In my limited experience I have found tube amplifiers to sound vastly different when mated to different speakers of varying loads. For example my Jadis Orchestra Reference sounds excellant with my Harmon Kardon Sixtys or my Triangle Titus's, but absolutely blah with my Martin Logan SL3's. When mating amplifiers to speakers, you really do need to listen yourself, or, ask the designer what he or she might think of the match. . .They will know what they designed that particular amplifier to do. Sorry that I can't be more helpful.