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What is a DSP power amplifier?

What is a DSP power amplifier? DSP power amplifier refers to a power amplifier that uses DSP chips to optimize and manage audio parameters through digital signal processing algorithms. It is a technology that converts a two-channel stereo signal into a multi-channel surround sound signal. While the DSP power amplifier has other power amplifier functions, it can attenuate the overlapping frequencies caused by the environment, add the frequencies attenuated by the environment, and can adjust the defects that cannot be adjusted physically. What is DSP in DSP power amplifier? DSP is digital signal processing, a device that processes a large amount of information with digital signals. It is mainly a tool for tuners to tune. It was first used in theaters, theaters and other places with multiple speakers to solve the sound field problem. What is the role of DSP? 1.DSP, also known as digital signal processing, its biggest role is to improve the power of the speaker, when the audio power is relatively low, increase the DSP can improve the power, so that the sound has a delay function, the audio has a better stereo effect, especially in the audio speakers below 50 watts, can avoid the embarrassment of the bass is too small.2. In addition, it also highlights the sound output of certain frequency bands, because there are 10 bands in the audio, 31 bands, etc., different audio segments may be slightly different, and the diversification of music, will lead to listening to some music, the midrange or bass is not prominent enough, DSP can increase these bands to make the sound prominent.3. Finally it can improve the sound, simply put is to make the sound quality better, it is through the transformation, modulation, demodulation and so on various algorithms, after processing the signal, so that the sound is clear, the sound of various frequency bands more comfortable to listen to. 2021 Sinbosen newest High quality 4 channel sound system 1300w DSP FP10000q module power amplifier DSP10000q DSP10000Q is 4 in 4 out digital processing module boards, aiming at professional amplifier. 2100wx4ch,4ohms/1350wx4ch,8ohms. Dsp power amplifier 4 input 4 output LA8 Professional Multifunctional Audio Amp New professional dsp power amplifier LA8 in 2022, DSP software control amplifier! D2-3500 DSP Professional Stage Digital Audio Power Amplifier Digital amp have become the trend of the entire industry and frequently appear on the large stage!D series also born for this!

How should we care for and maintain the speakers?

How should we care for and maintain the speakers? Why do we need to maintain our speakers?As a kind of durable consumer goods, the speaker is not easy to malfunction, but it is often very troublesome when it goes wrong, which brings us a lot of inconvenience. In the daily use of the sound box in the process of maintenance and maintenance, you can extend the use of the sound box time, so that their use more satisfactory. How to maintain your own speakers?1. Dust is the keyDust has always been the natural enemy of power amplifier and speakers. In the process of years of use, the dust in the speakers will cause a subtle influence on the sound quality. Clean the speakers at least once a week to keep them free of dust. Place the speaker in a place where there is not much dust to prolong the life of the speaker.2. Keep away moistureHumidity is the invisible killer of speakers. The humidity of the sound box will cause the physical deterioration of the horn diaphragm in the process of vibration, which accelerates the aging of the horn diaphragm and directly leads to the decline of sound quality. In addition, moisture will aggravate the aging of the horn's soft rubber ring edge, and let some metal parts inside the speaker corroded and rusted, causing unexpected failures.The speaker should be placed in a relatively dry environment, if the use of the environment is humid, in the absence of the use of the speaker, you can use a bag to cover the speaker to moisture-proof.3. The temperature between the sound box and the environment should be appropriateThe various components in the sound box have certain requirements for temperature, such as wood, paper basin basin, treble silk film, overhang, bracket, adhesive and voice coil. If the temperature is too high or too low, it will cause the unstable operation of the sound box parts. These small parts will not have problems in general. But if some families in the north have furnaces, heating and other equipment, they should keep the speakers away. 4. Switch the sound box and adjust the volume to an appropriate positionPassive speakers are basically equipped with external power amplifier, power amplifier is the most afraid of instantaneous current impact, if the instant current is very large, easy to cause the power amplifier burned. Before starting the audio source device, adjust the sound of the speaker box to the minimum. After the audio source device starts, turn up the volume. On the contrary, when turning off the sound source, the volume of the sound box should be adjusted to the minimum and then turn off the sound source. In this way, the external power amplifier of the sound box can be well protected. The simple maintenance and maintenance of the sound box are mostly within the power of the matter, usually pay more attention to the maintenance and maintenance details, will greatly enhance the service life of the sound box. V932 Active 12 inch line array speaker lightweight V932 Active 12 inch 2 way Line Array Speaker , With Power Amplifier Board. KA208 Line array dual 8 inch passive speaker pa system KA208 Line array dual 8 inch passive speaker pa system Sinbosen High-grade pa speaker KA-3 dual 12 inch 2 ways line array speakers outdoor professional event KA-3 made of waterproof, temperature-resistant, high-quality sound materials, and some humanized details are added! Sinbosen High-grade pa speaker KA-1 dual 15 inch 3 ways line array speakers outdoor professional event KA-1 made of waterproof, temperature-resistant, high-quality sound materials, and some humanized details are added!

What are the general combinations of line array speakers?

