You can get line array kits from Zalytron. Some of their kits are designed by Joseph D'Appolito, including the Axon Array-1. Dr. D'Appolito's spec sheet claims a sensitivity of 96dB. A Zalytron kit includes the drivers, crossover parts, and drawings. It doesn't include the cabinet, but you can either build it from the supplied drawings or in many cases, purchase the enclosure from Zalytron separately. The line array kits run about a grand plus enclosures. They use excellent quality drivers from suppliers such as Focal and Vifa.
AV123 offers a couple of line array speakers, the LS-6 at about $4500 and the LS-9 at about $6K. Ready-built, of course, and I believe they both use ribbon tweeters.
AV123 offers a couple of line array speakers, the LS-6 at about $4500 and the LS-9 at about $6K. Ready-built, of course, and I believe they both use ribbon tweeters.