1, THX certification Before understanding the purchase of various equipment, as an entry-level user, it is necessary to know what is THX certification, because this will play a big role in your purchase of equipment. THX certification is mainly to provide complete quality specifications for home audio-visual equipment. In 1982, George Lucas, the producer of the film Star Wars series, founded THX Studio and introduced THX certification service in 1990, covering home theater equipment, film and recording studios. The THX standard is different from the international standard. Most standards have a tolerance range, but THX does not have a tolerance. There is only one minimum requirement, which must be exceeded to pass the test, eliminating the artificial trickiness. Its purpose is to improve the sound quality of the movie in the cinema, so that the audience can fully feel the attempt of the director to express. An AV system consisting entirely of THX-sized equipment should be able to achieve the following effects (promotional product main product): full-range treble and bass; smoother and more natural sound; minimum bass distortion in the hearing range; clearer Vocal positioning.
THX-certified equipment is designed for the function of home theater. For the speaker, of course, the function of the home theater is fully considered. For the power amplifier, it should be full of power. For the audio-visual source, the quality of the image is above a certain level. The same is true, but there are many different levels of difference between the pre-decoding stage and the host. THX's contribution to the home theater is real. If the funding conditions, try THX models as much as possible, because these features are too worth the extra money to own. Welcome to China Home Theater Network
2, the ideal home theater speaker, in addition to the subwoofer, each channel is best to strive for consistency, although it does not force the main channel, center surround speakers in the appearance and volume of the exact same, but at least to ensure the unit, characteristics, The tone is consistent. If the built speakers are not from the same brand, there is a big difference between them in terms of shape and tone. Because most of the dynamic and attractive movies are recorded with surround sound effects. Dynamic sound effects include both moving sounds and dramatic changes in size and sound. In order to fully express the moving sound of the entire audiovisual space, a speaker with high consistency can do it.
As a home theater, the sound system must have at least 4 channels, which are left front, right front, left rear, and right rear. Better natural is 5 channels, 5 speakers form a surround speaker, it can express a lot of information outside the screen, such as an F15 fighter flying from the picture to the back of the audience, this time if you do not have a surround speaker you hear The sound will only be concentrated in front, it will not be true, or the picture is in a jungle, but you only hear the sound of various animals in front, and the silence behind, so that you can not feel the body Be imminent. The consistency requirements of the five speakers are unified. For example, the Boeing 747 is flying in front, but when it flies to you, it sounds like a small airplane, which is not good. If the selected speakers are inconsistent, it is easy to cause the above phenomenon. It should be noted that for the entry level, there is currently no speaker that combines dynamic and meticulous sound quality, that is, speakers suitable for listening to music will lack explosive power, while speakers suitable for watching movies are lacking in sound quality. . As for the coordination between the speakers, in the purchase process, it may be more practical to listen to, a lot of comparison.
We usually say that 5.1, 7.1 channel means more than 0.1 channel, that is the subwoofer, also called subwoofer, subwoofer. The main purpose is to supplement the low frequency of the whole speaker system. If your main speaker (5 or 7) is very strong, you can also disable it. At this time, you must turn off the decoder's bass. The signal is assigned to the main speaker. But for the small main speakers, adding a heavy bass can be a good rendering of the picture. When the big bang happens around, the feeling of shaking the mountain will be true, and the exciting deep water explosion in U571 will be true. If the theater replaces the subwoofer with a few bookshelves, it is obviously not very good. Welcome to China Home Theater Network
Usually, in the movie soundtrack, the energy of the subwoofer is mainly concentrated around 60Hz. Many movies even contain information as low as 20Hz. The highest sound pressure level in the field can reach 105dB, which can be said to be deafening. It can be said that the theater lacking a subwoofer is hard to say is complete. As for how to choose a subwoofer, simply speaking, the larger the woofer, the better, the size should not be less than 30cm, see the technical specifications, of course, to listen to the effect.
