DELTRON RCA (PHONO) CONNECTORS Deltron are the largest and most well known manufacturer of phono connectors in the UK. All plugs (except economy type 425) feature a patented T-slot spring action on the ring/shell contact, ensuring positive contact with any make of phono socket. Note that in many countries this connector type is known as … Continue reading "DELTRON 331 RCA (PHONO) PLUG GOLD SHELL, GOLD CONTACTS"