FAQ about Company Profile
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FAQ about Microphone
FAQ about Audio Mixer


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/

What problems should be paid attention to when connecting audio system equipment

What problems should be paid attention to when connecting audio system equipment 1. Pay attention to the power supply: It is very important to connect the power supply of all audio equipment correctly and securely. The audio equipment should have a dedicated power supply, which should be separated from the light power supply. Lighting likes a lower voltage, but audio needs a standard voltage. With a dedicated power supply, there must be a stable and reliable power socket. You can use the "power sequencer" as much as possible. Although the cost increases, the stability and ease of use are improved. One more thing to note: some equipment power supplies have 110V and 220V selector switches, you must confirm that you select the voltage in your country before you can connect to power. 2. Pay attention to the ground wire of the equipment: A good ground connection can reduce the interference of equipment signal transmission and improve the stability of the equipment. It should be noted that the grounding wire should be made in accordance with the grounding standard of the lightning protection wire: The conductors buried in the ground should be rust-proof, have good contact, and be buried deep. Do not share it with the grounding wire configured with the three-phase power cord, which will not only reduce the noise in the audio system, but also easily damage the equipment. 3. Pay attention to choosing the appropriate connection signal line: Signal cable type selection: For an audio device, if we can use XLR balanced cable to connect, don't use TRS balanced cable to connect. XLR XLR balanced cableTRS balanced cableTS mono unbalanced cable.Signal line length selection: When connecting equipment, try to use shorter signal lines, first to save costs, and second to reduce line resistance and interference. Under normal circumstances, the signal line using balanced transmission can be up to about 300 meters long, while the unbalanced line cannot be used for long-distance transmission.Signal inversion and short circuit: The signal wire short circuit often causes silent faults, but it is very troublesome to check. Unless one signal line is removed and tested with a multimeter. So be especially careful when soldering wires. Because there are many devices and buttons, misoperations are often prone to occur. So you need to pay special attention to the functions of some buttons to avoid wrong operations. At the same time, the connection process and the connection must be checked. Contact usEmail: info@sinbosen.comWhatsapp: https://api.whatsapp.com/send?phone=8613790017576Facebook: https://www.facebook.com/sinbosenamplifier/https://www.facebook.com/Dan.SinbosenAudio/

Notice! The EU VAT is coming! Sinbosen EU exempts customs free shipping and Tax.

Notice! The EU VAT is coming! Sinbosen EU exempts customs free shipping and Tax. Since1 July 2021, the VAT rules on cross-border business-to-consumer (B2C) e-commerce activities have changed. Everyone in the e-commerce supply chain is affected, from online sellers and marketplaces/platforms both inside and outside the EU , to postal operators and couriers, customs and tax administrations, right through to consumers. 1. Summary of the background of EU tax reform From July 1, 2021, the EU will implement the new version of VAT regulations, with the following two changes for e-commerce platforms:(1) Eliminate the 22-Euro VAT exemption threshold.(2) In some scenarios of the e-commerce platform, VAT will be collected and paid. 2. What is the EU's Value Added Tax (VAT) policy? Value-added tax (VAT) is a turnover tax levied on the value-added amount generated during the circulation of goods and services as the tax basis. All transactions within the EU need to consider the impact of value-added tax. The standard tax rate is 15% to 27%. The EU provides a unified framework, but each country levies it separately. 3. French individual buyers will "transaction restrictions":  150 Euros Individual buyers will restrict cross-border transactions; wholesalers with VAT number can conduct transactions Unlimited for individual buyers. Note for EU customers ordering Sinbosen's products:1. Sinbosen has a European warehouse. You can choose to ship from the European Union: Exempt logistics costs and various taxes. More details. you can contact our customer service directly.2. For shipments from China, Sinbosen can also provide better logistics channels. Please contact our customer service for specific details Sinbosen European overseas warehouse FAQ:https://www.sinbosen.com/f733683/Sinbosen-overseas-warehouse-FAQ.htmContact usEmail: info@sinbosen.comWhatsapp: https://api.whatsapp.com/send?phone=8613790017576Facebook: https://www.facebook.com/sinbosenamplifier/https://www.facebook.com/Dan.SinbosenAudio/

