Audio-visual room decoration experience sharing

November 04, 2020

Friends in the circle can say: "Beginner play equipment, intermediate play wire, advanced play space." Excellent listening space is indeed significant for improving the sound effect. Here are some suggestions for the decoration of the audio-visual room, and the construction of the sky in three steps.

The first step of power and wiring is foreseen

The audio-visual room has higher requirements on the power supply. It is best to take a few wires directly from the incoming line. The wiring in the power supply box of the audio-visual room should be separated from the outgoing line, and separated according to the direction and the current, and the rectangle is fixed, and the line card is used separately. There are still a few points to remind you: First, whether your audio-visual room plans to install central air-conditioning, and second, whether it will install a wireless remote control lighting system on the wall. If you have these plans, you should consider them in advance when planning.


In order to make the audio-visual room neat and tidy, it is convenient 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 air conditioner, refrigerator and telephone, so as to avoid mutual influence. The quality of all kinds of wire rods should be too hard to meet the normal use of 20 years as the bottom line, so as to avoid "opening the wall" or the floor due to wire quality problems.

The second step of acoustic processing is the key

The walls of the audio-visual room are generally decorated in accordance with the principle of “hard front wall, right and left side wall sound absorption, and rear wall diffusion”. 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 do a hard tune, 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 bookshelf, CD rack and other objects placed in the corner can greatly help the sound; The back wall of the position can be treated as both sound absorbing and diffusing. However, it is recommended that the seat is preferably 0.6m or more from the back wall, and the sound absorbing material is adhered to the diffusion plate, so that both absorption and diffusion can be achieved.

The floor of the living room is mostly marble, tile or wooden floor. Floors of tiles or stone are easier to clean, but they are also prone to high-frequency piercing. You can improve it by laying a thick carpet about 2m to 3.2m on the floor. Although the wooden floor is very suitable for the audio-visual room, it is too wasteful to put the wooden board directly on the concrete floor. The sound effect is similar to that of the tile floor. If the wooden floor is nailed into a cavity, it will be very frequent below 100Hz. Good absorption capacity, 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.

The ceiling is best equipped with both sound absorption and diffusion. There are three ways to recommend the ceiling here:

One is the light steel frame plus the mineral fiber board, which is effective for suppressing excessive indoor reverberation, but has no diffusion function;

The second is to use a small arc panel, the 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. ;

Third, the design of the small arc panel and the outer stretcher is 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.

The basic requirement for handling doors and windows is to have a certain sound insulation and sound absorption function, you can increase the weight and thickness of the door, and you can also fill the sound absorption material in the middle of the double door. Similarly, the windows of the audio-visual room can be transformed into two or even three-story glass windows, and the glass and the frame are connected by rubber strips. In the door seams and window joints, the sealing strip can be said to be the easiest way to sound insulation.

The third step is visual effect

In addition to listening to the sound effects, home theaters must also consider visual effects. For ease of operation, ceiling lights can be installed in the appropriate position in the listening room instead of fluorescent lamps, as the latter's ballast hum can cause noise interference in the listening environment. The theater should be fitted with dark, heavy curtains or shaded blinds to enhance the contrast of the video.

In addition, you can also consider the beautification of the audio-visual room environment, such as hanging a thick curtain behind the speaker, in addition to sound absorption will also give people a sense of facing the stage, but also some music content The art or musical instrument will give people a lot of thought and increase the artistic atmosphere. At the same time, proper arrangement of some evergreen foliage plants can make people feel comfortable.

Home theater "full body massage"

Home theater audio features

Home theater audio is also called AV audio. Its main function is to enjoy movies, karaoke and occasional listening to music with TVs and DVD players. It is very different from Hi-Fi's "high fidelity" design. AV audio is to make A (Audio audio) better match V (Video video), using multiple channels to create a sense of movement and envelopment. Because everyone is watching the film, most of the attention is drawn to the image.

AV audio is mainly composed of AV amplifier (commonly known as amplifier) ​​and more than 4 speakers (commonly known as speakers).

As the center of audio playback, the AV amplifier has surround sound decoding in addition to amplifying multi-channel audio power. At present, the most common decoding technologies for home theater are AC-3, DTS, and THX. AC-3 is the third generation digital decoding technology developed by Dolby, USA. It has 5.1 channel decoding function and can restore the film to 5.1 channel effect. DTS is a new digital cinema decoding better than AC-3. The technology also supports 5.1 channels, but each channel can be independently amplified; THX adds two surround channels to the 5.1 channel, forming a 7.1 channel, and the surround effect of the cinema effect is stronger. World-renowned power amplifier brands include Tianlong, Yamaha, Onkyo, Marantz, Sony and Luyao.

As we all know, the speaker is the key link that affects the sound effect. If you want to get a full-blown sound, you can say that 5 speakers are the lowest configuration: use a pair of front speakers to express the big dynamics, the main melody, use a mid-range sound to reproduce the character dialogue; use a pair of subwoofers To portray the bass effect. Famous speaker brands include American JBL, Ph.D., British Tianlang, B&W, Lefuhao, KEF, Danish Crown, Dynaudio, Zumbo and French Power Wave.

AV audio equipment placement

In addition to the space conditions, the audiovisual effect is closely related to the proper "occupation" of each speaker of the AV stereo. The center speaker is the main force for expressing human voice, and is usually placed directly above or below the TV screen. However, due to magnetic field interference and mutual vibration between the speaker and the TV, it is best placed on a separate stand slightly above the TV screen. The left and right main speakers need to be symmetrically distributed on both sides of the center speaker, and placed in a circular arc centered on the position of the listener. Their horizontal placement height is preferably 0.3 m above and below the center speaker in the center axis of the tweeter in the main speaker.

The surround speakers are mainly used to create the diffusibility and breadth of the sound field, so it is better to place it at a height of 50 cm above the head when the viewer sits down.

Since the bass directivity is very weak, there is generally no hard requirement for the placement of the woofer.

Everyone should not be free to place the sound. Please re-adjust the original furniture according to the above principles.

Use of equipment

The equipment cannot be placed inside the cabinet or the wall, because the resonance inside the cabinet will make the tone become turbid, and the equipment will be overheated due to poor air circulation; it is also not suitable to place the DVD player, amplifier and other equipment on top of each other, which will cause them to be Interfering with each other, resulting in a hard tone and a sense of oppression, the correct approach is to place the equipment on a layered audio stand or theater platform.

When you encounter the resonance generated by the loud volume of the speaker, you can transmit the vibration through the tripod and the nail that pierces the carpet to the ground, or fill the tripod with ferrosilicon sand or polyester resin particles to reduce resonance.

All wiring, input sockets and cable pulls should be carried out in the off state. Do not open the power amplifier to connect the speakers and plug in the sound source equipment. The positive and negative poles cannot be reversed when wiring. When using, the volume of the amplifier should not be too large to avoid overloading the speaker.

The order of booting various audio equipments is also very particular: first open the speakers, then open the DVD player, and finally the amplifier. The shutdown sequence is just the opposite. Never cut off all power at the same time.


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