[page] 3, AV amplifiers Currently on the market, there are many AV amplifiers on the market. The high-end brands are mainly in Japan, Europe and America. Although there are high-end amplifiers in China, the number is not large. In general, the famous brand models in Europe and America are higher in grade, more powerful, and more expensive. Japanese products are only a few high-end products, and the mid-priced is more popular. Recently, many cheap models have been introduced. National products are mainly based on parity, and the quality is generally around 2000. Because of the emergence of Blu-ray (the main product of promotional products) and HD DVD players, amplifiers capable of coping with Blu-ray and HD DVD audio formats have also emerged. Currently, manufacturers of new-type amplifiers that support next-generation audio formats mainly have Onkyo. Tianlong and Pioneer three brands. The new amplifiers that support the next-generation audio format add a lot of new elements, the effect is better, but the price is also high, it is not recommended for entry-level cinema purchase.
For entry-level users, in general, you can choose a combined AV amplifier with built-in decoder.
However, the first is to determine the type of built-in decoder, AC-3 has become widely used with the recognition of the world film industry, its software DVD disc has gradually matured and will become the mainstream of the market. However, DTS is a somewhat superior surround sound system than AC-3, and the number of software is increasing. Therefore, it is more ideal to purchase an AV amplifier with built-in AC-3 and DTS dual decoder.
Secondly, it is very important to choose the appropriate output power. The rated output power of the AV amplifier should be determined according to the driving power required by the actual use of the speaker. Generally, the output power of the AV amplifier should be 1.5~2.0 of the rated power of the speaker used in the system. Times. High-power AV power amplifiers often use multiple pairs of power amplifier tubes and large-capacity power transformers, while low-power AV power amplifiers may use lower-cost power ICs for later stages. The method for determining the power output by the AV amplifier is: if the power amplifier's volume control knob only needs to be rotated to 1/3 of the maximum volume, the volume reproduced by the speaker can satisfy the actual listening needs, which means that The output power can meet the requirements of use, and it is more suitable.
Finally, if you have ample budget, choose a THX-certified AV amplifier. And to decide the tone and sound quality, it needs to be experienced. It is recommended to connect the speaker to the amplifier for actual audition, so it is best to buy speakers and amplifiers in the same company. You can exchange different combinations repeatedly to compare and listen until you choose your favorite sound.
4, the player opened Blu-ray and HD DVD does not say, DVD is currently the best audio and video source equipment, because it can well interpret Dolby Digital or dts sound. Many netizens think that enjoying music or CD is the best. Actually, the current SACD and DVD-Audio sound quality specifications exceed the CD and support multi-channel. CD can only provide two-channel stereo source. Same day. However, this is also a personal favorite. It is still recommended to buy a DVD to set up a theater. Some entry-level users want to choose a DVD in one step, and the selected DVD is compatible with all formats. At present, DVD can read MPEG1, MPEG2, MPEG4, EVD-specific formats, HDV-specific formats and FLASH audio and video formats as well as MP3, WMA, CD tracks, MIDI, HDCD and other audio formats. However, there is currently no DVD that has the ability to read all formats. And not all formats are commonly used, and the advanced reading format is not meaningful to everyone. Therefore, when purchasing a DVD, it is best to choose according to your own needs, otherwise it is a waste.
For home theater beginners, buying DVDs is a must-do. Discs can be borrowed from friends to see, after seeing it is worth saving and then decided to buy the original. However, it should be noted that pirated discs often have various defects, and their audio and video effects may be far less than the original products. You can also take a look at them. If you want to collect them, you should recommend the original version, because the storage time of pirated discs is usually used. It is shorter than the original.
[page] 5, display device display device types mainly include CRT TV, LCD TV, plasma TV, rear projection TV and projector. Due to size and resolution limitations, if you want to set up a home theater, CRT TVs can hardly take on the heavy responsibility.