There are generally five combinations of line array speakers, as shown in the figure. Figure 1, two full-frequency speakers are erected on top of the subwoofer. This sound reinforcement method is suitable for a flat playground without a stage. Because the speakers are higher than the head of a standing person, the sound can increase the transmission distance. Figure 1 Figure 2 Two full-range speakers are erected side by side on top of the subwoofer. This sound reinforcement method can widen the radiation surface of the sound. It is suitable for occasions where there is a stage, because the high and low speakers of the speaker are higher than the top of the listener's head, so the sound effect is better than Figure 1. Figure 3 Two full-range speakers are stacked sideways on top of the subwoofer. This sound reinforcement method is used indoors in conference halls. Suitable for evening performances and conferences with a stage. The advantage is that the ratio of each frequency band of the sound is balanced and the sound is stable, which is the way of use in many performance occasions. Figure 4 This combination of speakers is not desirable, the subwoofer placed on the full-range speaker will produce sound interference, the sound effect of the subwoofer will be greatly reduced, top-heavy, and the sound system is not safe during operation. Figure 5 Figure 5 Shows a method of hanging. In use, an iron frame should be built and raised to a certain height. The method generally used for large-scale performances and drills. More line array speakers can be added to form a larger sound reinforcement system. When such a combination is used, the hanging and other components must be carefully checked to ensure safety. V932 Active 12 inch line array speaker lightweight V932 Active 12 inch 2 way Line Array Speaker , With Power Amplifier Board. Sinbosen dual 10 inch 18 inch bass big speaker sound system line array KA210+ KA218 New line array system . double 8 inch + 18 inch subwoofer . Support perfect sound . suitable for slow rock middle/large show Sinbosen KA208+ KA18 18 inch subwoofer speaker line array system KA208+ KA18 New line array system . double 8 Sinbosen High-grade pa speaker K2 dual 12 inch 3 ways line array speakers outdoor professional event K2 made of waterproof, temperature-resistant, high-quality sound materials, and some humanized details are added!

What is a heat sink?

What is a heat sink? The heat sink is a device for dissipating heat for the heat-prone electronic components in the electrical appliance. Mostly made of aluminum alloy, brass or bronze into plate, flake, multi-flake, etc.For example, the CPU central processing unit in a computer needs to use a fairly large heat sink. The power tube, the line tube in the TV, and the power amplifier tube in the power amplifier should also use the heat sink.  The working principle of the heat sink? The principle of heat sink heat dissipation is to increase the surface area to speed up heat dissipation. The material used as the heat sink is a metal with a small specific heat, which absorbs heat very quickly and dissipates heat relatively quickly, so that the effect of rapid heat dissipation is achieved through heat transfer. Generally, the heat sink should be coated with a layer of thermal grease on the contact surface between the electronic component and the heat sink during use, so that the heat emitted by the component can be more effectively conducted to the heat sink. It is then dissipated into the surrounding air through the heat sink.As far as the heat sink material is concerned, the thermal conductivity of each material is different, and the thermal conductivity is arranged from high to low, namely silver, copper, aluminum, and steel. However, it would be too expensive to use silver as a heat sink. Copper and aluminum are the best and most cost-effective solutions. Sinbosen's amplifiers are made of these two materials. The role of heat sink? The radiator is a device that accelerates the heat dissipation of the heating body. There are two points to measure the quality of a radiator: heat dissipation and quietness.For example, a large number of integrated circuits are used in computer components, as are ic power amplifiers. As we all know, high temperature is the enemy of integrated circuits. High temperature will not only cause the system to run erratically, shorten the service life, and may even cause some components to burn out. The heat that causes the high temperature does not come from outside the amplifier, but inside the integrated circuit. The function of the radiator is to absorb the heat, and then dissipate it to the inside or outside of the case to ensure that the temperature of the computer components is normal. Most radiators absorb heat by contacting the surface of the heating component, and then transmit the heat to a distance through various methods. For example, in the air in the chassis, and then the chassis will transfer the hot air to the outside of the chassis to complete the heat dissipation of the computer. Sinbosen FP10000Q 4 channel professional power amplifier for dual 15 inch speaker Sinbosen FP10000q power amplifier can use with 4 pcs Dual 15 inch speaker. Applied to STAGE Performance, Night Club, etc Sinbosen high power 4400w 2 channel lab FP14000 amplifier for dual 18-inch bass Sinbsoen FP14000 POWER AMP : 2 channelx4400 Watts into 4 Ohms, 2 channelx2400 Watts into 8 Ohms. Suitable for 18 Sinbosen FP20000Q 4000 watt 4 channel professional bass power amplifier dual 18 inch subwoofer One FP20000q amplifier can use with 4 pcs 18-inch subwoofer Perfect bass sound quality Light and durable, easy to carry. Sinbosen Nightclub Sound Equipment FP22000Q 4650w 4 Channels Most powerful Professional Power Amplifier for 21 Inch Subwoofer To meet the needs of clients, we are developing new products, including strengthening versions and a more powerful amplifier.

How to avoid the whistle of the microphone?

