Specs: Positive and negative poles are made of high-purity OFC copper with 24K WBT™ supra-gold plating. The positive socket utilises a dual-prism spring-loaded feature to assure secure contact with Teflon™ dielectric insulation. All sockets are precision machined to 0.02 mm resolution. (US$70.00 per pair).
The illustration below shows the RCA sockets before and after replacement with the WBTs.
RCA sockets can be purchased at www.wbtusa.com