Ranko Acoustics RCA-500(R) signal plug.  Gold-plated purple copper.  High conduct designed.  

Dramatically improved the appeal of HIFI.  Covered with high-quality insulators.  

Avoid contact impedance and make the loss of media to a very low level. 

High-quality brass shell plus black fine sandblasting treatment. 

Matte texture. The high quality damping protection and anti-jamming function makes the audio signal more accurate and stable. 

Nearly lossless in transmission.