It's a painful experience to meet a whistle when you're singing. You're totally lost in the beautiful music,but then the microphone starts blaring and you lose all your excitement. It can be especially awkward for the singer if someone else is present. Screaming during meetings can also get things out of hand. The cause of the whistle ? ① The microphone is located at the front of the speaker and points to the speaker ② The speaker is too close to the microphone ③ the user put his hand over his microphone to sing ④ Serious sound reflection ⑤ Microphone gain is too high (volume is too high) ⑥ Sound system is not perfect The impact of whistle ? Once the whistle occurs, mild will cause the microphone volume can not be turned up, because after turning up the volume, the whistle will become very serious. Not only cause trouble to the user,the damage to equipment is also significant.Below whistle state, the signal is very strong, can make power amplifier appear clipping wave distortion, and produce a lot of high frequency harmonics. After these high-frequency harmonics are sent to the treble driver of the speaker box, the treble driver cannot withstand such a powerful high-frequency signal, which will cause the voice coil to burn. In addition, in the whistle state, the power amplifier will be overloaded due to the output is too large, and it is also very likely to be burned. How to avoid the whistle of microphone ? 1. Habits of microphone use①Keep the microphone away from the speaker box②Adjust the volume of the microphone appropriately. If the microphone volume is too large, the probability of ringing phenomenon will increase, to reduce the volume in time to avoid the whistle. In addition, if the handheld microphone through the speaker, also want to pay attention to control the volume, otherwise the microphone will be too close to the speaker and cause serious noise.③Rational use of speakers and microphones pointing characteristics. The microphone and the speaker have directivity, if the microphone is not in the use of the speaker sound radiation area, the sound of the speaker is not easy to reach the microphone; Similarly, if the speaker is not in the microphone's pick up area, it is difficult for the microphone to pick up the sound from the speaker. Therefore, by properly adjusting the Angle of the speaker, in the use of the microphone to make it avoid the sound playback area of the speaker, or make the sound radiation area of the speaker does not overlap with the use of the microphone, you can suppress the whistle. 2.Rely on electroacoustic equipment① frequency shifterBy changing the frequency of the sound with a frequency shifter, the whistle can be suppressed by destroying the conditions that produce the whistle. However, the device has certain limitations and is not suitable for singing and Musical Instruments. It can increase the sound signal by 5Hz, which is good for speech amplification, because speech ranges from 130 to 350Hz, and a change of 5Hz does not result in a noticeable increase in pitch. However, the lower limit frequency of vocal music and instrumental music is about 20Hz. When people listen to the tone change of 5Hz, they have a very obvious sense of its change. ②Equalizer and feedback suppressorThe reason for the whistle is that the signal of some frequencies in the system is too strong. Weakening this part of the signal can suppress the whistle. Both equalizer and feedback suppressor can effectively weaken the gain of feedback frequency points to suppress the whistle. 3.The acoustic design of the roomThe sound condition of the room is not good, for example, the acoustic resonance of the room makes certain frequencies in the sound to be strengthened, will lead to the whistle. The sound focusing caused by the concave reflection in the room causes the local volume in the sound field to be too strong. When the microphone picks up the sound in the area where the sound is focused, the noise will also be generated. Interior design, the user can through reasonable sound field layout, increase sound absorbing materials, change sound reflection effects and other physical means to avoid the whistle as far as possible. 4.Reasonable selection of sound system equipment As the saying goes, "a good horse with a good saddle", singing is the same, good sound equipment can for the singer's voice embellishments a lot.

The difference between built-in crossover and external crossover?

What is a built-in crossover? In fact, there is a crossover board inside the speaker. When the amplified audio signal is transmitted, it will transmit the high frequency and low frequency of the signal to the treble driver and bass driver of the speaker according to the frequency division point designed by the driver of the speaker. This is also a common power crossover, also called passive crossover. Common built-in frequency divider circuit  In the audio system, although the built-in crossover is the most common, it does not fully meet the needs of all our systems. When speakers don't have power crossover boards to keep the audio frequency band going, system engineers need to figure out a way to artificially divide them. The principle is to add a device with a frequency divider function before the power amplifier to divide the high frequency and low frequency signals in advance for the full-frequency signal in the weak current. After that, the signal current is amplified by the tweeter power amplifier and the bass power amplifier respectively, and is directly sent to the corresponding driver of the speaker. This frequency division method is called electronic frequency division, also called active frequency division. Common external frequency divider circuit We often have a question: Is the built-in crossover better or the external crossover better?From an objective point of view, there is no such thing as absolute good or bad. For example, for the built-in 3-way speaker, we only need to give 1 full-frequency signal to the speaker power amplifier, and the audio signal amplified by the power amplifier is sent to the speaker. Then the frequency division board inside the speaker will divide the signal to the tweeter, midrange speaker and woofer according to the set frequency division point. In this way, we only need one power amplifier to complete it. First of all, it saves a certain cost, and in terms of debugging, the original understanding and presentation of the speaker by the speaker developer and designer is used, which shows the best sound quality effect of the factory default.  Works in the built-in three-way state With the rapid development of the audio industry, there are more and more choices of speakers. Now many speakers on the market usually have two working modes: one is the built-in crossover mode FULL, and the other is the external crossover mode Bi-AMP, select the working mode of the speaker by adjusting the key. As for the advantages and disadvantages of the internal and external frequency division, the previous article has been explained. On this basis, we did an experiment: using a processor to process the two working modes of a two-way speaker, let it play the same song in the external crossover mode and the built-in crossover mode respectively. As a result, the effect of the external crossover to release music is not as good as the built-in crossover, because when we use the external electronic crossover of the speaker, we only set the crossover to play directly, and the high and low frequencies are not fully connected. After some careful elaboration, the sound became somewhat intriguing. What is the reason?When using an external electronic crossover, the engineer needs to correct and adjust the data parameters in the sound reinforcement just like the speaker development and calibration work. This is like the sound quality of the tuner and the speaker is in PK. In the absence of a professional sound engineer, we prefer to choose the crossover mode effect set by the speaker factory, that is, the built-in crossover mode, which can help us restore the original intention of the speaker designer. Of course, you are a senior audiophile, and you have a good understanding of acoustics, phase, and electronic circuits. I believe that the external crossover can bring you even greater surprises! Summarize(The difference between built-in and external crossover) 1. Place different①Built-in frequency divider: The frequency divider is installed inside the audio.②External frequency divider: also known as active frequency divider, the frequency divider is installed outside the audio, and the external frequency divider has an electronic frequency divider or a processor to process the signal.2. The characteristics are different①Built-in frequency division: When the amplified audio signal is transmitted, the internal frequency division board is responsible for passing its capacitance, inductance, etc.②External frequency division: For 3-ways audio signals of high, medium and low, there must be three power amplifiers to receive the 3-way frequency-divided signals respectively, and then transmit them to the corresponding drivers of the speakers after amplification.3. Different advantages①Built-in crossover: It does not fully meet the needs of all our systems. When speakers do not have a power crossover board to make the audio segment go its own way, the system engineer needs to find a way to artificially divide the frequency.②External frequency division: The signals of each frequency band can be better utilized, and the selection of frequency bands is more flexible. The high, middle and low frequency frequency bands are more clearly focused on expressing their own frequency domain content. V932 Active 12 inch line array speaker lightweight V932 Active 12 inch 2 way Line Array Speaker , With Power Amplifier Board. KARA Line array dual 8 inch passive speaker pa system KARA Line array dual 8 inch passive speaker pa system Sinbosen High-grade pa speaker K1 dual 15 inch 3 ways line array speakers outdoor professional event K1 made of waterproof, temperature-resistant, high-quality sound materials, and some humanized details are added! Sinbosen High-grade pa speaker K2 dual 12 inch 3 ways line array speakers outdoor professional event K2 made of waterproof, temperature-resistant, high-quality sound materials, and some humanized details are added!

