夏普公司出售一种组合式音响系统MD—21,该系统将小型唱片(MD)放音机、CD放音机和调幅/调频调谐器组装成单个机器,售价8.8万日元(8381美元)。这种系统的设计与盒式收录机相似,可以进行从CD到MD的数字录音,而且具有编辑功能,记录音乐时可进行选择交换,调谐时可进行监听。该机输出功率为10W+10W,其左右扬声器安装在倒相式 Sharp Corp. sells a combination audio system MD-21 that combines a compact disc player, CD player and AM / FM tuner into a single unit for 88,000 yen ($ 8,381) . This system is designed to be similar to a cassette deck, allowing digital recording from CD to MD, with editing capabilities for selective exchange of recorded music and monitoring during tuning. The aircraft output power of 10W +10 W, left and right speakers installed in the inverted version