Anyone familiar with these? Late 60's vintage JBL C50 Olympus S7r. 15" woofer with massive 20 lb. magnet; 15" passive radiator; and high frequency horn. Had the woofers rebuilt two years ago
JBL OLYMPUS DUAL DRIVER 375 POTATO HORN - YouTube
JBL Olympus C50 S7R
JBL Olympus (anybody have any experience with these?)