Confessions:
1. I haven't heard the Vandersteen 5A, just the 5.
2. I am a Vandersteen 3A Signature owner.
3, Although generally a fan of Vandersteen, I feel myself to have enough objectivity to let my ears make the decision, not my prejudices.
I heard both the 5 and the Sonus Faber Amati Homage years
ago. It wasn't at the same time or at the same dealer.
First off, if these two speakers were pitted in a beauty contest, the Amati would win hands down. They are flat-out gorgeous. The Vandersteen 5 is large, squat, clunky-looking and, in my opinion, cannot be considered, in any sense, a decorative enhancement to a living room. The Amati looks like a piece of furniture or a musical instrument such as a harp, doubling as a speaker. It is a visual enhancement to almost any room in your home.
Sound-wise, I would give the contest to Vandersteen by a wide margin. Remember that the listening sessions were at different dealers, using different electronics, in different rooms. The Vandersteen dealer takes particular care about setups, equipment matching etc. and room placement, while I would say that the other dealer seems to have difficulty showing equipment off to its best advantage. Sonus Faber Amati is certainly not a bad speaker. I found it just slightly on the warm side and I really have nothing bad to say about it. Although I don't remember any obvious flaws, it just didn't make me sit up and take notice of anything which it did exceptionally well. I thought that $20,000.00 was a lot to pay for what I was hearing. They are deep-bass shy, which I won't call a flaw, because for many, it is not a strong need to have. It is still worth noting and although the Vandersteen 5 did not excel in my deep bass tests, it had a far more substantial low end than the Amati's. Sorry for not saying more about the Amati's, I would say more about them if I remembered more.
The Vandersteen 5 was exceptional in 2 out of the 3 auditions in which I heard them. They are neutral, open, airy and throw off a wide soundstage in which individual instruments can be precisely located. It is an extremely smooth-sounding system, but instruments operating within the midrange and treble had just enough "bite" to sound real. Many of the complaints that people have about Vandersteen systems are just unequivocally absent on the 5's. Faults of the Vandersteen: I thought that all 3 times that I heard them, the bass was less than exceptional, a surprise for a Vandersteen speaker. Dynamics were also OK, but not standout, also a surprise. I heard them with Ayre K1 preamp, and V1 amp, again with K1 preamp and Bel Canto EVo amplifier. The third time which was at the N.Y. High Fi Show, used an Aesthetix Callisto preamp and Cary V-12 tube amp. I liked that demo the least. I don't remember the electronics used with the Amati's. It could have been BAT electronics, which I have never favored.