@nicktheknife
Well, as far as class A amps having a certain sound IDK. As far as class A/B amps having a certain sound IDK?
But my own personal exposure leads me to think "different amps sound different" regardless of their class. This sadly won’t take you to quick and easy answer.
I presently have two pairs of "similar" but different monoblock amps both putting out similar numbers 450w@8o and 850w@4o, and 600w@8o and 1200w@4o. Parasound JC1+ and Luxman M-10x. These amps sound nothing alike. One 25w Class A, the other 12w Class A, but yet very different sound signature. Both great amps, and yes I do prefer the M-10x, but still they look the same on paper, yet are very different in sound.
Secondly I have two "similar" but different Intergarated amps both again putting out either 30w@8o Class A, 120w@8o AB, 200w@4o AB, or 150w@4o and 300w@8o AB. Riviera Labs Levante and Technics SU-R1000. These amps sound again nothing alike yet both have exquisite charm and character.
The type of amplification is secondary to the amplifiers design, I believe this to be very true and based on my own personal exposure I see and hear this every day.
Matching amps to speakers is yet another layer of detail to apply, and shades the character of both your amp and speaker.
I personally love the SU-R1000 for all that it offers and feel it’s an incredible amp in the 5-8k range, especially for vinyl. I feel it’s phono capabilities are on par with what I hear from my Mola Mola Tambaqui whilst listening to digital sources, even with a reasonably affordable MC cartridge ($500-1,000 range).
The Levante is intoxicatingly seduction and has power output options in spades, has a phenomenal headphone amp, and tube rolling potential to boot. 14-20k price range.
I also really love the Cambridge Audio Edge A from all that I’ve heard 3-6k, but enjoyed the Cambridge Azur line 851a which was one forth the price.
I haven’t heard, but have always been interested in the Michi line products as far as Intergarated amps go.
All would most certainly pair well with your Sonus Faber speakers.