James B Lansing has been putting horns and cones together for a very long time, it is a combination that once heard, you realize that it has sonic qualities that other technologies just don’t match. The range, the ability to reproduce strings, voices, wind instruments as if the native source, and the dynamics of a breath at the same time as a screaming sax.
I should have bought 590s when they were new, the several times they were offered at a great price, would love to hear a pair and compare them to other JBL & Altec horn-loaded speakers but never have, … but if you found a pristine pair of 530s for a Benjamin maybe I should start watching the used market, … the 5x0 series was exceptional (especially at the price-point they hit).