| Foreword: [Today's entertainment city investors know how to shop around. In order to select "price and good quality" or the best audio equipment, some investors will distribute "hero posts" when the venue is decorated, so that all audio companies or manufacturers who are willing to participate will go to PK. In order to select a good sound suitable for their own place, the investors can be described as different ideas. In the absence of a shady scene, it is usually the case that many audio companies move the audio equipment to the venue, in a room or in each room according to a room, after the various sounds are adjusted, the so-called "jury" organized by the investors. Let's try the audition one by one to identify the pros and cons. This form of PK can be called "soft PK", just like the domestic martial arts competition in the early years - each "Wulin master" plays a routine, the judges look at which posture is beautiful, the action is strong and gives a high Points, so let some "flowers and embroidered legs" get "national championship" with their skill, appearance and body. In fact, this soft PK of sound is not scientific or very reasonable. Because the size, layout, and decorative materials of the room all affect the characteristics and performance of the sound, most of the effects are negative without a reasonable sound field. Sometimes, even if the speakers are placed in different locations in the same room, the listening experience is different. Some people think: Isn't there a tuning device that can adjust the room defects? Yes, if the speaker sound standard, using an equalizer or a processor with parametric equalization, plus engineering personnel's technical clearance, then of course, the sound field environment may also adjust the sound of the sound. But in many cases, it is impossible for investors to buy a processor for each room in order to save money. Imagine: How can we overcome the various sound field defects in the room by relying on a simple karaoke merger machine? What is the best sound quality? So when some audio equipment is selected for a room that suits its characteristics, it will sound very good. However, some audio reluctantly "divide" into a room that is not suitable for its characteristics, then its sound will be much worse. In addition, the human ear will also be aesthetically tired, and the scorpion will be tired. After listening to and singing four or five rooms in a row, even experienced experts will influence their judgment due to factors such as fatigue or emotion. If you do more PK in a few batches and days, then it may be harder to pick the best sound. Because in reality, people simply can't remember the subtle differences between the sounds they've heard in the first few days and the sounds they've heard. Some engineering companies say: "PK is not a sound but a relationship." This is not without reason! After several days and several rounds of PK, some “experts†and the heads of the investors were even upset when they were tired to hear the sound. Some investors have initially hoped that more audio manufacturers will participate, but PK is in the middle of the stage, but even the audio company's phone is not willing to pick up - in fact, he does not want to find more audio to compare, but he does After losing the direction of aesthetic fatigue, I even felt that the sound is almost the same. Who is better, but ultimately, not only did not choose a better sound, but instead of violating the original intention to let the sound company with good relationship or promotion ability to take over the project. List, even if their sound may not be very good! In fact, if the "soft PK" method is used, in addition to the relationship that can influence the choice of the investor, the technology can also be opportunistic. |
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So, how can you pick the best sound that suits you best?
In fact, the correct and effective method is very simple: firstly from the terminal sounding equipment that has the greatest influence on sound quality and tone color, the speaker starts, because the sound quality and sound quality of the sound system are good or bad, the speaker accounts for about 70% of the sound, and the sound system Whether it can work stably for a long time is also related to whether the power and design of the speaker are reasonable.
I have summarized some experiences and a simple method in the career of the musicians and DJs to professional audio engineers for nearly 20 years. The specific operations are as follows:
First, prepare a machine for selecting equipment (also known as PK machine, you can use the remote control to directly switch one or a group of speakers and amplifiers), or prepare a set of similar PK lines (PK line practice) See later), in the same venue, put the speakers in almost the same position, use the same source, the same preamp, the same or a few different categories of songs, the same amplifier (preferably the power of the professional) Amplifier), the same channel instantly switches the power, tone quality and sensitivity of the PK speaker. The PK's pre-stage high school bass is hit to the 12 o'clock position (ie, no adjustment), and the direct-out method is used for comparison. Because if you don't adjust, you can listen to it, then fine-tuning is better to listen to better singing. Remember: the audio source (CD player or VOD song computer) two channel output terminals should be inserted into a two-in-one lotus head, only one line is used to connect the amplifier, because modern recordings often record different sounds separately. Channel, so the sound of the left and right channels is not the same, the so-called "left side of the ring to the right"! If you use two left and right signal lines to connect to the power amplifier at the same time, it is unfair and unreasonable to switch the two PK speakers with the two channels of the power amplifier.