Sinbosen overseas warehouse FAQ

Recently, Sinbosen's overseas warehouses are very popular with customers. I have received many inquiries from customers. Sinbosen compiled some frequently asked questions by customers.FAQ about overseas warehouse.FAQ1: In which countries are Sinbosen's overseas warehouses located?Sinbosen: Sinbosen has 3 overseas warehouses. Respectively in the United States, the European Union-Czech Republic, Mexico.FAQ2: Do I still need to pay customs duties when purchasing products from overseas warehouses?Sinbosen: No need. Products from overseas warehouses are delivered directly to your door without paying any customs duties. Save customers time, energy and money. The logistics is fast and the freight is more economical.FAQ3: My country has high tariffs, but I really want to buy Sinbosen products.Sinbosen: You can buy power amplifiers from overseas warehouses, but the products from overseas warehouses are very popular. If there is a need, customers can confirm the order with the salesperson of Sinbosen as soon as possible. If the power amplifier product you want is out of stock in the overseas warehouse, then don't worry. Sinbosen can provide you with suitable logistics channels.FAQ4: What are Sinbosen's overseas warehouse products?Sinbosen: Including FP series power amplifiers, DSP series power amplifiers, and Digital series power amplifiers(K series and D series). FP series DSP series amplifier D series 2ohms stable K series digital amplifier FP10000Q POWER AMPLIFIER8Ω Stereo Power (RMS): 1,350W X 4CH4Ω Stereo Power (RMS): 2,100W X 4CH DSP10000Q POWER AMPLIFIER8Ω Stereo Power (RMS): 1,300W X 4CH4Ω Stereo Power (RMS): 2,100W X 4CH D4-2000 POWER AMPLIFIER8Ω Stereo Power (RMS): 2,000W X 4CH4Ω Stereo Power (RMS): 3,400W X 4CH2Ω Stereo Power (RMS): 4,760W X 4CH K4-450 POWER AMPLIFIER 8Ω Stereo Power (RMS): 450W X 4CH FP14000 POWER AMPLIFIER8Ω Stereo Power (RMS): 2,400W X 2CH4Ω Stereo Power (RMS): 4,400W X 2CH DSP12000Q POWER AMPLIFIER8Ω Stereo Power (RMS): 1,500W X 4CH4Ω Stereo Power (RMS): 2,800W X 4CH D4-2500 POWER AMPLIFIER8Ω Stereo Power (RMS): 2,300W X 4CH4Ω Stereo Power (RMS): 3,800W X 4CH2Ω Stereo Power (RMS): 5,200W X 4CH K4-600 POWER AMPLIFIER 8Ω Stereo Power (RMS): 600W X 4CH FP20000Q POWER AMPLIFIER8Ω Stereo Power (RMS): 2,250W X 4CH4Ω Stereo Power (RMS): 4,000W X 4CH DSP20000Q POWER AMPLIFIER8Ω Stereo Power (RMS): 2,200W X 4CH4Ω Stereo Power (RMS): 4,000W X 4CH D2-3000 POWER AMPLIFIER8Ω Stereo Power (RMS): 3,000W X 2CH4Ω Stereo Power (RMS): 5,100W X 2CH2Ω Stereo Power (RMS): 7,140W X 2CH K4-1400 POWER AMPLIFIER 8Ω Stereo Power (RMS): 1,400W X 4CH4Ω Stereo Power (RMS): 2,200W X 4CH FP22000Q POWER AMPLIFIER8Ω Stereo Power (RMS): 2,500W X 4CH4Ω Stereo Power (RMS): 4,650W X 4CHD2-3500 POWER AMPLIFIER8Ω Stereo Power (RMS): 3,400W X 2CH4Ω Stereo Power (RMS): 5,700W X 2CH2Ω Stereo Power (RMS): 7,900W X 2CH FAQ5: What are the voltage options for overseas warehouse products?Sinbosen: The U.S. overseas warehouse provides a voltage of 110V. The EU-Czech overseas warehouse and Mexico overseas warehouse provide 220V voltage.FAQ6: How to ship the amplifier?Sinbosen: After receiving your order, we will request the warehouse to deliver it, and there will be a tracking number for you to track the information.US warehouse: It will be shipped via Fedex or UPS.European warehouse: DHL delivery.If you have any questions or suggestions. Contact Sinbosen.Email: info@sinbosen.comWhatsapp: https://api.whatsapp.com/send?phone=8613790017576Facebook: https://www.facebook.com/sinbosenamplifier/https://www.facebook.com/Dan.SinbosenAudio/

What kinds of UHF wireless microphones are there? How to choose?

