More exciting insights from the casa Arteluthe. In the photo, the mysterious prototype "son of Balestra? Taller than Spada and smaller than Balestra, but still six feet tall... This is the extreme iteration of the Stiletto spirit: reproduction of the essential musical message (7 octaves) by a single transducer. In this example, a 15" woofer and a 12" woofer reproduce frequencies below 100 Hz, each loaded differently to extract maximum tonal density. Between the two 8" main drivers is a compression driver, with the biradial horn providing even 90-degree coverage.