MDR Electronics manufactures Gold Plated RCA Extension Socket. MDR Electronics is an ISO 9001:2008 and ISO 14001:2008 certified company. The Company also manufactures various types of audio/video, pro-audio cables, connectors and cords, electronic and computer/laptop accessories, cable organizers, fibre optic series, and cable TV series The Gold Plated RCA Extension Socket, under the brand name MX, is suitable for audio-frequency [AF] applications. This RCA Extension Socket is also used in radio-frequency [RF] systems at low and medium frequencies. This RCA Extension Socket has a plug and a jack design for use with coaxial cable for frequencies ranging from the very lowest up to several megahertz.