of the Crosby 63 (I have both, as well), they suffer from far greater compromises, compared to the 'real thing' in the service of what they do well.