Klipsch Forte III loudspeaker
I'm fortunate to have reviewed in recent years not one but three different pairs of horn-loaded loudspeakers. My jaw dropped when I reviewed what would prove the finest loudspeaker to ever grace my home, the Volti Audio Rival. Second came a pricey but pleasing pair from handlebar-mustache king Gordon Burwell, the Burwell & Sons Homage. Then, at the urging of occasional Stereophile contributor Steve Guttenberg, I took on the fat-boy Klipsch Heresy III. As the Beatles used to say, I was dead-chuffed.
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 
