RH-AUDIO

  Usually, in order to save time and convenience, we will unplug the  amplifier power switch  when it is turned off, and also directly unplug when it is turned on. In fact, seemingly simple and convenient operation, there are great hidden dangers. (Next, please delineate the key points consciously) Because such operation will generate surge current and reverse peak voltage, it is easy to damage audio equipment and amplifier power switch, thereby reducing the life of the audio system and increasing the purchase cost. What is surge current? Sound equipment is composed of resistors, capacitors, inductors, transformers and other components. They are all in a cold state before starting. When the speaker power supply is turned on, the switching resistance of the amplifier power switch is small, so the instantaneous current is very large, which is 2.5-3.5 times the normal working current. This current is called surge current.   What is backpeak voltage? Inductive elements, ...

  The  best column speakers  is composed of several speakers arranged and connected together. The directional characteristic of the best column speakers is similar to that of a single speaker in the horizontal direction, but greatly improved in the vertical direction. It propagates in wave form in horizontal direction, but has strong directional characteristics in vertical direction, forming a "dish" shaped stereo radiation effect. Install the best column speakers near the stage entrance, point the "sound disc" to the audience, radiate the sound beam to the back of the auditorium with strong sound energy, while the front row weakens each other due to the phase difference caused by the different vertical distance of the speaker, which may be lower than the sound pressure of a single speaker, which makes the distribution of direct sound field tend to be uniform. The horizontal direction of the speaker column should not be "bunching", but should have a larger...

The flat art   mount wall speakers   make sounds through stimulating the bending wave in the soundboard. Its hardcore, that is, the high-tech intelligent actuator is exclusive. Its invention has completely changed the traditional horn technology that has existed for more than 80 years, it is different from the traditional sound box from the vocalism principle to the appearance. It makes sounds when the exciter touches the soundboard making bending wave. The frequency of the soundboard produced by different materials will be different. Its invention completely changes the traditional horn technology that has a history for more than 80 years. From the vocalism principle to the appearance, it is different from the traditional sound box, so the service life of the flat art speaker is longer. Generally, the directivity of a sound box that is made of a traditional horn is very poor. Only when  standing in front of the sound box, can you hear the perfect sounds, especially the p...

The first part is the   modulator . The simplest modulator can be accomplished by using only one operational amplifier to form the comparator. Put the original audio signal to the positive input terminal of the operational amplifier after adding a certain of DC offset. And put a triangular wave (generated by the self-excited oscillation) to the negative input terminal of the operational amplifier. When the potential at the positive terminal is higher than that of the negative terminal triangle wave, the comparator outputs the high level, whereas low level is output. If the audio input signal is zero and the DC offset is 1/2 of the triangle peak value, then the high and low level which is output by the comparator will sustain same period. The output is a square wave with duty ratio (1/2). When there is audio signal input: during the positive half cycle, the duration when comparator outputs high level is longer than that when comparator outputs the low level and the square wave with ...

The Function of Commercial Power Amplifier The amplifier is designed to amplify the weak signal from the audio source or the prime amplifier and to promote the speakers to sound. The amplifier plays an important role in a good speaker system. The amplifier is one of the largest families in all kinds of audio equipment. The main function is to amplify the weaker signal from audio source equipment, then to drive the speaker to playback sound with the produced enough current. Due to considering power, impedance, distortion, dynamic and different serviceable range and control/adjust function, there are different internal signal processing, circuit design and production process for different amplifiers. Performance Index of   Commercial Power Amplifier As for the amplifier main performance index, they are output power, frequency response, distortion degree, signal-to-noise ratio, output impedance, damping coefficient, etc. Output power:   the unit is W. Because each manufactur...

The channel multi zone mixer is a command about color adjustment in the Adobe photoshop software. This command can adjust the color composition of a certain channel. Execute "Image - > Adjust - > Channel mixer [1]" command, and pop-up "Channel mixer" dialog. Output channel: it refers to the channel in which you can choose to mix one or more source channels. The source channels: drag the slider to reduce or increase the percentage about source channel in the output channel; or enter directly values between -200 ~ +200 in the text box. Constant: it refers to the item which you can add an opaque channel to the output channel. If it is a negative value, it is black channel. Monochrome: check this item to apply the same settings to all output channels and to create a grayscale image in this color mode. The working principle of channel Channel   Multi Zone Mixer amplifier   Select a certain channel in the images as the processing target (that is, the output channel)...