[Home Theater Network HDAV.com.cn] How to choose the sound when setting up a home theater? In the process of building a home theater, each part should be carefully selected, the most important thing is to be able to match the seamless, so as to achieve the best state. So how do you choose the sound in setting up a home theater?
Home theater system selection skills
1, test the quality of low frequency
The low frequencies produced by inferior speakers can be astounding, but they are completely bloated, lacking in layering and solidity. Good low frequency should be clean and bright, layered, and will not drag the water, even if the various low-frequency instruments such as the size of the drum sound, bass guitar and piano bass, can be easily distinguished. So don't be fooled by the low-frequency sense, the inferior low-frequency is not as comfortable as the clean sound.
2, test the IF vocals
Vocals are the most commonly heard voices. The pros and cons are not difficult to detect. Pay attention to whether the vocals have unusual nasal sounds or the feeling of being snorted. The "box sound" of some speakers will also greatly interfere with the intermediate frequency, making the sound of this band ambiguous. IF sound is more serious than other frequencies, because most of the audible frequencies, or the frequency of the music, are concentrated in the mid-range, which is a replay for almost all types of music. Obstacles.
3, test the high frequency flexibility
Inferior high-frequency is squeaky, hearing people's headaches, in extreme cases, the violin or soprano's melody becomes the sharp noise of the brakes. Similarly, different instruments in the treble produce different textures, and good treble can be distinguished. The easiest thing to master is that good treble is not audible and fearful, the pores are erected, and it is not too tiring, and it is soft and flexible, smooth and layered. Up to the highest point is still easy to hear but does not produce a change.
4, test high volume and sound field image
Some speakers are stable at low volume, but they are distorted when the volume is raised to an index, or “shootingâ€, and various non-recorded music signals appear (with a 12-point volume as a safe test standard). Specifically, if the orchestra is one of the favorite, you must pass this level. The standard-compliant speakers make the sound out of the box to a certain extent, creating a clear sound field and image, showing the position and texture of the different instruments, and having sufficient diffusion to grow, wide and high audio space.
The mute and the tail should be clearly heard, and in the case of large volume and "big burst" without distortion, the vocals and instrumental sounds will not be entangled. The high-quality replay can show a rich sense of music and air, and the bounce of the notes, like the clouds and see the sky, showing the whole sequence of audio and video. More directly, it will not be exhausting when you listen for a long time.
Some new speakers need to be used for a period of time before they can perform their excellent performance. This is called “煲â€. Otherwise, its playback sound will appear too hard and too bright, or can not be opened, this time process can vary greatly from speaker to speaker, ranging from tens of hours to dozens of days.
Due to physical limitations, the small bookshelf speaker can't be too dynamic, so even if its low frequency extends very low, its practical significance is not great. It can be seen that the low-frequency lower limit of the small speaker is difficult to achieve. Ideal, it is not suitable for the replay of bursting music.
The nominal impedance of the speaker is usually 4Ω and 8Ω. The speaker with 4Ω impedance can make the power amplifier output more power. However, due to the low impedance, the output current capability of the power amplifier is high. A power amplifier with a small margin tends to cause an increase in distortion, and a low-impedance speaker is detrimental to damping, which affects low-frequency control. In addition, the impedance of some speakers may be reduced to half the value at certain frequencies during actual operation, so it is best to select a speaker with an impedance of 8 Ω. (For example, the load impedance of many AV amplifiers cannot be lower than 6Ω)
Small-caliber speaker units can achieve very good listening, but they are only suitable for close-up listening. For rooms with larger space, such as the sound of the hall, you should choose a large speaker with a larger caliber speaker unit to get a good listening effect.
The dumbbell type speaker adopts two identical low-frequency speaker units, and is symmetrically arranged on both sides of the high-frequency unit, which can achieve better low-frequency and transient response, high sensitivity and power bearing capacity, and large dynamic nonlinear distortion. However, its mid-band integrated frequency characteristics tend to produce low valleys, and the vertical direction is narrow, so its mid-range performance should be noted. However, some of the lower units of the dumbbell type speakers are only used to reproduce the low frequency, and the upper unit is used to reproduce the medium and low frequency, which is called the 2.5 frequency division. The above disadvantages can be overcome.
The two-line sounding speaker has two sets of speaker terminals. For common connection, the two sets of terminals are connected in parallel. At this time, the speaker line must be connected to the pair of terminals of the low-frequency unit. Otherwise, the two sets of terminals are used in parallel. The effect of the connection or the copper piece, the effect of the low frequency replay is mostly lost.
The floor-standing speakers are placed on the ground, but often the balance of the replayed sound is affected by the resonance of the ground, and even the bass is banged, so in most cases, the nails are indispensable. Most of the frame speakers need to be equipped with a suitable height stand, which can be placed on the table cabinet at will. Due to the reflection of sound waves, the replay characteristics of the speakers are often changed. For the high-frequency unit, the mirror is symmetrically designed (that is, the high-frequency unit is not in the middle of the baffle), and the high-frequency unit is biased to the inner side when the position is placed. 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 love video. Author: Lone Star singing alone. The article is an independent view of the author and does not represent the position of the home theater network.
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