6. Passive, not active
For low price, active audio is undoubtedly advantageous. The first is that the cost can be lower. The active box with integrated power amplifier can optimize the cost, and the active profit can be made low and the money can be made after a large amount. What's more important is that there are excellent active speakers like sound technology MC12,13,14, but at a low price, people can enjoy music very comfortably; easy to use, such as sound technology MC series, plug in the computer to output Sound, do not even install the driver; it does not take up space and so on.
However, active power is not the only advantage. Once the budget increases, the choice of active power will not only decrease, but the cost performance will also become poor. The disadvantages of active are also very obvious:
First, volume is a matter. Active power amplifiers can only be placed in the speakers, and the impact is small when the power is small. Once the power is increased, the volume occupied by the amplifiers will increase significantly; if the speaker content is unchanged, then the cost will be much more independent than the amplifiers (after all, That thick board). Therefore, most of the middle-end active power sources are now Class D amplifiers. But unfortunately, the sacrifices on high-efficiency Class D sounds are still obvious, and their thrust is far less than that of AB of the same power, let alone Class A;
Secondly, heat dissipation is a thing. Large heat sinks are the hallmark of high-power amplifiers, and class-A amplifiers with good sounds require huge heat sinks; it is no problem to install active speaker amplifiers when they are small, and light scattering is a big thing when the amplifier is amplified, and the power amplifier in addition to power modules Cooling is required, as is elsewhere (such as a transformer). And the internal cooling conditions of the speaker are very poor, and a lot of sound-absorbing cotton is also needed; this is really a thing!
Third, the problem of interference: the speaker is magnetic, which is itself a source of interference (don't believe what happens when you put your mobile phone or display next to the speaker). The electromagnetic wave emitted by the coil when it moves will not be small; and this pair of amplifiers I am afraid that the circuit interference is difficult to eliminate (especially the weak current part);
Fourth, the vibration problem: just put your hands on the music speakers and try it out. When the power amplifier is placed separately, the problem of anti-vibration must be considered. Vibration is a big thing in the speaker. It doesn't matter when the requirement is low, and it basically dies.
Fifth, the surgery industry has a special problem: only very few manufacturers can be good in many fields, and even then they have their own best. And if a manufacturer's speakers are also very good, and the power amplifier is also very good, then the price is also very good! If you want such cattle equipment, you must first get rid of it. However, we are not stingy.
Overall, mid-to-high-end actives are always representative of compromise and low cost performance. If you want to be cost-effective or uncompromising, it is still passive. Of course, one of the disadvantages of passive is the problem of matching. Finding the ideal match is a very labor-intensive task. You need to find it yourself, listen to it, and finally choose. For those who like toss, this is certainly a pleasure. However, it is a big problem for people who don't like tossing. The author therefore plans to launch two pairs of speakers, and at the same time find a third-party manufacturer to match the appropriate amplifier, with good recommendations. Solve these two problems.
Seven, want the ear to receive the goods, do not soften
Lao Shao generally has a mantra “ears receive goods”, the meaning is simple: do it by yourself. There are many people who blindly block earphones or related products (buy them without listening), because of their small size and low price (compared to audio), it is also easy to sell second-hand things or lose a lot. But the audio is not the same, a lot of loss of second-hand, and second-hand is relatively easy (expensive equipment, for cheap active, can be ignored). Therefore, you have to listen to it. After all, things that cost more than tens of millions of yuan (some are even more expensive) and you buy something that is not what you really want sometimes can be.
The best way is to find a fan who has his own favorite audio. The effect heard at the fan's home is the most guaranteed, and the environment is similar. Make a copy if it's appropriate and avoid a lot of detours. Travel expenses are usually not an issue. If you buy them online and want to smash them, the loss is much more than the travel expenses.
When going to the audio store, the biggest thing is the salesperson's personal sales. Don't listen to this kind of wind. Many things that sales are best at are stepping on others and then raising yourself. It's best to interrupt these words directly. Don't trust your ears, most of those sales don't understand you. Even if it's a rookie, your ears are the same as others (except for the deaf or old man). A good sound will make you comfortable and your adrenaline will rise.
