I have just changed my IT and use a tube amp too, Viva Solista not Jadis. I have heard Jadis on a number of occasions. The IT is everything people say of it, but only 50 watts. It is fast clean, transparent, but it lacks drive. It is on the polite side of neutral. It worked well on my Living Voice Avatars, but was running out of puff on my new Acoustic Zen Adagios(89db, ok, but only just. As a matter of interest, my Karan K180 has many of the IT virtues, but certainly more base control and better dynamics. A clear step up with the Adagios
