[Home Theater Network HDAV.com.cn] Since you have decided to set up your own home theater, then you must have a preliminary understanding of it, you should know that every detail determines its effect in the later application. Today, I combine my own experience and knowledge gained from others to give you an article about what to pay attention to in home theater decoration design. There may be some shortcomings in some places. I know that I can add them at any time. Everything is for the same audio and video enthusiasts as you and me.
First, where to use
If you want to build a home theater, what should you consider first, is it a machine? No, it should be where you want to use it, or you can say how you want to use it in your own room, living room, or professional Audio-visual room. If it is in your own room (personal is not recommended, can't hear the effect), if it is in the living room (considering the light, the light is very good, you can choose the big screen TV, if the light is darker, it is better to be the projector, this is just the general In the case, if the funds are sufficient, you can do it at will) if you are in a professional audio-visual room (the first thing to consider is how much the budget is, so you can do more with less).
Second, the size of the area
The size of the home theater area determines which devices you can choose. The area should be no less than 10 square meters (the sound quality can not be heard), and the maximum area should not exceed 50 square meters (the extra expenses are not one and a half points).
Third, the proportion of audio-visual rooms
Do not choose the room with the length, width and height ratio is an integer multiple of the room. Otherwise, the professional equipment will be greatly reduced due to the influence of the standing wave. The best ratio of each side of the room should be 1:1.6:2.5 or 1:1.25. :1.6, this is only an ideal state. In the end, as long as the two sides of the length, width and height are not integral, the sound quality can be compensated for by the acoustic treatment. At the same time, the wall in the room must be parallel. Reducing the standing wave,
Fourth, acoustic treatment
Jiansheng is one of the most important aspects of home theater design and decoration. The most important thing is whether the home theater can show perfect acoustic effects. Just look at this step.
The walls of the home theater audio-visual room are generally decorated in accordance with the principle of “the front wall is hard, the left and right side walls are sound-absorbing, and the rear wall is diffusedâ€. The left and right side walls must be sound-absorbed to ensure clear sound and pure sound. Some 1m to 1.5m wide and 2m high terry cloth or wool blanket can be placed on the side wall between the speaker and the listening position; To be hard, you can save a certain low frequency, so that the low frequency can extend forward better; the corner is the strongest place for standing waves, and the special objects such as bookshelf and CD rack can help the sound. The back wall of the listening position can be treated as sound absorption and diffusion. However, it is recommended that the seat is preferably 0.6m or more from the rear wall, and the sound absorbing material is adhered to the diffusion plate, so that the sound can be absorbed and diffused.
The floor should also be treated with sound absorption. If the floor is tile or cement, it can be improved by laying a thick carpet about 2m~3.2m. Although the wooden floor is very suitable for the audio-visual room, it is wasteful if the wooden board is directly laid on the concrete floor. On the other hand, the sound effect is similar to that of the tile floor; if the wooden floor is nailed into a cavity, it will have a good absorption capacity below 100 Hz, and the low frequency effect of the sound will be very good. If you can put pebbles under the floor, you can just fill the gap that is easy to cause standing waves and resonance, and even the drawbacks of the cavity wood floor can be overcome.
We recommend three methods of ceiling to achieve both sound absorption and diffusion: First, light steel frame plus mineral fiber board, it is effective for resisting excessive indoor reverberation, but no diffusion function; second, using small arc panel PVC paper is attached to the downward side of the arc, and the concave side is glued with sound-absorbing cotton. This design not only has the function of absorption and diffusion, but also does not form a cavity for absorbing low-frequency; The design of the arc panel and the outer stretcher is both beautiful and practical. There are also enthusiasts who are covered with sound-absorbing cotton on the ceiling of the ceiling and fixed with wooden strips. The pipeline can pass through the ceiling.
Sound insulation and sound absorption treatment of doors and windows: the weight and thickness of the door can be increased, and the sound absorbing material can also be filled in the middle of the double door. The windows can also be converted into two or even three glazed windows, which are then joined by a rubber strip between the glass and the frame. In the door seams and window joints, the sealing strip can be said to be the easiest way to sound insulation.
