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 work seamlessly, so as to achieve the best state. How to choose the sound in the establishment of a home theater?
1. Testing low-frequency quality The low-frequency speakers produced by the low-frequency speaker can be astounding, but it is completely bloated and loose, lacking layering and solid feeling. Good low frequency should be clean and bright, with distinct layers, no muddy water, and no sorrow, even if various low-frequency instruments such as drums, bass guitars 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. Testing the IF vocal vocals is the most commonly heard voice. 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. The inferior high-frequency is squeaky and squeaky, and people can hear the headache. In extreme cases, the violin or soprano sound becomes the sharp noise of the brakes. Similarly, different instruments in the treble produce different textures, and good treble can be distinguished. The high frequency of the superior and inferior level can even distinguish the different phonographs played by two different woods of different years. 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 accent (of course not based on the recording of the singer)
4. Test high volume and sound field image Some speakers are stable at low volume, but when the volume is raised to an index, it will be distorted, or “shooting edgeâ€, and various non-recorded music signals appear. However, the volume at 12 o'clock is 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.
There are also some small speaker knowledge that you usually don't pay attention to:
First, some new speakers need to be used for a period of time before they can exert 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.
Second, the small bookshelf speaker due to physical limitations, its bass dynamic range can not be too large, so even if its low frequency extends very low, its practical significance is not large, visible low frequency lower limit of the pursuit of small speakers, the actual effect It is difficult to be ideal, and it is not suitable for the replay of bursting music.
Third, the nominal impedance of the speaker is commonly 4Ω and 8Ω, 4Ω impedance speaker, although the power amplifier can output more power, but because the impedance is lower, the output current capability of the power amplifier is high, this pair Some power amplifiers with small power supply margins tend to cause increased distortion, and low-impedance speakers are detrimental to damping and affect low-frequency control. In addition, the impedance of some speakers may be reduced to half the value at some frequencies during actual operation, so it is better to select a speaker with an impedance of 8 Ω. (For example, the load impedance of many AV amplifiers cannot be lower than 6Ω)
Fourth, the speaker of the small-caliber speaker unit can achieve very good listening effect, but this kind of speaker is only suitable for close-range 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. Welcome to China Home Theater Network
5. 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. Small, but its mid-band integrated frequency characteristics tend to produce low valleys, and the vertical direction is narrow, so its midrange 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.
6. Double-line sound-receiving speaker with 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 The effect of low-frequency replay is often lost due to the effect of parallel connection or copper.
Seven, the floor-standing speakers are placed on the ground, but often due to the resonance of the ground affects the balance of the replay sound, and even caused the bass to bang, so in most cases, the nail is 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.
8. Between the speaker and the stand, it is best to use three small pieces of foam double-sided tape, which is glued to the bottom of the speaker in a triangular position, and then placed on the stand, so that the speaker has a certain adhesion to the stand. Otherwise, the speaker is accidentally brought to the speaker, and the speaker is easy to slide out of the tripod and fall to the ground and fall.
9. The bass reflex speaker set on the rear baffle of the speaker, and the distance from the back wall must be adjusted to obtain normal and reasonable low frequency performance. If the distance is too close, it will usually produce too much low frequency or ambiguous sound. If the distance is too far, the low frequency may be insufficient. The speaker with the sound outlet on the front baffle can be used without worrying about the reflection hole, even on the low cabinet.
Ten, the speaker is extremely susceptible to the acoustic characteristics of the room and the placement position. The speakers are placed in different space environments and their sound effects will be different. Even if the same speaker, and the equalized playback system has the same frequency response, as long as the room size is different, the sound effect will be different.
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