I am the owner of Jadis gear for many years. In my opinion the new iteration of monoblocks based on KT150 tubes should be compared between other monoblocks with the same tube (JA30MKII vs. JA80MKII vs. JA200MKII) and then judged which one sounds best. The KT150 tube itself affect sound to such degree that comparison to older Jadis model is not fair.