How the speaker presents high and low bass?

What is the use of a crossover? If you want them to work together harmoniously, it is not just a simple docking. The function of the crossover is to complete the combination of the frequency response between the speakers to achieve better results. The frequency divider processes the music signal output by the power amplifier through the filter element in it to allow the specific frequency signal of each unit to pass. To put it simply, the original signal is divided into several frequency bands, and the frequency divider selects the frequency band most suitable for the corresponding unit to play and assigns it to it, so as to realize the cooperative work of multiple speakers.The need for the frequency divider is determined by the design of the speaker itself. The double frequency divider is divided into two sections, and the third frequency divider is divided into three sections. This is what we often call "two-way" and "three-way". Divided according to the working principle of the frequency divider, it has a variety of implementation methods, and it is divided into different types of designs, but we often see two categories of power frequency dividers and electronic frequency dividers, which is also often The concept of being able to hear. Electronic components as the core of the power divider  The power divider is designed after the power amplifier and is mainly composed of capacitors and inductance components, so it is also called an inductance-capacitance divider. Because inductors and capacitors have filtering effects, low-pass and high-pass can be achieved through inductors and capacitors, and finally the purpose of dividing the frequency is achieved. This type of frequency divider is set inside the speaker, and through the LC filter network, the audio signal output by the power amplifier is divided into high, medium and low, and then sent to each sounding unit respectively. The simplest power frequency division is capacitor frequency division, which is to realize frequency division by connecting a capacitor in series behind the tweeter. Slightly more complex can use capacitors and inductors in each path to achieve a more accurate frequency division effect. But in any case, the power crossover installation is still very simple, and both active and passive speakers can be applied. The power frequency division also has attenuation phenomenon in the frequency band after frequency division, and the slope of the attenuation curve is generally related to the number of filtering times.However, the disadvantage of the power divider is also obvious. It consumes power by itself, and there will be audio valleys and crossover distortion. In addition, the parameters of the power divider have a direct relationship with the impedance of the speaker unit itself, because the impedance of the unit is a function of frequency, which deviates greatly from the nominal value, so the error is large, which is not conducive to tuning, and may require sufficient experience. And technology can make the power frequency division achieve good results. Electromic crossovers that work with audio signals Unlike the power crossover, the electronic crossover is located before the power amplifier. After the electronic frequency divider divides the weak audio signal, it uses its own independent power amplifier to amplify the signal of each frequency band and then sends it to the unit of the speaker to achieve the frequency division effect. For example, if a two-way (two-way) speaker uses electronic crossover, the two-channel signal will be divided into four channels, so the rear-end power amplifier needs four channels to complete the output. Electronic frequency division has obvious advantages in technology. First of all, it does not have power loss like a power frequency divider. Its smaller current can be realized by a smaller power electronic active filter. Not obvious or even negligible. The interference between the speaker units of the electronic crossover will be smaller, the signal loss will be smaller, and the sound quality will be slightly better. Of course, it is more intuitive and convenient to tune. Of course, the electronic frequency divider also has shortcomings. Due to the operating principle, each electronic frequency divider needs to use an independent power amplifier. The cost is very high, and the design of the circuit structure will be more complicated. The high price of brass seems to have a cost advantage. And because the electronic crossover is generally integrated with the power amplifier system, the playability of the electronic crossover is not so high for DIY speaker players. Conclusion With the frequency divider, the multi-unit speakers can play back the treble, midrange and bass clearly and accurately. Moreover, the quality of the frequency divider just represents the manufacturer's own technical strength. Only experienced and technically strong manufacturers can produce high-quality frequency dividers. There is no doubt that the behind-the-scenes hero of the speaker is none other than the crossover. Sinbosen High-grade pa speaker K1 dual 15 inch 3 ways line array speakers outdoor professional event K1 made of waterproof, temperature-resistant, high-quality sound materials, and some humanized details are added! Sinbosen High-grade pa speaker K2 dual 12 inch 3 ways line array speakers outdoor professional event K2 made of waterproof, temperature-resistant, high-quality sound materials, and some humanized details are added! Sinbosen High-grade pa speaker K3 dual 12 inch 2 ways line array speakers outdoor professional event K3 made of waterproof, temperature-resistant, high-quality sound materials, and some humanized details are added! 3 way dual 10 inch audio line array speaker V8 is coated with polyurea paint, which is waterproof, high temperature resistant.The front is protected by hard metal grille.

