Audio coaxial digital audio.Imported low sound bar sales

　　For most music lovers, the SPDIF output standard should be familiar. It is the abbreviation of (Sony/Philips Digital InterFace) SONY and PHILIPS home digital audio interface, which can transmit LPCM streams and surround sound compressed audio signals such as Dolby Digital and DTS. SPDIF is divided into coaxial and optical fiber from the transmission medium. In fact, the signals that they can transmit are the same, but the carrier is different, and the interface and connection appearance are also different. However, optical signal transmission is a popular trend in the future, and its main advantage is that it does not need to consider the interface level and impedance issues, the interface is flexible and the anti-interference ability is stronger.

　　Coaxial SPDIF is generally called coaxial input, and COAXIAL is marked on the back panel of the equipment. The digital coaxial interface uses a coaxial cable with an impedance of 75Ω as the transmission medium. Its advantage is that the impedance is constant, the transmission frequency band is wide, and the high-quality coaxial cable has a bandwidth of several hundred MHz. The time base error of digital coaxial transmission is very small, so this transmission method has a better performance on sound quality. However, please pay attention to the impedance matching of the transmission wire when using it. When matched with a 75Ω coaxial cable, the impedance can be kept constant and the signal transmission is correct. That is to say, in the matching of transmission cables, 75 ohm coaxial cables suitable for transmitting high-frequency digital signals should be used as the matching standard, which is commonly referred to as "digital cable." Generally speaking, the audio quality of the coaxial terminal output is similar to that of the optical fiber output. Therefore, some DVD players only set up digital coaxial output without the optical output function.

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