The placement method of the amplified speakers (B)

It is important to keep a certain distance between listeners and amplified speakers, because the sound effects can only be generated as a certain depth distance is kept in front of the amplified speakers. If the distance is too small, the sound effect would be greatly reduced. The directivity of the amplified speakers depends on their position and has different effects on the middle/ high part of the sound, the imagining  of the sound field and the width of the sound space felt by the listeners.

The reflection of the room’s wall has a great influence on the overall effect of the timbre. If the amplified speakers are close to the wall, the bass sound would be heard by the ears through the reflection of the wall. At the same time, the low-frequency part of the sound  would more effectively promote the resonance of the surrounding wall and the amplified speakers, so that the bass part of the sound would be strengthened and the sound would be more vigorous and infectious. Therefore, the closer the amplified speakers are placed to the wall corner, the stronger the bass effect that the listeners can hear.

To achieve great bass effect, some amplified speakers should rely on the assistant of the wall. If the amplified speakers are placed far away from the wall, the bass would become thin and hollow. The bass effect of the small-bore amplified speakers can also be improved by being placed close to the wall. This placement method is also applicable to achieve subwoofer. Actually, the placement of the small-bore amplified speakers is casual. This is because the directivity of the bass is not specific; that is, it is more difficult to distinguish its direction source compared with midrange and tweeter. Thus, it is better to place the small-bore amplified speakers at the corner while not necessarily facing the listener. If the inverse phase hole is at the back of the amplified speakers, it is forbidden to put the amplified speaker close to the wall. This is because that the sound wave in the inverse phase hole cannot be completely released, resulting in local rather than whole vibration of the wall and poor sound field effect.