过去随便翻阅一本电子或音响专业报刊,一提起摩CD机,无非就是增加电源容量、更换性能好一些的低通滤波器用运放以及更换瓷片电容为CBB电容等,实践证明这样作虽有一定的收效,但并不会出现一些人所谓的音质有脱胎换骨之变化。实际上,对CD机音质提高极为有限。随着VCD技术的问世,国内涌现了一大批开发生产VCD板卡的厂商,改装VCD更为广大电子音响爱好者提供深入了解CD机电路原理的大好机会。许多厂家借着开发VCD板卡的技术力量开发了专用摩CD机DAC电路的所谓D/A板。笔者最近邮购了一块由杭州中裕技 In the past just read an electronic or audio professional press, mentioning the motorcycle CD, nothing more than to increase the power capacity, replace the performance of some of the low-pass filter with the op amp and the replacement of ceramic capacitors for CBB capacitors, etc. Practice has proved that although there are A certain effect, but does not appear that some people so-called sound quality has changed. In fact, CD player sound quality improvement is extremely limited. With the advent of VCD technology, a large number of domestic manufacturers have developed a production of VCD board, modified VCD more electronic sound enthusiasts provide a good opportunity to understand the CD circuit theory. Many manufacturers have developed the so-called D / A board of the specialized friction CD machine DAC circuit by developing the technical power of VCD board. I recently mail a piece by the Hangzhou Yu Technology