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 - YouTube
Used Technics SB-5000 Speaker systems for Sale | HifiShark.com
Technics SB-5000 Two Way Bass Reflex Loudspeaker System Manual | HiFi Engine
TECHNICS SB-5000 Linear Phase Vintage Speakers (1977) - Catawiki
TECHNICS SB-5000 Linear Phase Vintage Speakers (1977) - Catawiki
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Vintage Technics Speakers For Sale (2023 Update) - Speakers in Code