Connection method of feedback suppressor

Professional audio enthusiasts, familiar with the common speakers, courage, power amplifier after the first stage, and so on, but in order to obtain outstanding sound quality effect, response press is indispensable, about professional audio-visual enthusiasts may understand, but for the general public, response press press is ultimately what role? ? The following is the first analysis of the underlying concepts.

Reaction presser is a device that actively presses the microphone's whistling feed point. When the microphone's whistling is present, it will immediately find and calculate its frequency and attenuation, and according to the calculation results, it will fulfill the instructions of the response according to the whistling. It is also called microphone whistling presser. It is a necessary equipment for KTV and other places. The reaction press eliminates the feedback screaming phenomenon, and together adheres to the method and process of sufficient volume and outstanding sound quality. In many occasions, such as meetings, performances, speeches, lectures, etc., an outstanding sound reinforcement system is essential. In practice, we often encounter problems of one kind or another, in which the screaming caused by feedback is the most common and most headache. Not only harsh, but also great damage to loudspeaker or even power amplifier system.

In the early days, segmented equalizer (EQ) was often used as an acoustic response restraint device. Because the EQ filter is fixed and immutable, it can not be precisely positioned to the feedback point. In addition, because of the wider bandwidth and deeper notch depth of EQ filter, a lot of sound power will be lost in the process of application. The appearance of the response restraint overcomes many shortages of the equalizer as a voice response restraint device. Compared with the segmented graphic equalizer, it has three advantages: first, it has the active function, after setting up, it does not need the sound engineer to adjust manually; secondly, it can actively search and accurately locate the feedback frequency point; third and most important advantage is that the macro-filter of the reaction press does not have to be done very deep or very wide, it is more than the multi-segment EQ. The filter is tens of times narrower, which means the acoustician can push the system gain higher without screaming.

After we understand the functional features of the reaction press, let's look at the interface of the reaction press in professional acoustics. Reaction press is also used in equipment connection XLR connection of the balance line or TRS connection of the balance line, then his connection method can be roughly divided into three kinds:

Top 1: Knowing how to connect the audio system in sequence like the equalizer and other peripherals, let's take a look at the advantages of this connection: it's very simple to connect and operate, and it's suitable for a simpler system. However, it is also defective, its defect is: this cohesion method in the press microphone sound response, will also affect the response to press the other source signal.

Secondly, the INS in the mixer channel can also be used to pierce in and out the interface, and the reaction can be independently connected in series with the corresponding channel according to the pad. The advantage of this connection is that it can adjust the reaction according to the pad to the maximum extent, regardless of the impact on other sound sources. However, its drawback is: using this method of convergence, a reaction press can only operate at most two channels of the mixer, equipment utilization rate is too low.

Third, the use of mixer marshalling INS in the plug-in interface, the response will be in series according to the pad in the corresponding marshalling channel, the advantages of this approach is: can be marshalled into this group of microphones for assembly processing, and will not affect other sound sources. Generally speaking, because this method can fully use the reaction pad, it is also currently the most used method of cohesion.