The Druid has not crossover. The FRD is naturally rolled off on the both ends and the supertweeter is rolled in via a filter network at 12kHz. The FRD gets a direct connection from the amp so the 40Hz - 12kHz range is produced without the signal traversing a network.
The Druid supertweeter waveguide is aluminum but the driver itself is not. There is nothing bright about it.
I haven't heard the Callisto on a comparative basis. I have heard them in someone else's system. It's a good speaker certainly but not in the same class or type as a Druid. 10 - 11 db less efficiency; markedly less bass and the bass it has lack's the Druid's definition; nothing close to the Druid's coherence. And one more big thing that you can only understand once you've heard a Druid -- there is the inescapable signature of music being squeezed through a crossover, which the Druid doesn't have.
Also, the Callisto woofer/mid driver is not fast enough to give the speaker the top-to-bottom transient uniformity that is elemental to the Druid experience.
The Callisto is much smaller of course, has the placement flexibility of a standmount. Really a different speaker from Druid. But at the end of the day, it's conventional and the Druid is a departure designed to overcome the constraints that still saddle the Callisto design approach.
As for warranty -- this is a practical irrelevancy. In any case, in the Callisto, no matter what you do you can't get away from the fact that the signal is jammed through that crossover before you hear the meat of the music.
Phil