5. How to allocate home theater expenses
Just getting started can choose to use 20,000 yuan as the budget for the home theater, because if you invest a lot at the beginning, it may cause waste. You don't know how to maintain these high-precision instruments. It may not take long for damage due to various reasons. A lot of oh, but also delayed your time. In fact, the 20,000-dollar home theater is a good learning stage. In the later period, you will know how to redistribute funds to purchase more advanced equipment.
Sixth, wire and wiring
The wire is still selected according to the specific situation (it is something that advanced players can play, what is advanced player, that is, friends who know how to do it and have money), it is best to choose foreign old-fashioned audio amplifier projection display wire, such as Mengpai, Epson, etc. Domestic products you know. Choose equipment based on your home theater design, and then we can make wiring. In order to make the home theater simple and beautiful, it is easy to install and operate in the future. It is necessary to pre-bury the pipeline and port on the six-sided wall during the decoration. When the line is pre-buried, the special signal line should be wrapped with PVC pipe and separated from the lines of the air conditioner, refrigerator and telephone, and the wires should be routed separately to avoid mutual influence. The quality of various wires should be better to meet the long-term use, so as to avoid "opening the wall" or the floor due to wire quality problems in the future. It is best to draw a few wires directly from the incoming line directly from the home theater audio-visual room. The upper line in the power supply box of the audio-visual room should be separated from the outgoing line, and separated by the distance of each current and rectangular, and fixed by the line card.
Seven, home theater matching skills
Generally, home theater audio can be divided into two types, one is 5.1 channel, and the other is 7.1 channel. The 5.1 channel is 2 front main speakers, 1 center speaker, 2 rear surround speakers, and the other 0.1 channel is a subwoofer, which is placed at any position. The 7.1 channel is based on the 5.1, plus two sides of the surround, to use the second era of Kung Fu, is still relatively expensive. Side surrounds also need to be buried, but depending on the layout of the living room, whether there are walls to walk. If the living room width is less than 4.5 meters, it is recommended not to consider 7.1. In fact, the effect of 5.1 is already very good.
The power of the speaker should match the power amplifier and the room size. The power matching here is not simply the matching of the speaker and the power amplifier. It should fully consider the resistance, sensitivity, maximum sound pressure level and other parameters. Well, in fact, there are a lot of knowledge in the home theater. It seems to be simple. Only after fully understanding the relevant knowledge can we make the least amount of money to create an effect.
Various factors will affect the optimal performance of the system to varying degrees. In combination, we must pay enough attention to the following aspects:
(1) Room size and structure of the home theater system
(2) The distance from the viewing position to the TV screen
(3) Acoustic characteristics of the room
(4) Influence of ambient light on video display
(5) Select projector or big screen TV
(6) Whether the speaker is placed on the wall or on the floor
(7) Placement of each unit of the system
(8) Ventilation of the system equipment placement environment After considering the above factors, it may be possible to clearly know what kind of room size and structure can maximize the home theater style.
Eight, debugging
When the equipment is in place, the commissioning can begin after the installation is complete. There is no sound, no picture, you need to carefully understand the function of each piece of equipment. So what debugging do you change?
(1) Low-frequency debugging: Because the distance between the walls of the home theater room is relatively close, it is easy for the low-frequency sound waves to form multiple rebounds between the opposite wall surfaces like the ball, causing the low-frequency sound quality to be turbid and creaking. Not only affects the clarity of the medium and high frequency sound quality, but also can cause hearing fatigue after listening for a long time. HAA TurboCal debugging technology combined with QSC's top digital equalization processor DSP-4 can effectively improve the dynamic range of the subwoofer, improve the comfort of low-frequency listening, and make the viewing of movies and music programs more powerful.
(2) Overall audio debugging: By performing instrument testing on each seat and each speaker, the imbalance generated by each speaker in the room is corrected to ensure that each seat sounds like an emperor.
(3) Overall video debugging: Any projector that has just been shipped from the factory is only a factory state, and its effect is only about 20-40%. By using professional instruments, we will debug a picture quality as close as possible to the picture itself. That is to use the maximum display performance of the projector, so that when you enjoy any video programs and pictures, there will be a perfect sense of restoration.
More fresh and fun home theater information, please pay attention to home theater network http:// (WeChat: cnhifi), the country's most influential home theater audio player interactive media website.
Note: This article is transferred from the HD era. Author: youth who are not confused. The article is an independent view of the author and does not represent the position of the home theater network.
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