When using the sound system, there are several problems that are easily overlooked. This will have an impact on the life of the sound. Now teanma Xiaobian will analyze for you, which is easier for everyone to ignore. problem.
First, some new speakers need to be used for a period of time before they can exert its excellent performance. This is called "ç…²". Otherwise, its playback sound will appear too hard and too bright, or put it tightly. Do not open, this time process can vary greatly from speaker to speaker, ranging from tens of hours to dozens of days.
Recommend music for a few speakers:
The music used in the first stage: Zhao Peng's album "Editors' Choice". Time: 4 hours.
The music used in the second stage: Tsai Chin's song "The Forgotten Time" and "The Ferry". Time: 10 hours.
The music used in the third stage: Vitas "Opera 2", Enya "Only Time". Time: 10 hours.
The music used in the fourth stage: "99 Vienna New Year Concert". Time: 12 hours.
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’s hard to be ideal, and it’s not suitable for replaying pop 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, which can affect low-frequency control. In addition, the impedance of some speakers may be reduced to half the value at certain frequencies during actual operation. Therefore, it is best to choose a speaker with an impedance of 8Ω. (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 the larger speaker unit. Speakers, in order to get a good listening effect.
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 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, the upper one The unit replays the medium and low frequency, the so-called 2.5 frequency division, and the above shortcomings 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 mostly 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, the balance of the replayed sound is affected, and even the bass is banged, so in most cases, the nails are indispensable. Most of the pedestal speakers need to be equipped. A well-suited tripod is placed on the table cabinet at random. Due to the reflection of sound waves, the replay characteristics of the speaker are often changed. For the high-frequency unit, the mirror is symmetrically designed (ie, the high-frequency unit is not in the middle of the baffle). The high frequency unit should be biased to the inside.
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, Inadvertently brought to the speaker during use, 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, the distance from the back wall must be adjusted to obtain a normal and reasonable low frequency performance. If the distance is too close, the low frequency will generally be generated or The ambiguous sound, too far away, may make the low frequency insufficient. The speaker with the sound outlet on the front baffle can not worry about the reflection hole, even on the low cabinet.
Ten, the speaker is very susceptible to the acoustic characteristics of the room and the placement position. The speaker is placed in different space, its sound effect will be different. Even the same speaker, and the equalized playback system makes the same frequency response, as long as If the room size is different, the sound effect will be different.
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