In an audio system my balanced interface audio connector couples an audio driver device and an audio receiver device by means of a cable containing a pair of conductive differential lines within a shield. The balanced interface audio connector comprises an electronic filter and a manually operable switch by means of whose displacement between a first position and a second position, the electronic filter can be activated or deactivated. In the first position of the switch, the electronic filter is deactivated and the shield is connected to the audio connector's ground contact pin. In the second position of the switch, the electronic filter is activated and the shield is connected through the electronic filter prior to connection with the connector's ground contact pin. The method of using my balanced interface audio connector functions as a ground lift to safely break a ground current loop and simultaneously suppresses radio and electro-magnetic frequencies from contaminating the final audio program signal.