Via the clamping device which functions like a drill chuck, the external contact of the plug once inserted is firmly fixed to the RCA socket. The maximum contact pressure not only provides a secure connection, but also minimizes the transition resistance. Thanks to the two-piece locking sleeve, the sleeve cone does not rotate while the locking sleeve is tightened and thus the contact elements are not exposed to torsion pressure. Furthermore, in this way the dimensional inaccuracies of the external contacts of the female sockets are compensated. The central pin is grooved and slightly bent upwards and thus guarantees with its stable spring a long-lasting safe electrical connection with the lowest possible transition resistance. The metal connector body is obviously electrically decoupled from the central contact block and is made of as little metal as possible so that the WBT-0152 Ag is also free from eddy current to a large extent.