DALI Callisto 6 C wireless loudspeaker
PS Audio's Paul McGowan has been sending out a daily newsletter by email since 2011. In his May 29, 2019 epistle he asked, "What would our world of high-end audio look like if there were only active wireless loudspeakers? If even the half-a-million-dollar mega-beasts were internally amplified and connected via wireless and controlled from an iPad? No more boxes. No more wires and cables. Only speakers."
It's been a long time since we've seen a really new tweeter design. Only five basic types have ever been developed: cones, domes, panels, ribbons, and ionic plasmas. And the most recent of thesethe long-defunct DuKane "blue-glow" Ionovacwas introduced 40 years ago. Since then, tweeter development has been more evolutionary than revolutionary, a series of refinements that has made them more efficient, more reliable, and smoother and more extended in response.
Ask anyone in the street what they think of when they hear the word "loudspeaker" and odds are they'll describe a wooden box with moving-coil drivers sitting in its front. But ask a Stereophile reader and it's quite possible that he or she'll describe a large, flat panel reminiscent of a room divider: in our