Bingo TVAD, dull, boring and to my ears. . . overpriced. That's the LS-25 Mk. 2, not ARC's finest product by any stretch. I would not want to generalize, but LS-25 fits regretably the ARC stereotype declared above.
As stated under the AudioPerv moniker, I have not heard the Calypso, but all indications so far are that it is a great linestage, once the right NOS tubes are found.
As far as I know, no one has ever accused Calypso of being an inducer of somnolence. There are other great linestages of course, but. . .