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 C50 Olympus Vintage Speakers From JBL's Golden Era
JBL Olympus C50 S7R
JBL C50 S7 Olympus Speakers (Pair) Circa 1962 | Reverb
JBL C50 & L200 Speakers! - YouTube
JBL C50 Olympus Vintage Speakers From JBL's Golden Era
JBL C60 (S7R) "Sovereign" in Oak, Vintage Rockers! - SOLD – Holt Hill Audio