I am a proud and delighted owner of AGD Audions.
In 50 years at this, I have never heard anything like them.
A clear window into the music. Classical is amazing. So much air and separation between instruments. So sweet violins.
And now there is the $5500 Tempo stereo AGD. Said to be very, very much like the Audions.
And then we now have the Atma-Sphere Class D monos. I don’t know for sure but believe them at the level of the AGD or beyond.
Ralph, a designer of great tube amps for 50 years, has actually said that tube amps are now on “life support”. That we now have solid state Amos that are as organic and lovely as the best tube amps with greater detail and bass.
Both AGD and Atma are 100 watts into 8 ohms and 200 into 4.
ARC amps have been developing their designs for many decades and their current amps are also superb. But much more pricey and, perhaps, more “traditional”.