RH-AUDIO

  Many people misunderstand it as a stereo system because there are two channels, and the stereo mixer is connected to the system before the stereo amplifier and equalizer are used in the whole system. However, what these systems lack is the uniform coverage of the whole auditory area, as well as the minimal difference in sound pressure level and phase response of each channel to the coverage of the auditory area. If the  two channel 100V amplifie  system plays stereo signals without providing smooth overlapping coverage, half of the people in the listening area can only hear half of the audio content, which makes the dual-channel system a bad choice for music amplification. Most listeners hear a completely different mix of music from others. This is too common an oversight in venues for music and entertainment purposes, even in high-quality venues that should have better system design. It is a common misunderstanding for people with working background of tour or live aud...

  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, ...

  Turn on in accordance with the direction of the sound source signal flow. Amplifier power switch  turn on sequence: turn on the card holder, CD machine, LD machine or VCD machine, tuner, equalizer, and finally turn on the power amplifier. Amplifier power switch turn off sequence: first turn off the power amplifier, then turn off other equipment. So there are delayed plug boards invented abroad. The first group of sockets is direct switch sockets. The second group of sockets, when this machine is turned on, can delay 1 s (seconds) to turn on the power supply. The third group of sockets, when this machine is turned on, can delay 2 seconds to turn on the power supply. The fourth group of sockets, when this machine is turned on, can delay 3 seconds before switching on the power supply. Similar to this, the amplifier power switch is also turned off in different periods. This prevents the phenomenon that surge current and reverse peak voltage act simultaneously on all eq...

  The directivity of  best column speakers  decreases with the decrease of frequency. That is to say, the directivity at low frequencies is very poor. Therefore, the vertical directivity of the sound column should be improved, even if the directivity at high frequency is weakened, while the directivity at low frequency is increased. Usually, the sound column can be divided into high and low frequency bands, followed by a frequency division network, so that the long sound column can produce low frequency sound, while the short sound column can produce high frequency sound to improve its frequency response. Or some important venues commonly used methods, in the frequency band above 1KHz with a high-frequency loudspeaker separated to sound, to improve high-frequency directivity and high-frequency band timbre. Based on the principle of acoustic filter, a layer of sound-absorbing material (such as ultra-fine glass wool) with gradually varying thickness is coated on the best co...

  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...

  We always follow the principle that the ratio of performance to price of equipment selected by public broadcasting system is the best, and ensure that the configuration of public broadcasting system has high economy and practicability. Design of public broadcasting system, classification of broadcasting system manufacturer and public broadcasting system.   According to the scale of the building, the nature and function of the 6 zone amplifier with volume control in modern buildings can be divided into three types:   (1) Business broadcasting system (2) Service broadcasting system (3) Fire accident broadcasting system 1. Operational broadcasting system 6 zone amplifier with volume control   sets up operational broadcasting in office buildings, commercial office buildings, schools, hospitals, railway passenger stations, airports, stations, banks and factories to meet the business broadcasting requirements of business and administrative management. 2. Service broadcas...

  Because the main function of  horn speaker  is to express the delicate sound, the installation position of loudspeaker is very particular. If the installation position is not scientific, the sound field effect will be unsatisfactory. The loudspeaker should be installed as far as possible in the same position as the human ear, such as on the A-pillar of the car, or above the dashboard, and on the door of the car, so that the sound field is basically equal to that of the human ear, and the car owner can appreciate the charm of the music. Horn speakers are used in vehicle, factory, school, station, wharf, shopping mall, shop and other places as power recovery equipment for background music, fire fighting, paging, campus broadcasting. It can also be used in police cars, fire engines, ambulances, patrol motorcycles, security booths, etc., as fire fighting, security, rescue, propaganda, shouting equipment. Good bass effect and life recognition are good choices for broadcastin...