What is the circuit of the crossover and how it works?

Crossovers are generally used in units with treble and bass, or speakers with midrange units. Without a crossover, a speaker with multiple units cannot play back sounds in different frequency bands. And the difference in the type and quality of the crossover also affects whether the speaker can play back better sound performance. Speaker crossover circuitThe speaker crossover is able to separate the frequency of the sound signal, distinguish the sound signal of different frequency bands, and then amplify it and send it to the speakers of the corresponding high and low frequency bands to achieve the effect of high and low sound quality. The role of the speaker crossover circuit1.    When playing music, it is difficult to cover all frequency bands with only one speaker due to the limitation of the speaker unit's own capability and structure. And if the full-band signal is directly sent to the high, medium and low frequency units without distribution, the local "excess signal" outside the frequency response range of the unit will have an adverse effect on the recovery of the signal in the normal frequency band, and may even Damage the tweeter and midrange unit. For this reason, designers must divide the audio frequency band into segments, and use different speakers for different frequency bands. This is the origin and function of the crossover.2.    The crossover is the "brain" in the speaker, which is very important to the quality of sound quality. The music signal output by the power amplifier must be processed by each filter element in the crossover, so that the signal of the specific frequency of each unit passes through. It is necessary to design the crossover of the speaker scientifically, rationally and rigorously, in order to effectively modify the different characteristics of the speaker units and optimize the combination, so that each unit can maximize its strengths and avoid weaknesses, and fully exert its own potential. The frequency response of each frequency band is smooth and the phase of the sound image is accurate, so that the music played by the high, medium and low frequencies can be clearly and in tune, and the sound quality is clear, warm, broad and natural. 3.    In the actual crossover, sometimes in order to balance the flexibility difference between the high and low frequency units, an attenuation resistor is also added. In addition, some crossover also add an impedance compensation network composed of resistors and capacitors, the purpose of which is to flatten the impedance curve of the speaker, so as to facilitate the drive of the power amplifier.How a speaker crossover works? From the working principle, the frequency divider is a filter network composed of capacitors and inductors. The treble channel only allows high-frequency signals to pass through and blocks low-frequency signals; the bass channel is just the opposite, only allowing the bass to pass through and blocking high-frequency signals; The intermediate frequencies can pass through, and both high-frequency components and low-frequency components will be blocked.

What is the difference between active speakers and passive speakers?

What are active speakers and passive speakers?    Many people are ignorant when they see the introduction of active and passive speakers when choosing speakers.Don't quite understand the fundamental difference between the two. And the scope of application of these two speakers. Passive speaker    Passive speakers means that there is no driving source inside the speakers, only the cabinet structure and speakers. There is only a simple treble and bass crossover inside. This kind of speaker is called a passive speaker, which is what we call a big box. This kind of speaker needs to be driven by an amplifier, and only the power output by the amplifier can drive the speaker.       Let's take a look at the internal structure of the passive speaker on the left.        Passive speaker composition: wooden cabinet, treble and bass unit speaker, crossover, internal sound-absorbing cotton, and speaker terminal. To drive a passive speaker, you need to use a speaker cable to connect the speaker terminal to the output terminal of the power amplifier. The volume level is controlled by the power amplifier. The choice of sound source and the adjustment of high and low frequencies are all done by the power amplifier. The speaker is only responsible for sound. When discussing speakers, there is no special note, generally speaking, they are passive speakers. That is, passive speakers can be matched with different types of power amplifiers of different brands. Able to make more flexible collocation. Active speakers     Active speakers, as the name suggests, the box contains a power drive unit. There is a driving source. That is, on the basis of passive speakers, the power supply, power amplifier circuit, tuning circuit, and even decoding circuit are all put into the speaker. Active speakers can be simply understood as an integrated body of passive speakers and power amplifiers.  On the right is the internal structure of the active speaker Comparison of passive speakers and active speakers    Passive speakers can be matched with different power amplifiers, and can be combined freely to match the music style you want. The disadvantage is that the power amplifier is large in size and takes up more space.   The active speaker has a compact structure and integrates a power amplifier circuit, so users do not need to purchase an additional power amplifier. Save the power amplifier space. The disadvantage is that the music style of active speakers is determined by the power amplifier circuit integrated by the manufacturer, and the sound style is not adjustable. Here is the sound style is not adjusting the high and low sounds, but the overall sound style of the active speaker. It is fixed according to the tuning style of the manufacturer. More suitable for users who don't like tossing.   In terms of sound quality, it is difficult to compare the sound quality of active speakers and passive speakers. The sound quality of passive speakers depends more on what kind of power amplifier you use. Most active speakers are professionally adjusted by manufacturers. The difference in sound quality between the two depends on the money you invest.    Through the figure we can see that the active speaker includes a wooden cabinet, a high and low speaker unit, internal sound-absorbing cotton, internal power supply and power amplifier board, and internal tuning circuit. Similarly, on the external interface, active speakers are quite different from passive speakers. Since the active speaker integrates the power amplifier circuit, the external input is usually 3.5mm audio port, red and black lotus socket, coaxial or optical fiber interface. The signal received by the active speaker is a low-power and low-voltage analog signal. For example, our mobile phones can be directly connected to active speakers through a 3.5mm paired recording cable, and you can enjoy stunning sound effects. For example, the computer audio output port, or the lotus interface of the set-top box, can be directly connected to the active speaker.   The advantage of the active speaker is that it eliminates the power amplifier, which takes up more space, and the active speaker integrates the power amplifier circuit. This saves a lot of space in space. In addition to the wooden cabinet, the active speaker also has alloy cabinets and other materials, and the overall design is more compact. Because active speakers occupy the cabinet space and the cabinet space is limited, the traditional power amplifier power supply and circuits cannot be integrated, so most active speakers are now class D power amplifier circuits. There are also a few class AB active speakers that integrate transformers and radiators into the active speakers. About the sound quality and effects of Class AB and Class D amplifiers, we will give you a detailed explanation later. No introduction in this issue. Contact ViaEmail: export@sinbosen.comWhatsApp: https://api.whatsapp.com/send?phone=8613342806188FaceBook:https://www.facebook.com/Betty.SinbosenAudio/https://www.facebook.com/sinbosenamplifier/Instagram: https://www.instagram.com/sinbosen.espanol/

