I sold my beloved Apogee Caliper Sigs when Apogee went out of business because I was afraid of not being able to get support. Biggest stereo mistake I ever made. Finally purchased a pair of Duetta Sigs, a few years later to replace the gone Calipers. Now have Apogee Divas that I had lusted after when I owned the Calipers.
I don't think I will ever replace the Divas.