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Anonymous users2024-02-11The World's Top CD Player Features:
It adopts advanced laser technology, digital technology, computer technology and various new components, and has the advantages of high-density recording, long playback time (up to 60 75 minutes), easy operation, and fast song selection. It can realistically reproduce the recorded content, with clear layers and a sense of presence. Its acoustic specifications are very high, with a large dynamic range, a frequency response width of 5 2000Hz, and a small degree of distortion.
How it works:
The CD record player is mainly composed of laser pickup and turntable system, servo system, signal processing system, information storage system and control system. The laser pickup is a key component of the CD phono, which consists of a semiconductor laser, an optical system and an electrical detector.
The laser is a low-power (MW-class) AIGAS laser diode, and the laser beam emitted is projected onto the information surface of the record through an optical lens system, because there are many pits recorded on the record, so when the light spot hits the pit, the signal picked up by the photodetector is small due to the weak reflected light.
When the light spot hits the aluminum film without pits, the reflected light is stronger, and the signal of photoelectric detection and pick-up is large, so that the corresponding high and low level of electrical pulse signals are generated in the output of the detector corresponding to the presence or absence of pits.
Then, through the RF amplifier, the serial digital signals of "1" and "0" are obtained by its internal comparator, and added to the digital signal and processing circuit for demodulation, frame synchronization signal detection, error correction processing, etc., and the processed data is added to the digital-to-analog converter (D A), and the converter is output into an analog sound signal.
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Anonymous users2024-02-101 Sony CD player (founded in 1946 in Japan, the world's leading brand of high-end imaging, the world's leading brand, the leader in the information technology industry, Sony (China)****).
2 Panasonic (founded in Japan in 1918, the world's top 500 enterprises, the world's brand, a large multinational company, the world's largest electronics manufacturer, Panasonic (China)****).
3 Philips (founded in 1891 in the Netherlands, one of the world's top 500 brands, one of the world's most valuable brands, a large multinational company, invested by Philips (China)).
4 Sanyo Sanyo (started in 1947 in Japan, well-known trademark in China, Japan's largest conglomerate, Fortune 500 companies, Sanyo Electric (China)****).
5 JVC CD player (founded in 1927 in Japan, a subsidiary of Victor Grammophone Company in the United States, a famous brand in the industry, a Japanese brand, and a **** invested by JVC (China)).
6 Pioneer (founded in 1937 in Japan, a world-renowned brand, a leading brand in the world's audio-visual entertainment and optical disc technology, invested by Pioneer Electronics (China)).
7 BBK CD player (China Famous Trademark, China Famous Brand, Guangdong Famous Trademark, Industry Famous Brand, Guangdong High-tech Enterprise, Guangdong BBK Electronic Industry****).
8 Tecsun CD player.
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Anonymous users2024-02-09Great Wall, Kunlun, Uni-President, Lompal Compton, Shell, Mobil, Castrol, BP, Flow, ConocoPhillips, Dongfeng Castrol, Dongkang Lubricants.
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Anonymous users2024-02-08New Dirk, Mountain Spirit, Spark Bada Sound.
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Anonymous users2024-02-07The CD player accomplishes the above functions through a two-part structure, mechanical and circuitry. The mechanical part mainly refers to the movement, including the spindle, spindle motor, tracking guide rail, tracking motor and laser head assembly, etc., which work together to complete a series of tasks including tray in and out, disc loading and unloading, turntable, clamping, beam focusing and tracking.
The circuit part is mainly composed of laser head, signal processing, core servo, control display and power supply circuit, etc., to complete a series of work such as reading from the CD, signal conversion and processing.
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Anonymous users2024-02-06This up is not in the principle of popular science, it is pretending to be forced.
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Anonymous users2024-02-05As follows:
1. Sony Sony CD player.
Sony is a well-known Japanese multinational group, it was founded by Dai Ibuka in 1946, at that time mainly to produce audio equipment, because of a transistor radio in 1956 made the company famous, and quickly occupied the international market. Today's Sony product range is also constantly enriched, the most well-known are the audio equipment, computers, cameras of the three series.
2. Marantz CD player.
Marantz was founded by Saul BMarantz established the audio brand in 1953, due to the dissatisfaction with the best equipment on the market at that time, so it began to develop its own audio equipment, and through years of unremitting efforts, successfully developed a self-made amplifier, which also made Marantz known worldwide.
3. PhilipsCD machine.
Among the top 10 brands of the world's top CD players, Philips was founded by Antonio and Gerard Philips in 1891. The company started as a manufacturer of lighting equipment, and with the continuous expansion of the brand's reputation, the variety has also been enriched, covering a variety of household appliances and medical system products.
4. Panasonic CD player.
Panasonic is a large private enterprise in Japan and a world-renowned multinational group, with more than 200 companies around the world and a total of 300,000 employees. The company was founded in 1918 by Konosuke Matsushita, the famous "god of management" in Japan, and this year marks its 100th anniversary. And the brand has been committed to the research and development of various household appliances for many years, just to bring consumers the best life experience.
5. Sanyo CD player.
Sanyo is an electronics manufacturing company founded in 1947 by Toyo Ue, and is now part of the Panasonic Group. This company is a well-known and long-established company in Japan, and its mobile phones, cameras and other electronic products are also its proudest series, and for many years with excellent product quality has made it widely sold all over the world.
For the CD brand I can only recommend you three It seems to be very stable, Sony and Panasonic and South Korea's Avery and, others may be better, but in China I still haven't seen a better than them, for CD players Sony and Panasonic these two brands I still recommend Sony, in general his workmanship and technology is better than Panasonic, has recently made a comparison, for the tape machine Panasonic is better than Sony, but then out of the CD, Panasonic's development is still dumped by Sony,And now look at CD is generally based on Sony to evaluate a lot,I think when you buy these two brands of machines,The first thing you see is the style Sony is better than Panasonic,Then look at his handling or Sony's is much better,Sound quality,There are a lot of comments on the Internet,You can see,Sony is more sound dyeing phenomenon,And Panasonic is like a decent。 However, South Korea's Avery and I haven't tried it, so I'm good to explain to you, you can go and see if there are people who have used this machine to inquire, and I feel that there are very few Korean machines, and it is difficult to buy ......But in the past two years, it has continued to develop its products, and many people, even Sony and Panasonic, feel that its development is very violent, and it can almost reach the top of the Three Kingdoms! Go up and check out its machine! >>>More
The CD player was invented by Sony.
Although Sony launched a CD player as early as 1982, it was too expensive for few people to afford. In 1983, other companies launched CD players one after another, and the situation was very good, but this was only temporary. Most people are still addicted to the world of vinyl. >>>More
1. In terms of sound quality effect alone, there is little difference between D-NE20 830 730, mainly because the body material and appearance of D-NE20 are better. >>>More
Use a medical cotton swab dipped in absolute alcohol and wipe the laser head. The laser head is dirty for a long time and cannot read the disc.
The car is generally in CD format, and there are a lot of burning software, disc burning masters, and Nero can be.