How to choose an ideal speaker
As a speaker that converts electrical signals into acoustic signals so that people can hear the sound, it is the most important component in a home theater or stereo playback device. It not only occupies a larger share of the total investment ratio, but also The most difficult to buy among audio and AV equipment. The reason is that there are thousands of brands of speakers, which seem to make people at a loss, and they are even more afraid to start. However, the speakers are by no means unavailable and can be judged by playing music, and we can choose good speakers with satisfactory prices and reasonable prices. As the saying goes, "It's a mule is a horse, so you have to pull it out." The speakers also have to be put out to listen to, with listening as the selected speaker! Here we mainly introduce the purchase of speakers in the two-channel and stereo systems. As for the front main speakers, center speakers, surround speakers and home theater Although the subwoofer has additional emphasis on the selection criteria, it still meets the following principles, that is, any speaker that can play back good music will naturally perform well when replaying movie music.
1. Natural tone balance First, the sound reproduction of the speakers should be true. The replayed vocals and instrumental sounds should be as close to the original sound as possible without any distortion. In this regard, perhaps the main criterion is that there should be precise tonal balance. The sound you hear should be smooth and silent (it should be remembered that most speakers will always have a slight drop in low frequency response), and the strongest and weakest sounds (peaks and valleys) that are not audible. The mid-band and treble should not be too loud or stubborn to let go. You can find some instrumental music with a wide frequency range (such as piano music) for recording. Pay attention to the change of timbre when listening to low, medium and high scales. Speakers in the speaker cabinet are well coordinated and combined, the cabinet and crossover network design are good and the scattering characteristics are good, the sound effect is much better than the design of some defective speakers. For example, when you can always hear the tweeter seems to be playing alone, you can be sure that this speaker has some problems.
Second, the sound characteristics Although the overall sound characteristics of the speaker is very important, but a good speaker should also have a good performance frequency balance in the following special occasions: you can listen to the sound of different frequency bands in turn. The bass to be heard should be compact and clear, with a precise tone, no buzzing, no muddy or ambiguity; the midrange as the main part of the music is more important, the vocals and instrumental sounds should be natural and detailed, It should not be too loud or dull, nor too bright or too light, and the treble should be wide, airy and extensible, without screaming or fading.
Resolution: Listen carefully if you can hear the details in the music, such as the decline of the cymbals or piano sounds, and the hall sounds in the concert hall or jazz club. If the details of the low level cannot be heard clearly, it means that the speaker lacks transparency. In order to achieve a true and satisfactory playback effect, the resolution at low levels is crucial. This is also the difference between good speakers and crappy speakers.
Transient response: The speaker should be able to reproduce the transient in music. The sound response when just strumming a string drum or just dialing a guitar is strong and accurate. It cannot be "surprising", "excited" or "slow" and "slow". In addition, naturally fading sounds, such as cymbal and "tailing" of speech, should be gradually attenuated and not stopped abruptly.
Dynamic range: The sound replay conditions at low and high levels of dynamics should be compared. Ideally, the speakers should be able to replay continuously from the lowest sound to the strongest orchestral segment field, and it will not make the silent part difficult to hear or the loud section.
Sound image localization and sound field (stereo): listening to the sound image localization. Pay attention to whether the instrumental music or vocals are from the sound field of the space. The prerequisite is that the speakers must be correctly placed in the room. You can find some mono recordings for audition, and you can also focus on understanding the other performance of the speakers. Speakers with sound image positioning will "disappear" in the sound field, so that the listener does not feel that the beautiful and melodious music is coming from the pair of speakers in the front. Somewhere in the middle, the song is being introduced.
Scattering characteristics: to listen to different indoor locations. You can sit and stand and listen to check the sound scattering in the vertical plane. At this time, the treble heard will inevitably change greatly. The "emperor position" of some speakers is limited to a very narrow range, while some speakers can obtain good sound image positioning in a relatively wide range.
Each speaker will make some trade-offs in the sound quality and performance of the playback, so you should choose those parameters that you want but are not necessary.
3. Acoustic dyeing Some speakers have the defects of "acoustic dyeing" or sound reproduction, and they will also be imposed on the reproduced music. Such as harsh sounds, metallic high-pitched sounds, rough or uneven mid-range sounds due to poor cabinet design. If you can hear this kind of sound no matter what kind of recording is being played, then you can be sure that the speaker has added its inherent sound to the top of the replayed music. In general, it is always more tolerable to omit some sounds during playback than to add some sounds to the music that were not originally available. Some speakers intentionally add some noise, such as adding more bass components and making the treble brighter. Although it sounds good, such speakers seem to be good. Not worth buying.