The advantages and disadvantages of the speaker can be measured from the following aspects:
1. The sound quality of the speaker is good (clear, soft, clean, and well-defined), the standard of the sound (bright, natural, balanced) and the high degree of reduction is good, and vice versa. It is best to use the sounds that you are familiar with, and usually use the original popular songs in Europe and America, because the music elements of this type of songs include vocals, jazz drums, electric pianos, basses, guitars, etc. All sounds from the 40Hz to 20KHz band. The vocals can only test the high school bass, not to the super high pitch and the subwoofer frequency. If you want to test the performance of super high and super bass, you can use electronic dance music or a pure live version of the jazz drum to match the bass. .
In addition, your own voice is the best audition tool, just need to sing in order from -5-6--7-1--2-3--4-5-- (of course, you must first ensure yourself The singer does not go out.) These notes are available from low to high frequency bands. Singing once is equivalent to detecting the contrast and pitch of the two speakers. You can switch to the B-speaker to audition after the whole stage of the A speaker, or you can switch to the B-speaker to sing the same sound after the A speaker sings a voice, so you can switch between the instant and the comparison to win or lose.
Usually, the speaker with reasonable design and balanced frequency response curve sings the human voice easily and naturally, and the balance is smooth. However, the speaker with unreasonable design and unbalanced frequency response curve sings naturally, and some sounds are too sung. It stands out and feels weird, and some sounds are very laborious to sing.
In practice, the overly prominent sound is due to the peak of the speaker's frequency response curve. The peak of this ridge is the easiest to make the microphone whistle (flying microphone), and the singer is because the frequency response curve of the frequency band has Deep valley (ie lack of sound). "Peak and deep valley" are all taboos of sound, directly destroying the balance of music and natural beauty.
Test to understand the sound characteristics of the speaker In addition to the vocals, musical instruments, and comprehensive songs, it is also very reasonable to test the speakers in a self-singing manner, because people know the sound and characteristics of their own voices. Don't think that only the singer-level people can identify the sound, because these speakers will be used to meet the needs of ordinary people singing and entertainment! Ordinary people may not be able to sing very well, but what is called "singing well" and what is "good singing" still understands.
2, the speaker sensitivity is higher than the sensitivity is better. Because the speaker with high sensitivity is easy to push, the speaker with low sensitivity needs more power of the amplifier to push, consume power and increase instability.
The sensitivity of the speaker is the same as that of the same amplifier, the same channel, and the same source. The sound with high sensitivity and the low sensitivity must be small.
3, the speaker power is larger than the power is better. Because the power of the speaker can withstand a large power, it is more stable, even if it is loud, it is not distorted, it is not easy to burn out, and the power of the speaker is slightly louder, it will be distorted and easy to burn out. Test power can be detected with strong rhythm of dance music as follows:
A: First switch the PK machine or PK line to one of the speakers. After the song is ringing, slowly rotate the amplifier volume knob from left to right by hand to listen to the distortion performance of the speaker. When you feel the obvious distortion sound, remember The position of the amplifier volume knob and the loudness of the live sound quickly reset the volume knob to zero.
B: Switch the PK machine or PK line to another speaker, repeat the above operation, see which speaker can withstand more power, which speaker is louder and more powerful without distortion, and the power is large. The sound of the speaker will be louder and louder, and the power will be small and the sound will be insufficient. Normally, it illuminates red when the amplifier self-tests that the signal is distorted.
C: If possible, the speaker can be disassembled to check the contrast speaker unit - the power of the large magnet and the voice coil is absolutely large, and the power of the small magnetic coil is also small.
4. The speaker has high sensitivity and high power, high cost, high reliability, high reliability, low sensitivity and low power. The speaker has low cost, slightly poor stability and low use value.
5, the sound quality of the private room speaker is clear, soft, the sound is true and natural, bright, singing is easy and not screaming (commonly known as: Fei Mi), but vice versa. As a private room speaker, the performance of the microphone vocals is very important. It is better to sing easier than to sing hard, because the general public does not necessarily understand music or art, but the speakers are good to sing, the vocals are easy to sing, then Most people know it.
6, the frequency response width must be better than the frequency response is narrow. For example: A speaker's frequency response from 43 ~ 18KHz, and B speaker is 50 ~ 16KHz, then the sense of hearing must be A speaker is lower, more delicate, as if you can hear more music elements, compared to the instant switching It can be seen that the B speaker may feel "listen to some music elements" and may have some exciting "Aura".
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