What is the difference between professional power amplifier and home power amplifier?

   What is the difference between professional power amplifiers and home power amplifiers? I believe many audio enthusiasts have seen the electrical schematic diagrams of professional power amplifiers and home power amplifiers. If you only look at the electrical schematics, it seems that there is no obvious difference between professional power amplifiers and home power amplifiers. From the point of view of usage, both are used to drive speakers to reproduce sound, which seems to be the same. From the perspective of performance indicators, the basic performance indicators of this power amplifier and professional power amplifiers are also similar. In fact, there are many differences between professional power amplifiers and home power amplifiers.   Professional amplifiers generally need to work for a long time and continuously at high power. Therefore, professional amplifiers require large power margins, high reliability, low output stage temperature rise, and better circuit stability. To meet such requirements, amplifiers have special considerations that are different from household amplifiers in terms of design, materials, and morality. For example, the capacity of the power circuit of a professional power amplifier is often based on the actual consumption of the amplifier, plus sufficient margin, so it is much larger than the capacity of a household power amplifier of the same nominal power. The high-power components of professional power amplifiers often choose specifications with higher maximum current and withstand voltage than the rated value. The radiator of the output stage also uses a large exposed radiator to facilitate heat dissipation and ensure a higher temperature rise during inequality time work. Low. If we look at professional power amplifiers and household power amplifiers with the same rated output power of 100W×2, we can find that the radiator of professional power amplifiers is much larger. This is because although the home power amplifier has a nominal rated output power of 100W, in actual use it often only works at a small output power (generally, the average power is about 10W). Only when the sudden peak signal of certain music is broadcast, it is possible to reach an output power of tens of watts in a short time. Therefore, the actual workload of the output stage of the home power amplifier is relatively light. Professional power amplifiers with a rated output power of 100W often reach close to "full power" in actual use. The actual working load is heavier, so the output stage generates more heat and requires a larger radiator for good performance. Heat dissipation. From the perspective of amplifier design requirements    Household amplifiers are often used in quieter home environments, and are usually used for music appreciation and movie playback. The HI-FI amplifier used in the home is used to more realistically broadcast the "original sound" of the music, requiring the level and detail of the music to be broadcast. Therefore, home power amplifiers have higher requirements for sound fidelity, and require softer, detailed, and pleasant sounds. Professional power amplifiers are often used in large-scale sound reinforcement and used to drive professional speakers. Therefore, they require strong driving ability, sufficient output power, bright and clear sound, and sufficient strength. Therefore, the sound characteristics of the two are also somewhat different. However, some very advanced professional power amplifiers also pay more attention to the fidelity of the broadcast sound. If matched with higher-level professional speakers, the sound broadcast is clearer, more detailed, and better. From the perspective of function settings    Professional power amplifiers often work with front-end equipment such as mixers, so they are mostly pure rear-end amplifiers. The setting of professional amplifier is very simple, often there are only power switch and output level adjustment potentiometer (or step attenuator) on the panel. However, due to the actual needs of professional power amplifiers, it can often work in a dual-channel state or become a mono amplifier after being "bridged". Therefore, professional power amplifiers are mostly equipped with a "bridge" switch. There are many models of household power amplifiers that are "combined" amplifiers with pre-amplifiers. This combined amplifier has more functions, often with audio source selection, monotone control, and multiple audio input interfaces. From the perspective of the working status of the amplifier    Professional power amplifiers pay more attention to the efficiency of the amplifier, so most of them are class AB amplifiers. Some household power amplifiers use Class AB amplifiers, or "high-biased Class AB" amplifiers, some use Class A amplifiers, and some also use dynamically biased "Super Class A" amplifiers. From the output power point of view, professional power amplifiers tend to have relatively large output power, and the output power of a single unit can reach more than 1000W. The rated output power of household power amplifiers is mostly below 200W.Contact ViaEmail: export@sinbosen.comWhatsApp: https://api.whatsapp.com/send?phone=8613342806188FaceBook:https://www.facebook.com/Betty.SinbosenAudio/https://www.facebook.com/sinbosenamplifier/Instagram: https://www.instagram.com/sinbosen.espanol/

What are the specific functions of the processor?

