How much do you know about audio power filters? Do you know which brands of audio power filters are available? Do you know why you need to use audio power filters? This article will discuss the relevant knowledge about audio power filter for you one by one in the future.
What is audio power filterIt is generally believed that there are various kinds of interferences such as clutter and surge in the mains connected to the home audio system, which will cause the sound quality of the audio system to be affected (such as low noise, etc.), so many fans specially configure the power supply for the audio system power supply line side. filter. The power filter is divided into active and passive. Passive filtering is very simple, and the cost is low, but the effect is not obvious; the active is relatively more expensive, and the good active filtering effect is also good. For HI-END level, it is still recommended to equip high-quality active filters; ordinary equipment is not necessary, and the effect is not obvious. Simply equip a passive one, which gives me comfort, and can also provide Short circuit protection is also a good choice.
1 Huntkey (one of the largest domestic computer power supply manufacturing bases, a well-known brand of PC power supplies, high-tech enterprises, Shenzhen Huntkey Chiyuan Electric Co., Ltd.)
2 GreatWall GreatWall (started in 1986, high-tech enterprise, power supply industry standard drafting unit, large listed company, under China Electronics Information Industry Group, China Great Wall Computer Shenzhen Co., Ltd.)
3 Antec (an international leading brand in the field of personal computer peripherals, a well-known company in the main consumer market of global personal computer peripheral products, Beijing Jiutai Huatong Technology and Trade Co., Ltd.)
4 CoolerMaster CoolerMaster (a well-known brand in the industry, a well-known computer hardware manufacturer in Taiwan, a company with complete cooling solutions, Lianyi Electronics (Huizhou) Co., Ltd.)
5 Delta (switching power supply products in the world's leading brand, large-scale video display and industrial automation solution provider, Delta Electronics Industry Co., Ltd.)
6 Seasonic Haiyun (founded in Taiwan in 1975, a professional enterprise dedicated to power R&D and production, an industry leader, a well-known brand, Haiyun Electronics Industry Co., Ltd.)
Why use audio power filterAudio technology is also called electroacoustic technology. Electricity is the mother of sound. The stable, clean, and undisturbed power supply can have an extremely obvious impact on sound. In the past life experience, we know that where the voltage is not stable enough, we need to prepare a voltage stabilizer to prevent the sudden high or low voltage in the power grid from damaging electrical appliances. Its working principle is actually a reduction. The function of peak flat pressure can ensure the safe use of electrical equipment including audio. So is everything going to be all right with this regulator? I'm afraid not.
Since our domestic electricity and industrial electricity cannot be completely isolated, the grid will be subject to complex electromagnetic interference when entering the home, and there will also be more and more digital radio equipment such as mobile phones, WIFI and other clutter interference. For example, if a chainsaw is turned on nearby and someone is using a hair dryer, this serious electromagnetic interference will immediately cause phase distortion of the power supply waveform, image distortion of the TV, color distortion, and the sound of the audio equipment is hard, not resistant to hearing, and has obvious noise. The reasons are closely related to the unclean power supply. The use of digital equipment can also bring noise interference. For example, if someone is using a mobile phone to make a call, a digital camera can also be a source of interference. To solve these problems, first of all is to filter, remove the ultra-high frequency parts that may be harmful to the audio equipment, only this is not enough, it is a processing method for more than ten years. Because pure filtering will destroy the dynamic effect of the sound and affect the richness of the sound. How to make a better power filter at present?
Qianlongsheng’s F1000 power filter uses customized special filter components to absorb electromagnetic and digital interference UHF. At the same time, it uses physical methods to fill in the crystal lattice lost in power transmission, phase correction, that is, filtering is considered. At the same time, special treatment is made for some characteristics of audiophiles. By analogy, the power supply is like a highway. On this highway, the power filter not only removes the roadblocks, but also repairs the damaged parts of the road surface. The purpose is to play the role of smoother and safer highways. The hard work of audiophiles on the power supply can be rewarded in beautiful sound.
Many high-priced devices with fever in the world are also willing to spend a lot of money on the power supply of the device, which is the same as our emphasis on using power filters. For example, looking at the tens of thousands of foreign artifacts (power amplifier/DAC/audio source), they all put the design focus on the power supply, and the wiring, filtering, and bypass of the internal power supply are very elegant. . Nowadays, mills are popular. In fact, most mills are mainly upgrading capacitors, and most of the modified capacitors are filter/bypass circuits of the power supply. The ultimate goal is to improve the power supply. .
The influence of power supply on audio power filterUnder normal circumstances, common audio players seldom include power supply in the overall plan of the audio system.
In fact, the quality of the power supply has a great impact on the performance of the audio system. Especially in an environment where various modern high-frequency communication devices are everywhere, the power supply in the audio system is polluted everywhere, and some have a serious impact on the sound performance of the audio.
So, in order to improve the purity of the power supply, how should we prevent and improve it?
First, install a power filter.
The most affected audio system is "contact conduction" electromagnetic interference. For example, the motor devices of refrigerators and washing machines, lighting tubes, and even the high-frequency noise of computers will have some adverse effects on the sensitive circuits of the audio system.
Although these high-frequency noises are far beyond the auditory range, they do have a "modulation" effect on the audio signal. People's keen ears can sometimes clearly feel the deterioration of the sound quality.
In view of the impact of these high-frequency noises, the most direct solution is to install a power supply filter. In addition to the power supply filters in the market, there are also very effective "power processors".
Usually these products are expensive, but the effect is significant, can effectively remove the power impurities, to maximize the sound quality effect the equipment should have.
In addition, some well-designed power supply filters perform well, with obvious effects in terms of power capacity and dynamics.
Second, pay attention to the "landing" effect of audio equipment.
A good "landing" can effectively suppress the influence of electromagnetic interference on sound quality.
"Landing" is actually part of the power supply, but "landing" usually involves the default power system configuration during the construction of the building.
Buildings rarely do special treatment for the "landing" of audio equipment. In daily life, the "landing" of the audio system is not ideal. Therefore, if conditions permit, professionals can be invited to erect the ground wire of the building.
Sometimes, connecting a ground wire between the signal source and the amplifier case can significantly help the sound quality. This is because the zero-potential integration between the equipment also helps to suppress the influence of electromagnetic waves on the sound quality performance.
Of course, when it comes to the field of radio frequency interference, a seemingly inconspicuous ground wire needs to be carefully selected, and even the difference in the connection direction will make the sound quality different.
The third is the so-called power phase problem.
Generally, audio equipment power cords are IEC standard specifications. Then, in the sound design plan, we must consider whether the indoor socket and internal wiring are also constructed in accordance with the IEC standard. Obviously, incorrect configuration does not affect the use of electrical appliances, but it will affect the sound quality of the audio system.
In addition, for audio equipment using two-pin power plugs, plugging in different directions will actually have different sound performance (the two power lines are divided into live and neutral wires), which is different from the power sockets that are not in accordance with the standard IEC equipment. The same is affected.
Audiophiles can test the sound changes themselves to make judgments.
The pure power supply allows the audio equipment to play its highest potential, restoring the original sound quality of the audio. Good "landing" and integration of the consistency of power phase and zero potential between audio equipment can give play to the best power rejection performance of the entire audio system, block all noise that affects the sound quality, and restore the original sound.
In general, for a set of good audio equipment, the power supply and the ground wire itself are an inseparable whole, and a good "landing" helps to improve the purity of the power supply. Therefore, when the power supply is seriously polluted, power processing becomes the focus of attention of audiophiles.
ConclusionThat's it for the introduction of audio power filters. There are many more in-depth levels of audio power filters, so I won't repeat them in this article.
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