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录音机诞生以来,人们不断改进它的结构,提高它的性能。随着双卡收录机的出现,又发展了倍速复制录音、连续放音、混合录音、混合放音、编辑节目等功能。今天的双卡机外形美观,功能齐全。但是它并非十全十美。首先,它增加了一个带盒和一套机械装置,使录音机体积增大,重量增加。其次,也就是它最大的弱点,有两个带动磁带的电机。即使制造得最精密,也不可避免地在转速上存在细微的差异。基于上述原因,日本一家电气公司在1986年开发、研制出了一种“双机械装置”的同轴双卡立体声便
Since the birth of the recorder, people continue to improve its structure and improve its performance. With the emergence of dual-card recorders, but also developed a double-speed copy recording, continuous playback, mixed recording, mixing playback, editing and other functions. Today’s dual card machine looks beautiful, full-featured. But it is not perfect. First, it added a cassette and a mechanism to increase the volume and weight of the recorder. Secondly, that is its biggest weakness, there are two motor drives the tape. Even with the most sophisticated manufacturing, there are inevitably subtle differences in speed. For these reasons, a Japanese electric company developed in 1986, developed a “dual mechanical devices ” coaxial dual card stereo