Actually, the mystery is in the name, because Tom Willis has not decided what to call these yet.  They are based on he classic Art Audio Tempo of a few years ago, but use the driver circuit is from the current Concerto monos.  This plus some very good transformer design has led to an amazing sounding pair of amps.  They use, at the moment Art Audio branded EL34s which are some East German NOS that Tom has bought up and had branded, they also have some proprietary coupling caps.  They are class A triode mode and produce about 28-30 watts, which is more than adequate with my Tannoy MGs.  These are the first production models that Tom has asked me to evaluate. 

How do they sound? really fluid and lucid, there is a great flow to the music.  The bass is full without being overblown and the whole frequency range is even and musical.  There is a smoothness of presentation, that is also really detailed. Listening to a multitude of sources from Vinyl to tape, and CD to streaming from Radio Paradise and it all sounds bloody good. Really pleased with these.  The detailand clarity on things like vocals on Simon and Garfunkel's "The Only Living Boy In New York"  is breath taking. Viv says she now finds the sound "Totally Immersive" and we are spending the evening just listening to tunes. Will they replace my Quintet? Almost certainly They are well worth a listen if you get the chance.