Generally speaking, primary and secondary schools perform speech at hall most the time, so it is very suitable to use line-array column speakers in order to improve speech clarity, and equip them with single-drive subwoofers  to provide deep bass during stage performances. Venues that focus on stage performances, such as community halls, can consider using 2-way box speakers to present more musical rhythms.

Feedback is due to the fact that some frequency come from the speakers is received by the microphone and re-entered the sound system. It is re-amplified again and again in such a loop via the sound system and then is infinitely expanded, eventually turning into a harsh howling.

Frequently feedback indicates that there may be some configuration problems within the sound system, such as the type, quantity, placement & angle of the speakers; the power control and distribution of the amplifier; the microphone gain and volume balance tuned at the mixer; pointing position of the microphone and even the way it has been used, etc., all are connected.

In some school hall where 2-way box speakers are installed, the volume is turned up because the audience in the back row cannot hear the content clearly, result in scattered sound field bounce back even more to the stage, causing feedback. In this case, those speakers can be replaced with line-array column speakers. This type of speaker uses multiple equally spaced parallel units that constructively interfere with each other to send the sound waves farther with less attenuation; allowing the audience in the rear stalls heard clearly, while the audience in the front stalls heard comfortably. The entire sound system configuration can be adjusted to a reasonable level, thereby significantly reducing feedback.

The environment of school Hall generally has a lot of windows, striped wooden walls, ceiling beams and other objects that reflecting sound waves. The vertical dispersion angle of the speaker is relatively wide, and the sound waves attenuate relatively quickly. In addition, the units and installation configuration of speakers in many cases are not enough to fully cover the entire hall, resulting in needs to increase the power for the lack of sound volume. This causes excessive sound reflection, causing the audience in the front row to hear too loud of sound, and those in the back row to hear too much echo sound. The audiences could not hear clearly what the speaker said on the stage.

In this case, the speaker can be replaced with a directional array column speaker. This speaker uses multiple equally spaced parallel units of the same frequency to carry the sound waves farther with less attenuation; allowing the back rows audience can hearing sound clearly, and the audience in the front row can also hear speaker sound comfortably, which effectively improves speech clarity.

剛好相反，數碼混音器的運作流程和類比混音器大致相同之餘，不但能夠使用電子設備（iPad／Notebook／PC）遙距操控，而且配備設置存檔功能，能夠隨時隨地儲存或載入用戶自訂的 板面配置 及／或 頻道配置。將以往每當更改配置後都需要逐步還原的苦惱一掃而空，取以代之的是 以簡單易明的數碼方式管理：無需每次使用音響系統都呼喚技術人員支援。

On the contrary, the operation process of a digital mixer is roughly the same as that of an analog mixer. Not only can it be controlled remotely using digital devices (iPad/Notebook/PC), but it is also equipped with a setting archiving function that can save or load user settings anytime and anywhere. Customized board configuration and/or channel configuration. The previous trouble of needing to gradually restore every time the configuration is changed is eliminated, replaced by simple and easy-to-understand digital management: no need to call for technical support every time you use the sound system.

Recommend to use a digital mixing console and set up a Stage Box behind the stage to provide up to 32 input channels and 16 output channels (Behringer X32 series) for remote control. The stage box only needs to be directly connected to the mixer host through a network cable. This allows all audio equipment, including wireless microphone receivers and amplifiers, to be installed in the backstage cabinet.