Some friends think that they are all similar when they hear UHF wireless systems, but they don't know that although the same high frequency band, the circuit design of the receiver transmitter is different, and the function is different.Most of the U section uses SMD components, and the performance is very stable compared to VHF and FM.There are generally three circuits in the U segment, and the sound quality is very good, but the suitable scenes are greatly different.1st type: Single frequency circuit.Many people buy a wireless microphone system with a single-frequency circuit, and they think they are fooled. Because the UHF single-frequency circuit is similar to the V-band circuit, high-frequency amplification and intermediate-frequency amplification. Frequency mixing and frequency discrimination. Step-by-step processing, high-amplification divided into several episodes to enlarge, the sound quality is clearer.Suitable for the crowd: does not meet the interference of the V segment, but the requirements for use are not high.2nd type: Adjustable frequency circuit.This type of machine is controlled by a microcomputer program. The high-frequency oscillation is controlled by a phase-locked loop (PLL). There are multiple channels adjustable, and thousands of adjustable frequency points are available for selection. Effectively avoid interference, multiple machines can be used at the same place at the same time without interfering with each other. If there is interference, adjust the frequency point to other frequency points to avoid interference. The squelch control and audio processing are all new designs. , The performance is stable.Use occasions: This type of machine is used in many high-end KTV rooms. Small and medium-sized concerts. Or when multiple people are required to sing at the same time, the effect is ideal.3rd type: Diversity circuit.Diversity is divided into single frequency diversity and adjustable frequency trial diversity. This type of machine has the functions of U-segment machine, and each channel adopts a two-way receiving circuit system. If there is a dead point in the receiving system of one channel, there is another channel that can receive the signal, which effectively avoids the signal dead zone, greatly improves the technical level of the whole machine, and ensures the stability of the received signal and continuous reception. This type of machine is more advanced wireless microphone. The farthest use distance can reach more than 200 meters.Use occasions: various large and medium-sized concerts. The use environment is very demanding and the use environment is more complicated. This type of machine is the best choice.

FAQ of Kara sound system

Kara line array includes KA210 -- Double 10 inch    KA208 --Double 8 inch.Kara subwoofer includes KA18S --Single 18 inch     KA218 --Double 18 inch.How many audience can be cover by 8 units Kara and 4 units SB18 as a sound system?8 units Kara and 4 units SB18 is perfect for about 3000 to 3500 audience in outdoor and indoor event.What is the angle degree can be adjusted of Kara line array?Kara horizontal directivity is 100 degree. The vertical angle degree is 0.25, 1, 2, 3, 4, 5, 7.5 or 10°What subwoofer can be recommended for the Kara top speakers?For small event or speech application, the KA18S-- single 18 inch subwoofer is good choice. If you need more bass, the KA218 or S-218-- dual 18 inch subwoofer is available.What amplifier can power the Kara and KA18S system?FP10000Q 4x1350W at 8 ohms, 4x2100W at 4 ohms, 4 channel power amplifier is perfect for Kara line array speaker. one FP10000Q can load 4 units Kara(KA210/KA208 )FP7000 2x1450W at 8 ohms, 4x2800W at 4 ohms, 2 channel power amplifier is good for KA18S subwoofer. One FP7000 can load 4 units KA18S.FP14000 2X2400W at 8 ohms, 2x4400W at 4 ohms, 2 channel power amplifier is good for KA218 subwoofer, One FP14000 can load 2 unit KA218 / 4sunits KA18S.FP22000Q 4X2500W at 8 ohms, 2x4650W at 4 ohms, 4 channel power amplifier is good for KA218 subwoofer, One FP22000Q can load 4 units KA218 / 4sunits KA18S.

What is a power sequencer? Is a power sequencer necessary?

