In the mid to late 1990s, I heard a pair of Avantgarde Acoustic horn loudspeakers (hornspeaker) for the first time at a local high-end audio showroom. I don’t remember the model of the speakers I was hearing, but I do recall that they were powered by a pair of Single-Ended Triode (SET) monoblock amplifiers. I assumed that these amps were a perfect match for these sensitive speakers. Sadly, I was not impressed with what I heard that day. The speaker's biggest sin was an exaggerated midrange, epitomizing the "cupped hands" sound. Fast-forward to 2024, when I was offered a pair of Avantgarde UNO SDs for review... I was skeptical, fearing I would experience something similar to what I had heard at that local dealer many years ago.