Fourth, if the sound environment of the speaker is to listen to the speaker in an improperly placed audio store, it is unlikely to hear the full performance of the speaker. Because the placement of the speaker in the room is very important, even if the speaker is placed forward or backward slightly Moving a few centimeters will also cause a big change in the speaker's low-frequency response. When you place the speakers in a room that can enhance or weaken the bass, the tone balance will change, or you will hear rich bass or little bass. Moreover, when the speakers are not properly positioned, the original sound field for sound image localization cannot be heard. It is not regrettable that some audio shops have small storefronts, so they have to put the speakers side by side on the wall, so that they cannot give full play to the performance of the speakers. Moreover, even if the speakers are placed correctly in the store, there are still some differences from the listening environment at home. Therefore, you should find a proper placement for the speakers at home, so that the speakers can fully exert their power and show their skills. If you have negotiated in advance, you can move the speaker home to listen and try it before you buy it. If it is suitable, you can leave it. If it is not suitable, you can return it or try another pair. It is best.
5. Listen to familiar music. Because the sound quality of CD recordings is very different, there are many times. Therefore, when you go to the audio store to audition and buy speakers, it is best to bring a few CD records that you usually listen to. . In this way, you can hear what is originally on the CD recording and which is unique to the speaker during playback. Because different recordings have different levels, some are strong and some are weak, so many different types of recordings must be used to try and listen more so as to be able to compare the difference between instrumental and human voices and real sounds.
Sixth, pay attention to coordination and matching speakers must also have a coordination and matching relationship with the listening room, audio equipment and listening hobby. If the room is small, it is not appropriate to use a large floor-standing speaker. Because it will make the room too loud and the bass will not be released. Conversely, if it is a room with a large area, then using a pair of small speakers will feel inadequate to make sound.
The power amplifier driving the speaker should be "full of power". The sensitivity of the speaker expressed in dB is an indicator in this regard. The higher the sensitivity, the louder the sound of the speaker when given a given input power. However, sensitivity also represents only one aspect. The output power of the power amplifier, the size of the room, and how much volume I usually use to listen to music are also important factors. Generally speaking, when listening to music, the average output of the amplifier can be 10W, and for most home theaters, the amplifier can have 40W to 100W per channel (not including the subwoofer channel). Power is enough.
As for the matching of the speakers with other audio equipment, there is also a "door to door" requirement. If the original audio equipment is relatively high-grade, such as Hi? Fi audio equipment with a value of tens of thousands or tens of thousands, it is necessary and necessary to spend thousands of dollars or even 10,000 to 20,000 to buy Hi? Fi speakers . If the original audio equipment is only general equipment, then equipped with high-end speakers can only be blind lighting-in vain.
VII. Should be heavy but not heavy First of all, let's talk about sound quality. Everyone knows that bass is hard to find, so it should be more heavy and not heavy. It is better to be less. Too much distorted bass sounds very enjoyable to people who don't know how to do it, but experts are disdainful, because listening to it will make you tired and prone to fatigue. Therefore, you cannot buy such a speaker.
Let's talk about specific speakers. It should be borne in mind that speakers are better if they are not more expensive, or even better if they are larger. There are often small speakers that are carefully designed and manufactured. Due to the high-quality speaker units and components built in, the performance is more than that of some speakers Behemoth speakers with low-end units are better. Since the small speaker is similar to "point sound source", the sound image positioning is more accurate, and it is more suitable for use in a small or small listening room.
Besides the speaker unit, in addition to the most common electrodynamic speakers, there are some other types of speakers, which have their own characteristics, such as high-end flat magnetic speakers, electrostatic speakers, band speakers and hybrid design speakers.
8. Rather than rush, I would rather spend more time and usually say that one cannot eat fat in one bite. It is even less anxious to choose speakers. It is almost impossible to judge the quality of a pair of speakers within 3 to 5 minutes. It takes a lot of time, using a wide range of music to listen to as many speakers as possible. It not only shows a lot of knowledge, but also increases the level of listening and evaluation, which is great for choosing a good speaker. It ’s not a bad idea to take a lady or invite a friend to listen to it, but you ca n’t just listen to others without your own opinions.
Nine, comparing psychoacoustics at the same volume shows that when people listen to the speakers, most of them will mistakenly think that the louder speakers are good speakers. Therefore, the test specifies that the comparison should be made at the same sound level. When you try to listen in an audio store, you should compare as much as possible with the same sound level. If necessary, you can even buy a sound pressure level meter for testing. This type of watch is a useful tool that will come in handy when debugging a complete set of speakers for home theaters in the future.
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