An audio jack for receiving insertion of an audio plug, the audio plug having two or more plug contacts, each plug contact being separated from other plug contacts by at least one insulating ring, wherein a first plug contact provides an audio signal, the audio jack being configured for use in an electronic device having a first circuit and a second circuit, wherein the first circuit is a high gain circuit for amplifying an audio signal and the second circuit is an electrostatic discharge circuit; the audio jack comprising: an enclosure defining an elongate cavity having a longitudinal axis and an opening at one end; a first jack contact positioned within the cavity and adapted for connection to the second circuit; a second jack contact positioned within the cavity so as to contact the first plug contact providing the audio signal when the plug is fully inserted; and characterized in that the audio jack further comprises: a sled having a first position and a second position, wherein: in the first position the sled is closer to the opening than in the second position; the sled is biased in the first position; the sled is configured to be moved along the longitudinal axis of the cavity into the second position as a result of full insertion of the audio plug; and in the second position the sled electrically connects the first jack contact to the second jack contact and electrically connects the second jack contact to the first circuit. an enclosure defining an elongate cavity having a longitudinal axis and an opening at one end; a first jack contact positioned within the cavity and adapted for connection to the second circuit; a second jack contact positioned within the cavity so as to contact the first plug contact providing the audio signal when the plug is fully inserted; and characterized in that the audio jack further comprises: a sled having a first position and a second position, wherein: in the first position the sled is closer to the opening than in the second position; the sled is biased in the first position; the sled is configured to be moved along the longitudinal axis of the cavity into the second position as a result of full insertion of the audio plug; and in the second position the sled electrically connects the first jack contact to the second jack contact and electrically connects the second jack contact to the first circuit. a sled having a first position and a second position, wherein: in the first position the sled is closer to the opening than in the second position; the sled is biased in the first position; the sled is configured to be moved along the longitudinal axis of the cavity into the second position as a result of full insertion of the audio plug; and in the second position the sled electrically connects the first jack contact to the second jack contact and electrically connects the second jack contact to the first circuit. in the first position the sled is closer to the opening than in the second position; the sled is biased in the first position; the sled is configured to be moved along the longitudinal axis of the cavity into the second position as a result of full insertion of the audio plug; and in the second position the sled electrically connects the first jack contact to the second jack contact and electrically connects the second jack contact to the first circuit.