Technics SB-6000 (1976-79), one of the coolest designs I've encountered! They are really pleasant and easy on the ears whilst still containing rich detail. Warm sound and good bass with the 12"! :
Technics SB-5000 Linear Phase 2 WAY Speakers Photo #1570835 - US Audio Mart
Technics SB-5000
Technics SB-G500 4-Way Loudspeaker System Manual | HiFi Engine
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Technics SB 5000 - Le forum Audiovintage
Vintage Technics Speakers For Sale (2023 Update) - Speakers in Code