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AV中心又称AV功放,它承担着音视频信号源的切换、环绕声信号的解码和各声道的功率放大等项任务,当前的主流产品还必须具备杜比定向逻辑环绕声解码功能。使用杜比技术必须向美国杜比公司申请专利使用权和技术认证,所以直到1995年以前,国内还几乎没有厂家生产这种主流型的AV中心,市场上是清一色的日本货和美国货的天下,它们的价格较高,最低档的型号也要4000元左右,而且这些“廉价”进口货大多素质平平,输出功率普遍偏低,功率器件则大多采用发烧友最不喜欢的厚膜集成块代替大功率管,瞬态互调失真严重,声
AV Center, also known as AV amplifier, which undertakes the audio and video signal source switching, surround sound signal decoding and channel power amplification and other tasks, the current mainstream products must also have Dolby Pro Logic surround sound decoding. The use of Dolby technology companies must apply to the United States DuPont patent rights and technical certification, so until 1995, the domestic production is almost no mainstream AV center, the market is the same for all Japanese and American goods , Their higher prices, the most low-end models have about 4,000 yuan, and most of these “cheap” imports most of the quality of mediocre, the output power is generally low, most of the power devices are used most enthusiasts do not like the thick film manifold instead of large Power tube, transient intermodulation distortion serious, sound