Audio system is an important factor in supporting the activities in the classroom. It is able to provide spatial information in a group or an entire room support. Therefore, the conventional method of learning by allowing the student can be heard in the class is limited because the teacher's voice is not high enough. As a result, content that is not fully understood and that students learn in class are less effective.

So the noise class plays an important role in the efficiency of learning in the classroom. Use high quality audio system of the sound is clearly audible, so the information will be delivered on time. This system is very compact and easy to use.

In carrying out the training, the teacher can adjust the volume of the signal amplifier with a class. Plenary change amplifiers or simply increase the amplitude, so that the voice heard around the room.

With audio system or a gain is very important that educational activities in the classroom in order. students the ability to understand "the information given to the teacher comes mainly from their actions. Besides, if the class is too wide, the voice of the teacher is less clear, so the audio system in the class is necessary.