"Bundle" is the "excellent number" that the player of the headset uses for himself. It is used to describe his own equipment. It is equipment, it is really not a fake, because in addition to the ordinary Walkman, players generally add an amp to the product (here is the introduction, there is no necessary relationship with the following, there is no foreshadowing and other implied significance). So what is the amp? Let's take a look at Baidu Encyclopedia's explanation of the amp.
"Amp is the headphone power amplifier, because the relatively large headphone impedance is very high, the small walkman can not bring up, can not push, it must be amp, active, connected between the audio source and the headset." This is an explanation of Baidu Encyclopedia. Although it is not enough to keep pace with the times, it also explains the basic problem, that is, the headphones that can't be driven by the Walkman need to use the headphone power amplifier.
Amp? Need it? No need?
However, the earphones do not really need the amp, and the standard of how to promote the headset is controversial in the industry. Recently, we collected some network information and discussed with you whether the headset needs an amp? What kind of headphones need an amp? How to rationally choose the amp? These three questions.
The role of the amp:
First of all, it is important to make clear that the role of the amp is not to "improve the sound quality," but to allow the headset to perform its true sound level with sufficient drive.
Headphone power amplifier, as its name suggests, is a device that powers the signal, and the classification of the working principle of the amplifier can be divided into two types: voltage amplification and current amplification. In layman's terms, the first impression of the headphone amplifier is that the sound is louder, but what is the volume enough?
Does the headset need an amp? Also speaking, the role of the amp and the role of the ordinary amp are power amplification from the point of view of electricity, indicating that the output energy is large enough, for a certain impedance load, the voltage peak-to-peak is enough Big. For the sound quality of the output, the volume has almost no meaning (but if the volume is not enough, the sound quality is hard to say is satisfactory, of course, it is not enough to have to look at the individual). Because any analog amplifier circuit has its linear working range, after this interval, the circuit still has amplification, but it becomes a nonlinear amplification. Therefore, simply the volume is large enough, and it does not mean that the output quality is optimal at this time.
The ideal amplifier should be “a wire with gain†(a purely theoretical discussion). The signal passes through this wire with only a change in amplitude and the shape does not change. But with the current state of the art, even the most advanced amplifiers can't do this completely.
2. What kind of headphones need an amp?
If you can understand the previous section, I believe you already know the role of the amp and the characteristics of the current amp. So what exactly does your headset need without an amp? Regarding this issue, although there is controversy in the fever industry, the reason why this issue is controversial is caused by the difference in perspectives of all parties, and in the final analysis is to get better sound quality. In fact, we think that this is not a simple or non-zero one-choice question, or should we use the dichotomy of dialectical materialism to discuss the problem.
In fact, the requirements of different earphones for amps are different. For low-end headphones, most of them do not need amps, because the designer will consider the use of the product when designing, what equipment is the front end, what is it? The output characteristics of the sample will generally be known.
Therefore, these products usually get a good push effect directly with the Walkman and the sound card (and do not rule out the situation where you will find it better to listen to the amp), such as: PX200, PX100, DT231, KOSS35/PP /SP, SR60/80, K240S K66 AD7/AD5, etc. These headphones have limited quality. Although they are equipped with a certain machine and amp, there is a certain improvement, but we think it is of little significance.
Most of the headsets that require "amps" are mid- to high-end products, such as K601/K240M/240DF/K1000/HD600/HD580/DT831/DT931. Take the HD600 as an example. This is a famous earphone with high requirements on the amp. The high-frequency is exquisite and extends well. The problem of the front-end audio source and the amp or even the CD disc will be undoubtedly exposed. At the same time, the low frequency has a slow fat. Disadvantages must be controlled by the amp to make the low-frequency layering and elasticity play out, and it is not a simple matter for the amp to do both.
The sound card and the Walkman and the headphone output of the CD player and amplifier are actually simple amps. The first two are not limited by the sound source itself (the sound card refers to the civilian sound card), and the headphone output of the CD player It is also an attached function, and even a product of 10,000 yuan may not be able to fully push the HD600. This does not require any golden ears, as long as there is a live comparison can be heard.
How to treat the audience's sense of hearing:
People's sensitivity to sound is different, and naturally the requirements for equipment are different. We cannot promote it with the standard of a small number of people who are not sensitive to hearing. We shouldn't be whispering about the feelings of the novice user or the player, but we can't measure the HiFi equipment we are exposed to based on their point of view. In fact, the actual listening experience of many enthusiasts has already told us the importance of our ears in the whole system, which does not require the legendary "golden ears."
Still, you don't need an amp to watch the system, watch headphones, use a desktop CD+ amp, even if you listen to the MX500, you can hear a significant improvement over the direct use of the onboard sound card; but we never recommend netizens to Collocation, because the system configuration is not reasonable. Similarly, if you have high-end headphones and no amps, it is a waste of headphones resources, and there is no effective play. This system is also unreasonable.
3. How to rationally choose the amp system?
From the perspective of the entire system configuration, the problem can be rationally selected. There are many common places in the earphone system. The system must consider the problem from the perspective of the whole system, and grasp the weakest link to get the maximum improvement with the minimum investment. The source of the sounds used by many netizens is not high. Under such a premise, the role of the amp will be significantly reduced. The so-called clever woman is difficult to use, and the gap between the civilian sound card and the Walkman and the entry-level desktop CD is also very large. The overall effect of the sound source is not up to the next level.
Any circuit can only achieve its ideal working condition under ideal load conditions. Because any amplifier system is not designed for any load, it generally has an ideal load. Generally speaking, the load is directly linked to the working point of the system. The change of the load will cause the offset of the working point. If the operating point of the system is offset from the linear area or at a very edge position, then when the signal is amplified. , there will be distortion.
Picking the amp from the impedance of the earphone is a feasible idea. A well-designed amplifier system has a wide linear range and can drive many loads with different impedances. However, from the design point of view, too much consideration of load changes is bound to be introduced. A series of peripheral devices that cause amplification of the electrothermal noise. Therefore, the load range cannot be unlimited without limitation. Generally, the amplification system can achieve the best design index only under the ideal load. So even if it's a good system, I don't think it's a good idea to hang a mismatched load. In order to achieve the desired effect, it is best to consider the impedance matching problem before using it.
This also explains the amp, the walkman or the amplifier, not necessarily on the list. If the impedances don't match, then distortion will appear, and adding an amplifier may not be good. If the impedances match, the effect of distortion can be reduced to a certain extent, resulting in a pure playback effect.
Essentially, if the problem of sound processing and power matching and amplification is neglected, the system of the Walkman/Attendance + Amp can be approximated as an impedance transformation matching system. You can get better results by selecting the amplification system according to your own headphone load characteristics.
In addition, it is impossible for the amp to be 100% distortion-free and sound-stained. It is only as close as possible to the target, and the closer it is to the higher the cost. The natural color of the headphones is not completely flat and without distortion, which has different styles of headphones, which instead meets people's different preferences, so how to make the headphones fully play out under the premise of pushing the sound is An important feature of the amp.
postscript:
For a lot of first-time fever, it is only the beginning of a fever for the earphones that you want to know. In many cases, it is the most troublesome thing to wear with the amp. As we mentioned in a comment we collected, the front-end source and headphones are the limits of the system's highest sound quality, while the amp is the average of the overall system level. This statement contains multiple layers of meaning. For example, the amp does not make the whole system exceed the sound quality of the system itself. Its real role is to play the "potential" of headphones and audio sources.
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