CINEMANEXT AUDIO RACK SPEAKER TERMINAL BOX (STB)
https://shop.cinemanext.com/shop/p012195-cinemanext-audio-rack-speaker-terminal-box-stb-13386
https://shop.cinemanext.com/web/image/product.template/13386/image_1920?unique=44a5c5c
CNX-PID P012195 MPN 999-02-10-00-10