On the other hand, third-party review articles don't really believe it. Although third parties have very rich listening experience, their listening level is also very high. But very few objective third parties exist, or they have py with the manufacturer (not necessarily charged, this must be understood!). However, the unreliable situation of the second party is no better than the third party. On the one hand, the level is really a matter; on the other hand, many people simply do not allow others to say bad things about their equipment. However, many people believe that the first party's madness is super flat, which is really drunk.
Eight, low-key goods, not blowing goods
One of the most commonly heard words in reality is: one cent for one cent. But for audio headphones, I have to say: This is a ridiculous P sentence! Of course, another enthusiast often said: one cent for one cent, two cents for one cent, and three cents for one cent. This sentence is a bit more general, but it is still problematic in most cases.
The chaos in the domestic audio headset market far exceeds what many people want. All kinds of goods appear endlessly, all kinds of goods, furniture flicker on a certain treasure. The chance of this kind of goods as a novice is 100% (don't think you can make exceptions, nothing).
So how to identify, are there any selection techniques? Yes, look at the introduction, the more bullish you are, the more you claim to be “professional audio manufacturer for decades”, the more you blow your technical skills, and the self-proclaimed “tuner master”, the less necessary it is. The real good stuff is often simple and simple, and tends to be low-key, just a few words. What speakers and devices are used, what kind of music is suitable, what are the characteristics of the sound, and how does the internal work work. That's it. Really good product introductions are often like this!
The same is true of recruiting people in their own departments. They have all kinds of blows in their mouths. The worst way to recruit people is to use tricks to make small reports. People who really do things often don't blame and slander.
Nine, toss, don't just toss equipment
The stereo is not a headset. You can just plug it in and plug it in. It just sounds good. Even the earphone system needs to be paired with the machine. The sound is even more complicated, in addition to matching. Speakers and power amplifiers (especially amplifiers). What's more important is that the sound is vocal, and the sound can only reach your ears through the environment (the headphones are good, they can reach the ears directly). Therefore, the effect you end up hearing is the result of the combination of sound and environment.
So for a stereo, especially many classic speakers and amplifiers, do n’t just say No. There are too many reasons for bad sound. Cooking is not cooked on one hand; placement is the other; environment is the other. As an audio player, it is very common (normal) to have a bad voice at first. Do n’t rush to the conclusion that “domestic equipment is not good”, look for other reasons first! Try to arrange a lot, and organize the room (add furniture sofa or something), the effect is often different. Even if your room is small, it wo n’t work. It has nothing to do with equipment!
I bought the equipment, the sound is not good, it is more effective than upgrading the equipment. But unfortunately, most people can't escape the urge to always upgrade their equipment ...
Twelve, want music, not stereo
The stereo was supposed to serve music. But now the audio is used to sing K, play movies, and play a lot of users, there are indeed many audio services for this, the price is cheap and sufficient. But using these speakers to purely enjoy music, it is easy for people to spoil the taste.
In order to give people the impression of high resolution and high HIFI, many stereos are quite fighting (in fact, the same is true for headphones, hehe). The speakers should be big, and the speakers should be big. However, limited to cost, the speakers are used to spread the goods, the appearance of the speakers is beautiful but may not be strengthened at all, and the low frequencies released are lumped together. The high-frequency extension should go up, and the volume sense should go up. However, the tweeter is limited to cost, and suppleness is not a consideration. In addition, the high frequency is large, which is called a bright. This type of box is not limited to active, and a bunch of cheap and "hifi" boxes on the Internet are roughly the same. The first time I heard this kind of box is very exciting, the low frequency is fierce, and the high frequency is bright. Unfortunately, it is an illusion. After listening to it for a while, I find that listening to music with them is really tired. Coupled with the frequency division circuit and devices are not in place, such a feeling of out of the box, many people have estimated that they have not really experienced, even including some using high-end equipment.
Good audio first, the intermediate frequency is better, then the high frequency must be smooth, and the low frequency must have texture and speed. The middle frequency sounds good and it sounds good. High frequency is supple and not tired after listening for a long time! At low frequencies, there is texture and speed, so the hearing is relaxed, comfortable and stress-free. Such a stereo may not necessarily give you a sense of how high quality it is at first, but in fact, this is the real quality! How high the treble is, how much the bass is, and how loud the sound is. This is just the sound. Niu Biaohong's quality is never high, and Wen Jing's calmness is the performance of quality. The same goes for the stereo! Really good audio is very quiet, even if the sound pressure is very high, it will not make people feel noisy.