Keywords: DIY headphone amplifier
Several questions now love to listen to music, more and more, in order to hear better voices, many friends have purchased a high quality sound source, such as high-grade sound card or HIFI entry-level CD set, but still We can not get in the eyes of high-quality sound performance. Where is the problem in the end? Listen to the stereo store high-end audio, left an indelible impression on many of my friends wanted to have had this experience it. Although you pay for, but they can build with a little performance similar system? HiFi headphones outstanding performance I believe many of my friends gave to surprise, but in many places will leave some unnerving Unfortunately, this question should be how to solve? Friends who pay attention to HIFI audio If you see the name of the name factory or master, observe the bile duct of the mirror smooth chassis and spirituality, listen to the softness of the soft alcohol, and may not help but speculate the internal structure. When housing is opened, and is not expected to see the interior of the circuit board, but few shelter of a crude copper mesh crisscross frame, individual components are welded neatly on the frame, then the wire connections between the respective colors , can not help but be amazed again and again. Experts say, such a technique is called scaffolding welding, lap welding for short, is both the most traditional, but also the best sound and the most artistic way. Maybe friends will think: I can not have such a work of art it? We hope that after reading this article, these questions can get valuable answers. The audio This is the case, if there is no circumference, the author's words, I hope to discuss with you and get an ax. Many of the following contents are involved in DIY. If you want to operate, please pay special attention to safety, doing it under the guidance of experienced friends. Because of the many variables involved in the actual circuit, so only strictly follow the necessary steps carefully and be patient and meticulous adjustment, will try to get good sound quality. Due to the specific circumstances are different and can not be fully taken into account, so please analyze specific issues, I just try to ensure that appropriate representations of real and without responsibility for the consequences to follow operations.
As we all know to find a solution, since the computer actually been applied to the development of audio technology continue to create for us a surprise, from 8bit to 44.1KHz / 16bit and then to 96KHz / 24bit, from mono to stereo and then to multi-channel, from MIDI to MP3 and then to APE and FLAC, and both stimulate our desire for listening enjoyment and the pursuit of sound quality. It should be said that with the "hair burning" sound card innovation AWE64GOLD and Emperor MX200, a group of fanatical computer audio enthusiasts began to form, and the computer has become a music appreciation center of many friends. For many fanatical love of music friends, real audio technology to bring them the greatest happiness is when the APE format is widely used - from law-abiding, 44.1KHz, 16bit, stereo and lossless compression (96KHz, 24bit and multi-channel high targets, although this is more able to attract people's eyes, but we can only enjoy the music from record companies, and SACD and DVD-Audio high prices that we can not easily afford; in fact, experts have also said, When the sound of the CD is getting wonderful when getting better playback). From this beginning, we can enjoy the original sound to the CD on your computer, previously had to endure MP3 and CD Walkman "ESP" compression can finally be thrown to the winds. With hard disk capacity upgrading and updating, we can be stored under a lot of high-quality music files for listening at any time. In the ensuing demand stimulus, major speaker manufacturers began to set off a sound card and a high-quality audio playback for the climax of product development, even some traditional HiFi just hang around in the field during the previous vendors to join in. For a time Philips 70x, black gold Ⅱ, black gold Cannon, Envy24 series, DMXFire1024, RME9624 and Cruiser R1900Ⅱ, Swans M200, generations V500, dew, send E Friends Star / Black Diamond and so people pick dazzled, and even did not belong HiFi headphones in the computer audio field have gradually become more and more new friends. For a time, computer audio situation seems to be excellent. But, but, we carefully listen to music on their own well with a computer audio systems, but found the sound more or less some problems: high frequency less supple and delicate, and some stiff dry; IF less transparent supple, and some dyeing muffled; low frequencies are less compact, rugged, and some loose cloudy. Experiment to audition Diana Krall interpretation of "Temptation", Kari Bremnes's "A lover in Berlin" or Amanda McBroom's "Make me a kite", maybe you will find that these problems do not stop mentioned earlier, after all these Deductors and recording are almost impeccable. Where is the problem? Maybe my friends have discovered, often at the same price, headphones sound better than the performance of multimedia speakers. Such a situation has arisen partly because the same unit cost of the headset can do better than the speaker unit; the other is for reasons amplifier because power is usually much larger than the headphone speakers needed in cost and volume (need to put into the speaker box) under the double limit is difficult to make people satisfied with the amplifier. So many of my friends also connect headphones as an option. But after the purchase of more high-end headphones with a good sound card, many of my friends also found the problem has not been fully resolved, in large part because of lack of amplification circuit is also on the card: the vast majority of sound amplification circuit just one integrated operational amplifier. Just from the indicators, many integrated operational amplifier quiescent current of less than 10mA, this way, when the direct promotion of integrated operations on many headphones sound amplifiers at low pressure and type A and B work state, which is in the computer audio system inside the sound quality is a problem many unfavorable factors affecting considerable. Since I found a big problem, we should have medicine for the disease. Internet search found, headphone amplifier products, programs and circuits have many friends who I consider to follow DIY one, feel one taste; even if it is not going to do it yourself, refer to the values and the will to believe. Perhaps the face of such a huge DIY project, my friends could not help a little timid. But don't worry, let's start with a specific example, step by step, how to start DIY from scratch, from the technical foundation to the purchase component, will be involved, if you follow these necessary steps, I believe victory will be in sight. overall appearance
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