How Do I Choose the Best Home Theater Preamp?

In general, home theater can be understood from the integration of two concepts, which are "Home Theater Standard" and "Playback System in Movies in Home Environment". The home theater market is adding another force.

home theater

The "Home Theater Standard" consists of the "General Specifications for Surround Sound Amplifiers for Home Theater" and "General Specifications for Combined Speaker Systems for Home Theater". The implementation of the two standards marks the end of the previous industry standard for home theater products in China.

People often say that the playback system mainly includes three major components, namely audio and video players, AV amplifiers, and speaker systems. The three lacked any playback system that could not be called a home theater. As a consumer, it is necessary to understand and understand these three parts. The author introduces these three parts in the playback system:

Audio and video player

We can find many in the market

High-end

As a projection device, the mobility performance of the TRT miniature projector is outstanding.

This is mainly reflected in three aspects: first, the miniature projector is light in weight and small in size, only the size of an ordinary mobile phone, can be fully agile in your hand, or conveniently placed in a pocket, and truly realizes easy mobile functions; second, the miniature The projector comes with a lithium-ion battery, and with a low power consumption of only 5W, it can easily achieve continuous 2.5 hours of projection work. Third, the micro projector is based on the Win CE operating system, which is itself a microcomputer without additional connection The computer can implement powerful presentation functions, not only can connect to DVD,

The growth rate of the home theater market is basically maintained at about 10%, and it is difficult for home theater to become a necessity in home consumption in the short term; while the second and third-tier cities and urban and rural home theater markets will become the main markets with growth potential. The consumer demand for professional audio is relatively stable, so the home theater market will continue to grow.

As the market continues to mature and brand concentration increases, competition among manufacturers will become more intense. Facing the pressure of small profits and the good momentum of the market, whether or not to create products that integrate innovative technologies and meet consumer needs is the core element for home theater manufacturers to achieve sustainable development.

In the next few years, the Chinese home theater market will continue to grow steadily. The rapid promotion of digital technology and

The treatment of the sound field environment is actually how to do a good acoustic design of the listening room. The following principles should be followed:

1. Select the appropriate room ratio, or make the walls non-parallel, or increase the diffusion to avoid or reduce the impact of standing waves.

2. The reverberation time is appropriate to make the critical distance as far as possible.

3. Absorb the reflected sound once to reduce the interference of the reflected sound to the direct sound.

4. Try to absorb the sound as much as possible. If the sound absorption cannot be achieved, diffuse the reflected sound as much as possible to make the sound field as uniform as possible.

For home theater, many friends think that home theater is a combination of display equipment, signal processing equipment, and audio. As long as these equipments are selected, they can achieve satisfactory theater results. It is often easy to overlook theater wiring and cable selection is a project that cannot be ignored.

The best time for theater wiring is before renovation. According to different living room environments, where are you expected to complete the installation of audio and video equipment, design the speaker placement, select the appropriate cable, and conceal

Clean contacts every six months

Soon after the metal is exposed to the air, the surface will oxidize. Even if the surface of the signal cable plug is gold-plated and in close contact with the body plug, over time, there will still be a certain degree of oxidation leading to poor contact, so it must be cleaned at most every six months. As long as the contacts are coated with cotton and alcohol, the contacts will be restored to the best contact after the heavy work, and the sound will be clear and transparent.

Try to avoid stacking machines

As far as possible, the most important CD source and sound reinforcement should be placed independently, because overlapping placement will cause resonance and affect the machine. When the speaker is playing music, the vibration of the air causes the equipment to follow the vibration, and the two machines will harmonize with each other when they are stacked, making the subtle information in the music blurred, and disturbing the transmission of various frequency bands, causing a sound pollution For example, if one of them is a CD player, the continuous rotation of the motor during the playback of the disc intensifies the amplitude of the harmonic vibration, and the impact is even greater. Therefore, the equipment should be placed on a stable rack independently.

Less interference, more beautiful sound

Household appliances and computers in the room should avoid sharing a set of power with the audio, and even if they are put together, they should get power from elsewhere. Secondly, tangling the wires will also cause the wires to absorb noise from each other and damage the sound quality. Regardless of equipment or connection lines, they should be kept free from interference from other electrical appliances or power lines.

Speaker placement

The placement of the speakers is an important part of the use of the audio. If not placed properly, the playback effect will be greatly reduced. How to find the best placement in the room is quite difficult. In addition to constantly listening to the effects of different placements, you can also ask relevant experts to give guidance.

Dim environment helps listening

Turning off the lights and listening to music is a habitual problem, but it has nothing to do with playback, but in a dark environment, the ears will be particularly sensitive, and it will reduce visual obstacles, reorganize the sound picture and the sense of position of the instrument It will feel particularly clear and clear, the atmosphere is far better than when it is turned on, and some other dim lights can be used to create a listening atmosphere.

Sound absorption should be appropriate

In the general home environment, the furniture and debris are already good. You don't need to make the sound absorption too complicated, and you can basically enhance the sound absorption effect by laying a carpet. In addition, the advantage of the carpet is that it can reduce the reflected sound of the floor and avoid mixing the sound from the front to cause turbidity. When the speaker is too close to the back wall, you can also consider adding a tapestry to increase the sound absorption effect, but you should not be too large, otherwise you may suck even the ultra high frequency. In addition, the glass and mirrors in the room will have a strong reflection of the sound, which needs to be covered with curtains to solve the problem. Friends with high requirements may wish to do more sound absorption at the corners and indoor sound reflection points, but pay attention to the sound absorption should not be excessive, the appropriate amount of reflected sound will help the sound lively.