Without Power sequencer , equipment may be damaged when starting up! What is the use of the power sequencer in the cabinet? Without it, the audio equipment may be damaged when starting up! Among the many audio equipment placed in the cabinet, many people do not know the audio power sequencer.Some people who don't know the power sequencer even think that this is a worthless device, it doesn't matter whether it has it or not.But is that the case? Of course not.In fact, the audio power sequencer is used to control the on or off of audio equipment. The power is turned on one by one from the front to the back. When the power supply is turned off, the various audio devices are turned off in the order from the back to the front. It is one of the indispensable equipment for sound engineering.When the audio equipment system is normally turned on and off, the power-on sequence is to turn on the front-end audio devices such as microphones, mixers, and effects first, and finally turn on the power amplifier of the back-end equipment. The shutdown sequence is reversed, first turn off the power amplifier of the subsequent audio equipment (note: this can prevent the current from noise impact on the previous equipment and damage the speakers and amplifier), and then turn off the previous audio equipment.If you use a power sequencer and connect to the switch interfaces of different audio devices, you can turn on or off the power from the front-end device to the back-end device one by one, effectively manage and control all kinds of audio devices, and avoid human error operation causing audio The equipment is damaged.The sound system used in large-scale events, because of the existence of a professional tuning team, can use audio equipment proficiently, and the power sequencer is dispensable for them.However, in the audio system used in conference training rooms, KTV entertainment venues, home entertainment living rooms, public broadcasting, etc., due to the lack of professional tuner operations, most of the on-site users have irregular debugging operations, which requires the configuration of power sequencers. So that users can easily manage and control the opening and closing of audio equipment.

What are the types of line array output that can be adjusted by changing the arc of the line array?

In the past ten years, many new wave guide technologies have been produced. The output of the line array can be adjusted by changing the arc of the line array can be roughly summarized into the following four types: ribbon tweeter, horn, acoustic mirror, and acoustic lens.(1) Ribbon trebleDivide the circular outlet of the compression driver into equal parts, and reach the waveguide outlet through several equal-length paths. A typical high-output band tweeter is about 6 inches (0.15m) high, and it can meet the working conditions of line sound sources within the range of no more than 4.5kHz. After this frequency point is exceeded, the influence of side lobes needs to be considered.(2) HornThe horn can provide continuous vertical coverage, but be aware of the limitations of geometric applications. The theoretical basis for changing the circular outlet to the square outlet is that the maximum difference of each path does not exceed λ/8, which is approximately in phase. Therefore, the diameter and depth of the horn must have a good ratio.At the same time, for a line array module with a 12-inch (0.3m) paper cone, multiple compression drives and horns must be installed in a box about 14 inches (0.36m) high to reduce the distance between adjacent units. Try to conform to the working principle of the line sound source.(3) Acoustic mirrorReflective waveguides have been used for decades, but mainly in the microwave field, and have also been introduced to audio in recent years. It appears because the wavelengths of microwaves and sound waves are the same.For example, the sound velocity of 13.76kHz sound waves is about 344 meters per second and the wavelength is 0.25 meters. The speed of light of 12GHz microwave is about 300,000 kilometers per second, and the wavelength is also 0.25 meters. Whether it is microwave or sound, the mirror works in "radiation" mode: due to the short wavelength of the impact energy, all the energy is reflected.Acoustic mirrors complete the waveform transformation from the exit of the compression driver to the exit of the horn through the parabolic mirror. This design must pay attention to the effective frequency range of its "radiation" mode. The low frequency band has a longer wavelength and will cause refraction when encountering obstacles Or diffraction, not reflection.(4) Acoustic lensSimilar to mirrors, lenses have also been used in the field of microwave and acoustic control in recent decades.There are two main types: obstacle type and equal length refraction type. The working principle of the barrier type is like focusing light on a glass lens, similar to a lens. Its baffle (also called a phase plug, can be spherical, disc-shaped, ribbon-shaped or other irregular shapes, as long as it is different for the frequency involved. The size is small enough) when the sound passes through it, the speed of sound will be reduced.An obstructive acoustic lens can produce acoustic focusing, acoustic diffusion or plane waves depending on its shape. The plane wave is used in the online array system. For this type of lens, a specific material must be selected in a specific frequency band. Above a certain frequency band, the material will absorb sound energy and convert it into heat and kinetic energy.Below a certain frequency band, sound waves will pass without obstacles. Of course, these frequency points are very special for individual materials. Typical representative brands are L-Acoustics, ADAMSON and so on. The equal-length refraction type uses a dish-shaped baffle (compared with the wavelength, the space between the spacing is smaller) to strengthen the sound wave to be transmitted to a longer distance. For places where sound waves need to be refracted, the baffle can be placed in a "z" shape or simply inclined. The equal-length refractive acoustic lens can generate plane waves in a wide frequency band.When higher frequencies pass, it works as a "beam effect". When the wavelength is longer, the "wave-like effect" of the acoustic lens will work. At this time, the equal-length refractive acoustic lens will act like closely spaced diffraction grooves. Typical representative brands are Renkus-Heinz and so on.All waveform control techniques borrowed from microwave research are very useful for generating continuous high-frequency wavefronts. Because the spread angle is independent of the path length from the driver to the waveguide exit and the geometry of the horn. The line array loudspeaker using acoustic mirror or acoustic lens waveguide technology can well control the spread angle in the frequency range of 4-6 octave bands.

