Abstract: A signal plug including an external sleeve, a line-connecting portion and a plug main-part. The line-connecting portion has two metallic end pieces separated by an insulation member, and a front end extending to form an insertion-connecting portion. The main-part includes the line-connecting portion inserted into a front end of an outer hard metallic receiving portion. The external sleeve is connected to the main-part with the insertion-connecting portion extending outwardly from the external sleeve. The outer receiving portion is made of phosphor bronze and will not deform during assembling. The inner line-connecting portion is made of high electric conductivity copper.

Abstract: A structure of a speaker signal line having a middle filler layer, a plurality of transmission conductors and an outer coating portion, wherein, the middle filler layer is comprised of many hollow tubes. The transmission conductors are equidistantly spaced and wrapped over the middle filler layer. The coating portion is made of polyvinyl chloride composition. The middle filler lay is formed in the way of entangling to increase its strength and flexibility. The transmission conductors are spaced mutually in different layers and wrapped over the middle filler layer in mutual contrary directions. All the elements above are combined together by adding the outer coating portion, thereby, the inductive resistance induced by the transmission conductors equidistantly spaced in different layers and wrapped in mutual contrary directions can be mutually offset.

Abstract: A structure of signal line comprising a core portion, a middle filler layer, an obscuring layer and a coating portion, the core portion is a transmission conductor with a rectangular cross section; the obscuring layer has at least a knitted metallic obscuring layer; the coating portion has at least a layer made of polyvinyl chloride composition; and the middle filler layer is comprised of a plurality of hollow tubes. The core portion is tangled with the middle filler layer to make the line stronger in addition to being flexible, so that the line will not have the core portion damaged when it is bent to deform, plus the obscuring function of the obscuring layer, the interference among a magnetic field, radio frequencies and static electricity can be reduced, thereby, attenuation rate of the line can be reduced, distortion of the line can be smaller, and high quality of the line can be obtained.

Abstract: A structure of a speaker signal line, comprising a middle filler layer, a plurality of transmission conductors and an outer coating portion, wherein, the middle filler layer is comprised of many hollow tubes; the transmission conductors are equidistantly spaced and wrapped over the middle filler layer; the coating portion is made of polyvinyl chloride composition; and wherein, the middle filler layer is formed in the way of entangling to increase its strength and flexibility. The transmission conductors are spaced mutually in different layers and wrapped over the middle filler layer in mutual contrary directions; all the elements above are combined together by adding the outer coating portion, thereby, the inductive resistance induced by the transmission conductors equidistantly spaced in different layers and wrapped in mutual contrary directions can be mutually offset, this lowers mutual interference and has the transmission speed and transmission quality of the signal line increased.

Abstract: A structure of signal line comprising a core portion, a middle filler layer, an obscuring layer and a coating portion, the core portion is a transmission conductor with a rectangular cross section; the obscuring layer has at least a knitted metallic obscuring layer; the coating portion has at least a layer made of polyvinyl chloride composition; and the middle filler layer is comprised of a plurality of hollow tubes. The core portion is tangled with the middle filler layer to make the line stronger in addition to being flexible, so that the line will not have the core portion damaged when it is bent to deform, plus the obscuring function of the obscuring layer, the interference among a magnetic field, radio frequencies and static electricity can be reduced, thereby, attenuation rate of the line can be reduced, distortion of the line can be smaller, and high quality of the line can be obtained.