• Categories:Company News
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• Time of issue:2020-07-10 09:18
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(Summary description)Cheng Op Amp and Ji Cong Amp are two types of devices that junior enthusiasts and student enthusiasts like to use. They have many varieties, different performances, and different sound quality and timbre. How to match and combine the above two types of devices in order to make the best use of their respective advantages, give full play to their respective advantages, and create a priority price-performance ratio is a question worth discussing. 　　Although the author has accumulated some experience in the fever course for several years, he also stocks a considerable number of audio devices. Among them, there are many integrated operational amplifiers and integrated successful amplifiers, including the early fever op amps LM833N, NE5532N, NE5535N and the recently popular OP275G, LT1057, AD827JN. Jisongfang is some well-known models, such as TDA1514A, LM1875T, LM1876TF, LM3886TF and the early TA2030A. Of course, the integrated blocks such as JRC4558P, TL072, and TDA2030, because their performance is not enough to "fever" level, there is no need to come up with research. 　　 The above collections are all ready-made finished boards. The components and craftsmanship on the boards are still more elaborate and are very simple. For the above-mentioned op amps, because they are standard dual op amps, only one pre-buffer amplifier board is used, which is the one used for AD827 in "Fine Item 1876" in "Electronic News" on June 13, 1999. . The components are very sophisticated: DALE W gold film resistors, WIMA, ELNA capacitors, APLS potentiometers, silver-plated double panels, and the technology is also very sophisticated. The author removed the AD827 and replaced it with a 24K gold-plated op amp socket.