In the last FAQ, we mentioned what parts of the stage performance sound system, some of which are about the processor. The processor is responsible for processing the audio signals mixed by the mixer, and processing these audio signals according to the system and on-site conditions, so that the speakers can better reproduce these audio signals. So do you know what functions the processor has?The processor has 6 specific functions:1. Level processing2. Phase and delay processing3. Balance processing4. Signal routing processing5. Frequency divider6. Howling suppressor (some processors do not)Take a closer look at the output channel and the function of the output channel, you will find that there are gain, compression, compression, equalization, delay and so on. Level processing   Level processing is the processing of amplifying or attenuating the signal level. What are the functions in the processor, and which are the level processing categories? The functions that can make the level bigger and smaller are all!For example: gain and compression in the input channel, pressure limit in the output channel, these functions can be used to adjust the size of the input level or output level, this is level processing.Why do these level processing?If the output signal of the upper-level equipment is too large or too small, the processor must attenuate or amplify the signal again to ensure that the processor can obtain a suitable signal. In the same way, in order to ensure that the next-level equipment of the processor can obtain a signal of a suitable size, we also need to adjust the output level of the processor.Phase and delay processing   There is no need to say more about this, because sometimes the distance between the speakers and the audience is different. (Main amplifier and supplementary sound box) In order to make the sound of the two speakers reach the listener's ears at the same time, the delay function is needed at this time.Balanced processing  It is a device for raising and attenuating different frequencies and adjusting the ratio of bass, midrange, and treble.Sometimes it can be used to cut off the frequency of howling to prevent damage to speakers and amplifiers.Signal routing processing  It is obvious that this processor has 4 input interfaces and 8 output interfaces, commonly known as 4 in and 8 out. This signal routing function can freely control the distribution of signals.For example: we only provide the signal of input A to output 1 and output 2, and the other output channels do not have the signal of input A.Frequency divider  The circuit or device that achieves frequency division is called a frequency divider. Its basic function is to divide the full-frequency audio signal into different frequency bands according to the requirements of the speaker, so that the speaker unit can get a suitable signal.For example: there is a subwoofer in the audio system, and the frequency response range of the subwoofer is 45HZ to 200HZ. At this time, a splitter is needed to process the signal.How to deal with it specifically?Filter a part of the audio signal input to the subwoofer, and only keep the frequency around 45HZ to 200HZ.Howling suppressor  It can suppress howling to a certain extent, which is the same as the howling suppressor on the KTV front-end effector.Contact usEmail: export@sinbosen.comWhatsApp: https://api.whatsapp.com/send?phone=8613342806188FaceBook:https://www.facebook.com/Betty.SinbosenAudio/https://www.facebook.com/sinbosenamplifier/Instagram: https://www.instagram.com/sinbosen.espanol/

What is the role of a digital audio processor?

     Many customers don’t know what the digital audio processor is for when they buy a stage performance audio package. Because there is no such device in the KTV sound system, some stage sound systems are also not equipped with a processor. Some people even regard KTV pre-effects and digital audio processors as one product.    So in the professional stage performance speaker system, what role does the processor play and what specific functions does it have?      How many parts does the stage performance sound system have? We can divide the whole system into 4 parts. 1. Audio source part   Mainly provide audio signals, such as microphones, musical instruments, music players, etc.2. The mixer part    Now they are all digital mixers. The equalizer, compressor, noise gate, and effects are all in the digital mixer. The mixer processes the input signals once, and then mixes them together to control the playback content of each speaker.3. Processor    It is responsible for processing the audio signals mixed by the mixer, and processing these audio signals according to the system and on-site conditions, so that the speakers can better reproduce these audio signals.4. Power amplifier and speakers    The power amplifier and the speaker are responsible for energy conversion. The power amplifier provides energy for the audio signal and drives the speaker to vibrate to play the sound.    Therefore, the processor is in the middle of the professional audio system and plays a role of linking the previous and the next. Why does a digital mixer need a processor?    On an analog mixer, many functions such as howling suppressor, compression, compression, equalization, and delay are not available. So it needs to be equipped with an independent compressor, equalizer, delayer and howling suppressor, or with a processor. But on a digital mixer, it has most of the functions of a digital audio processor! You read that right, most of the functions of digital mixers and processors are duplicated! So many technicians who make stage audio equipment do not have a processor.    However, digital audio processors can be seen in most stage performance audio packages.Why do the functions of the digital mixer and the processor repeat, and we still need to match the audio processor?     The explanation given by many tuner is as follows:1. The parameters of the digital mixer are more complicated, so after connecting the stage performance audio equipment, you can use the previous parameter settings. (Improve work efficiency)2. Sometimes some speakers are added (the brand is not the same), just adjust it directly on the processor. (Avoid changing the mixer parameters)    To sum up, it is: save tuning time and reduce the risk of sound system operation. Contact usContact ViaEmail: export@sinbosen.comWhatsApp: https://api.whatsapp.com/send?phone=8613342806188FaceBook:https://www.facebook.com/Betty.SinbosenAudio/https://www.facebook.com/sinbosenamplifier/Instagram: https://www.instagram.com/sinbosen.espanol/

Why is the sound effect bad during the performance?

