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Audio/video cable

Audio interconnect cables are commonly utilized to connect sources of audio analog electrical signals with the other audio components in an audio recording or playback system, for example, amplifiers, signal processors, mixers, CD recorders, A/D converters, CD players, etc. When an electrical signal is transmitted over a cable from a transmitting end to a receiving end, frequency-dependent attenuation may cause the waveform of the signal at the receiving end of the cable to be significantly different from the waveform of the signal at the transmitting end. Audio cables transport low level voltage signals from a source such as a microphone or an audio player to a load such as a preamplifier or a power amplifier. The cable must be able to transfer the signal without changing its amplitude and shape within a frequency band covering at least the audible range from 20 through 20,000 Hertz. Standard audio cable transmits signals near the lower end of the audio frequency range at velocities of propagation below about 10% of the speed of light (c). On the other hand, standard audio cable transmits high frequency audio signals at velocities of propagation above about 30% of c. These great differences in the velocities of propagation result in substantial distortion of the output signals. Video cables are used to convey electronic video signals from a source device such as a receiver to a display device. A coaxial cable is typically used for transmission of high resolution video because of its superior performance over twisted pair cable. Cables comprising twisted pairs, for example Category 5 cable (CAT5) are widely used to transmit signals between computers and various telecommunications, networking and display devices.

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