【 Weak current College 】 multimedia classroom audio system selection principles

Multimedia classroom audio system you should choose the frequency response, high fidelity systems to fit the multimedia teaching, and has a microphone reverb function, so that teachers can play media content while comments and explanations.
Multimedia system audio equipment configuration can comply with the following three principles:
Concise first principles
Multimedia classroom audio configuration shouldn't like professional stage amplifying device configuration so complex, it is because of two reasons: one is a multimedia classroom use staff more, these action levels, if technical equipment at least some actions are also relatively simple; the second is in the 300 block of multimedia classrooms there is no need to choose a professional stage amplifying equipment. I therefore propose multimedia classroom audio system does not have to configure the mixer and various peripheral devices (such as professional reverb, equalizer, actuators, etc.).
High power principle
Although multimedia classroom acoustics does not like the cinema or singing like huichangdangqi, but I still think that power sufficiently large amplifiers and main speaker on multimedia classroom listening quality is critical, because the power is too low in amplifiers or speakers in order to provide enough sound pressure and work to nonlinear area, at least, can cause two problems: first, the sound system of signal to noise ratio significantly reduced; the second is in the PA, the audio system can easily cause whistling, serious also damage the amplifier or speaker. It is generally believed that the main speaker of the effective output power 1W/person/by Mono left to measurement, AV amplifiers from the main channel rated power as the main speaker power 1.2 times in case you need to have enough dynamic allowance. If a hold 100 people in the classroom, the main speaker for the effective output power 100W, amplifiers rated power of the main channel to 120W. However, in reality, the multimedia classroom amplifiers rated power of the main channel is far enough, sometimes it feels like the sound system to play music to get enough sound pressure level and sound effect, and in effect after the access microphone, great changes have taken place. In fact, you can use the following methods to test: the sound system has no input audio signal is connected microphone (preferably at the same time access three microphone), then turn the amplifiers microphone volume to maximum, listen to the speaker produces AC noise (noise, of course is the less the better), this is a test of the sound system-quality best practices.
Multifunctional principles
In the current school education investment funds also tense, multimedia classroom, versatile relevance. Realization of multimedia classroom for multi-function key to select a compliant AV amplifiers.
In short, multimedia classroom audio system is essential for multimedia system, only part of the rational distribution of audio equipment, to get fit in the classroom, uniform sound field, to give full play to the multimedia classroom teaching effectiveness.