LCD TV is the most popular display device in China. The main advantages are sharp image, long service life, high brightness and high resolution. The shortcoming is that the slow response speed can cause rapid image tailing and low contrast. There are already 108-inch LCD TVs for sale, but the price is sky-high. Welcome to China Home Theater Network
Plasma TVs appear earlier than liquid crystals and are very popular in foreign markets. The advantages are high color number, large screen size, high contrast, and no liquid crystal tailing. However, the brightness is low and the life is not as long as the LCD TV. The largest size is currently 103 inches. Large-size plasmas have an advantage over large-size LCD TVs.
In the days when flat-panel TVs such as liquid crystals and plasmas have not yet appeared, rear-projection TVs can be said to dominate the big-screen color TV market. However, under the strong impact of flat-panel TVs, rear-projection TVs have gradually been squeezed out of high-end circles, and prices are becoming more affordable. At present, there are several kinds of CRT rear projection, LCD liquid crystal rear projection, DLP optical display rear projection, etc., among which CRT rear projection is the most common. It is also very practical to choose a low-priced large-screen rear-projection TV as a display device.
Currently common projectors are LCD projectors and DLP projectors. LCD projectors have better color reproduction and high resolution. They are currently being applied in small commercial places at a price of 10,000 yuan or even less than 10,000 yuan, and are entering the family. DLP projectors have higher brightness and smoother screen switching, but the price of tens of thousands of dollars is too expensive for the average family. For entry-level home theaters, the 720P LCD projector is recommended to create realistic movie effects, and the color performance is a little more natural than DLP projection. The most important point is that the price is not high. The famous Panasonic AE900 and Sony PLV-EX4 Has fallen below 10,000 yuan.
There is no final conclusion as to which display device is best for building a home theater. It is entirely personal. However, one thing to remember is: try to choose 16:9, resolution 1366×720 or above, large-screen high-contrast display device, the viewing distance is about three times the height of the screen.
6. Equalizer In many audio-visual magazines, websites, forums, you will see the word "equalizer". What is an equalizer? The equalizer, as its name suggests, balances the balance of high, medium, and low sound. Its main function is to compensate for the shortcomings of the acoustic properties of the indoor space. A set of high-quality home theater audio system, at least the three channels in front and the subwoofer can not lack the audio and video equalizer. In terms of the equalizer, we mainly start from the four technical specifications of signal-to-noise ratio, dynamic range, frequency adjustment point and adjustment range. However, the equalizer is generally used for professional purposes, it is difficult for amateur players to make him good, but it is self-defeating. Therefore, it is not recommended to use entry-level fans.
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7, audio and video switcher to use audio-visual switch device, it means that your A / V source has been a lot, or a lot of rooms to be allocated. These types of equipment are often available in high-end models and are generally shared with the pre-decoding stage. For example, the pre-stage of PROCEED has its own decoding function and the function of synchronous switching of source A/V. This type of equipment can often replace the initial video selector with an AV amplifier. Summary: With so many choices of equipment, how much does it cost to configure a home theater system as an entry-level cinema? The author thinks that it is necessary to make different choices according to the actual economic ability and living environment of each person, and to formulate different matching plans according to their own different situations to purchase a home theater system suitable for them. At present, the advertisements of many dealers all agree that the word "as long as 998, home theater moves home", these combinations can be said to be inferior in quality, and it is not recommended for everyone to consider. A true home theater system is also the cheapest start-up type. All the equipments have a certain quality. The performance and quality of the products can also be guaranteed. The price of the whole set is about 3,000 yuan. I believe the general income. The family and the young single family can afford it. But the price of a truly entry-oriented home theater system is about 9000~12,000 yuan. The entry-level luxury suite home theater system costs about 17,000 yuan. It should be noted that entry-level cinemas should be matched with equipment produced by the same manufacturer. One is neat and uniform, and the second is visually better. Furthermore, the products produced by the same manufacturer, the color coordination between the various pieces of equipment, and the matching of the sounds are all carefully considered by the manufacturer in advance, so that they are both beautiful and convenient in terms of visual and use. If you choose a brand like East, pick a model in the West, it is not beautiful, and the tone is not too harmonious.
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