Common problems and solutions in the use of wireless microphones

Common problems and solutions in the use of wireless microphones With the development of the times, wireless microphones are favored by more and more people. It is because the wireless microphone is convenient and lightweight to use, many people use it to sing, lecture, hold meetings, live broadcast...However, its performance is often affected by various factors such as the frequency interference of the surrounding equipment, the user's wrong operation and other factors, and various failures occur. Let us take an in-depth interpretation of some common problems and solutions in the use of wireless microphones.1. Can I use two microphones of the same frequency at the same time?Cannot be used at the same time. Wireless transmission cannot be "mixed" in the air, and even at the same frequency, the receiver cannot mix two transmitted signals. For example, it is impossible for two FM radio stations to transmit signals on the same frequency. Because this will cause confusion and cause audio distortion. All in all, each wireless transmitter should have a separate receiver and its unique frequency.2. What is the difference between the frequencies of the wireless microphones to avoid interference?This depends on the situation, but less often requires 4MHz. This question cannot be answered clearly because it involves complex calculations. In general, cheaper wireless systems require a larger frequency gap, because their receivers are simple in design and few choices, which limits the number of compatible channels. The higher the price of the system, the better the filtering, the closer the distance between channels, the more compatible channels.3. What is the reason why the microphone cannot be activated?It should be checked whether the battery power is low or the filling is wrong.4. UHF system is better than VHF system, right?The two frequency bands used for wireless microphones have their own advantages and disadvantages. This is determined by the user of the frequency band, the physical characteristics of the frequency band, and the adjustment limits of the frequency band.UHF (U section) system is superior to VHF (V section) system in several aspects:The UHF band is not "crowded" in the VHF band;UHF with flexible frequency has a wider application range;UHF features can provide more compatible systems;UHF system has higher power output than VHF, wider frequency shift, better dynamic range, and better signal-to-noise ratio than VHF.VHF (V section) system is superior to UHF (U section) system in several aspects:The price of VHF system is cheaper than that of UHF;VHF system has a larger transmitting range under a specified transmitting power;VHF signals are highly propagating, even through non-metallic substances. VHF has a long wavelength and is not easily absorbed by the human body.5. Can UHF system be compatible with VHF system?Yes, even if the number of compatible VHF systems is large, it is also compatible with UHF. (But you cannot connect the UHF receiver to the VHF antenna, VHF splitter, or VHF antenna distribution amplifier).6. What should I do if the signal transmission distance is short and the communication is interrupted?1) Check whether the antenna is installed correctly;2) Check whether the weak battery indicator light is on.7. The receiver and microphone are turned on, but there is no signal reception display. Why?1) The receiver and microphone have different frequency points.At this time, you need to replace either one with the same correct frequency. If it is a PLL model and the frequency range of the two is the same, the frequency may be selected incorrectly. Just change the channel selection to the same correct frequency.2) The microphone is malfunctioning.If the above two frequency points are the same, either the microphone or the receiver may be malfunctioning. You can use another microphone of the same model and frequency point for testing. If the receiver can be activated, the original microphone is malfunctioning; Or test with another receiver of the same model and frequency point. If it can be activated, it means that the original receiver is faulty.