How do you look at the earphone parameters to judge whether the headphones are good or bad?

Everyone always likes to compare the earphone parameters of each brand before buying headphones. Is the earphone parameters useful for selecting headphones? Regarding the issues that everyone cares about, I have compiled some information today for a simple reference.
How do you look at the earphone parameters to judge whether the headphones are good or bad? When purchasing headphones, we will pay attention to the three main parameters of the headphones, impedance, sensitivity and frequency response range. According to these three parameters, we can't think that this headset is good or bad. The parameters are just for us. A basic understanding, like its appearance, is a condition we can intuitively feel and provide a good reference for our choices.

impedance:
It consists of two parts, resistance and reactance, in ohms (Ω). Generally, the impedance of portable headphones and earplugs will not exceed 50Ω, because the devices that drive such headphones are mainly portable players and mobile phones. The front end has limited power and the impedance cannot be too high, while the portable front-end power supply is mainly DC, decoding and The amplifier circuit will not be complicated, so it does not require too much impedance to reduce the distortion of the entire system.
And why do the earphone impedance of most large-size diaphragms do so high? The reason is that due to the limitations of volume and power supply, the front end of the portable information and the completion of the tuning are not used in such a large area of ​​the diaphragm. Even if the low-impedance version of the HD800 is made, the front end does not push. The effect of the desktop system is very wasteful. The desktop system parses the amount of information, and there are a large number of filter rectifier circuits inside the amp, which also causes jitter and distortion, but high-impedance headphones can reduce these effects to a small range, which is why high-end big ears have to The impedance is very high. There are also some earplugs such as Senhai IE8 impedance is 16 ohms, sensitivity is 125dB, so the requirements for the front end is not very large, commonly known as easy to push, there are some big ears can achieve 600 ohms. Of course, it is also very popular. The high-impedance headphone system has a high signal-to-noise ratio, which can largely avoid the negative influence of the midpoint DC offset point of the amplifier. For high-impedance headphones, the load is relatively light, making the amplifier work better in the lower distortion state, which is more beneficial to the sound quality. Therefore, for fans who are pursuing sound quality, regardless of portability and price, high-resistance big ears are a good choice.

When the earphone is purchased, the sensitivity of the high impedance is high, the power to be pushed is small, and the audio reproduction degree is high, but the corresponding required voltage is higher. Because only under a strong and stable voltage, the headphones can restore the sound quality better, the sound can be more powerful and powerful.
Sensitivity:
It is the sound that the earphone can emit under unit power. The higher the impedance, the smaller the power that needs to be pushed. The higher the sensitivity, the louder the earphone is at the same voltage. The sensitivity of the earphones usually mentioned is actually the sensitivity level of the earphone. When it is applied to the electric power of 1 mW on the earphone, the sound pressure level generated by the earphone coupled to the artificial ear (dummy head), the power of 1 mW is the frequency. The standard impedance of the headphones at 1000 Hz is calculated based on the basis. High sensitivity means that the power required to reach a certain sound pressure level is small. Now the sensitivity of dynamic coil headphones is generally above 90dB/mW. If it is for the Walkman, the sensitivity is preferably around 100dB/mW or higher. .

Frequency Range:
The range of frequency response that the human ear can accept is about 20Hz to 20KHz. Currently, the earphones on the market can basically exceed the listening range of the human ear, which adds a lot of detail factors, so that when listening to music, the low frequency dive comparison Foot, the high frequency is more transparent and ethereal, but one thing to note is that (the frequency response range and the frequency response curve are two different things, don't confuse).

to sum up:
These three parameters are a few points that we pay more attention to when buying headphones, but this is like a string of numbers, it can't represent anything, and it can't explain how good or bad this earphone is (the sound is good or not is aesthetic). Therefore, if you want to finally choose a headset, you have to talk to your ear, or the song you like to listen to. This is the most basic and most common way to buy.

How do you look at the earphone parameters to judge whether the headphones are good or bad? Of course, in addition to the criteria for judging, the other thing that everyone cares about is its price. Although the price can't explain everything, it has its own expensive reason, or it is different from other headphones.

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