        Do you remember the debugging skills and precautions of the stage audio equipment in the performance? Let's review it together. 1. Adjustment of gain2. Noise gate3. Compressor4. Equalizer adjustment5. Reverberation adjustment6. Adjust the return speaker       In the last chapter, we talked about two debugging techniques and precautions for stage audio equipment in performances, but did you know that stage sound effects are not only related to equipment debugging, but also to the tuner. In many live performances, the relationship between the tuner and the singer is not so friendly, the tuner cannot understand the singer, and the singer cannot understand the tuner, so the two are prone to conflicts!Compressor adjustment    When the singer's volume reaches a certain level (threshold), the compressor will start to work to make the voice a little lower. How small is it? Is it a quarter or a percent?This is the compression ratio! Many tuners adjust the threshold value very small, the compression ratio is very large, and the start-up time is very short. As a result, the singer felt that his voice had been suppressed, the volume was very low, and the high pitch could not be raised. Sing with the singing effect of this stage sound equipment, and the singer's voice is not working before a song is finished! There are many factors that cause singers to appear on the scene of a car accident, and it is not the singer's own cause that singing is out of tune!Return speaker adjustment     Some singers felt that the volume of the return speaker was not shocking enough, and went straight to sing in front of the return speaker.In order to prevent the return speakers from whistling, the tuner directly turned off the stage return speakers.At this time the singer was completely panicked! Singers need to send back speakers to distinguish the rhythm and tune of the accompaniment, so that their voice and accompaniment can be better integrated. The main amplifier speaker is facing the audience (back to the singer), so the main amplifier speaker cannot replace the return speaker. If there is no return speaker, no matter how hard the singer sings, he will feel that his voice is too low (even out of tune throughout the concert). After being scolded several times by the singer, many new tuners failed to understand the truth. The tuner cannot understand the singer, nor can the singer understand the tuner, so it is easy to conflict between the two! And this is still an endless loop, and neither side will compromise! Reverberation adjustment     Many tuner habitually add a lot of reverberation effect for a long time (voice is very muddy) to cover up the singer's flaws in singing. That's because this type of tuner has no chance to get in touch with singers who are good at singing! Therefore, I mistakenly believe that all singers are amateur singers, and adjust the effect of reverberation and echo to the greater the better.In fact, many powerful singers hope that the sound from the microphone is clear, clean, and has a higher degree of reproduction. Equalizer adjustment     Many tuners only know how to use an equalizer to eliminate howling. As long as the speakers do not howl, it is a tuning. As a result, the equalizer was messed up, and the sound from the best microphone was not right. In the words of the singer: "I suspect I used a fake microphone"!    In fact, the equalizer is used to beautify the sound, and the elimination of howling is only an incidental function of it. Real tuning masters will work hard on the equalizer, which involves too many parameters and variables.      After reading today's article, do you know why the stage acoustics have become bad? If you feel that the singing effect of the stage audio equipment is not good during the performance, you can refer to the content I wrote.Contact usEmail: info@sinbosen.comWhatsapp: https://api.whatsapp.com/send?phone=8613342806188https://www.facebook.com/sinbosenamplifier/https://www.facebook.com/Dan.SinbosenAudio/      

What are the debugging skills and precautions of stage audio equipment in the performance?

   Whether it is a KTV sound system or a performance stage sound system, a lot of debugging skills and precautions are involved. There is a saying in the audio industry, six points for products, four points for debugging! It is no exaggeration to say that the performance of stage audio is largely determined by the tuner's technique!  Debugging skills and precautions of stage sound equipment1. Adjustment of gain2. Noise gate3. Compressor4. Equalizer adjustment5. Reverberation adjustment6. Adjust the return speaker    This time we will analyze in detail the adjustment techniques and precautions of gain and noise gate.Set up the noise gate   The function of the noise gate is to filter noise. Its working principle is very simple. It defaults the sound below the threshold to noise and eliminates it cleanly.For example, the voice of singing and the sound of ventilation are recorded in the microphone at the same time, and the sound of ventilation is very small, which is regarded as noise and blocked outside the noise gate. If the tuner does not know how to set the parameters of the noise gate, but adds a noise gate to the singer's microphone. Then there will be the following situations:1. The singer's singing voice is treated as noise and filtered. The singer needs to yell to make a sound. This is no longer singing.2. The singer's voice is near the threshold, and the voice is intermittent, similar to the effect of electronic music.3. When the singer sings the high pitch and opens the microphone, because the sound is too small and filtered by the noise gate, there is no sound from the microphone. Gain adjustment     Gain is a very important knob on the mixer. Its function is mainly to control the volume, detail, and effective radio distance. Many tuners don’t know how much the gain should be (the larger the gain, the easier it is to whistle), so simply adjust the gain as much as possible. This will cause the singer's microphone volume to become very weak, and even the singer's voice will be overwhelmed by the accompaniment, and the singing details will not be able to come out. The audience will feel that the singer's singing level is too poor, and the singer is still powerless to sing on the stage! If the tuner understands the singer, adjust the gain knob reasonably so that the singer can show his singing skills, and the singer will enjoy the feeling of singing on stage very much.      There are too many debugging skills and matters needing attention in audio equipment. This time I can only write about the debugging of gain and noise gate. In the next article, we will discuss tuning techniques for compressors, equalizers, reverb and return speakers.Contact usEmail: info@sinbosen.comWhatsapp: https://api.whatsapp.com/send?phone=8613342806188https://www.facebook.com/sinbosenamplifier/https://www.facebook.com/Dan.SinbosenAudio/