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 C60 (S7R) "Sovereign" in Oak, Vintage Rockers! - SOLD – Holt Hill Audio
JBL Olympus C50 S8R 1965 | Reverb
JBL C50 Olympus For Sale | Audiogon
JBL Olympus S8R | Deal Home Audio
JBL C50 S7 Olympus Speakers (Pair) Circa 1962 | Reverb