One-stop in the end is a large indoors question and answer program launched by Jiangsu Satellite TV, different from similar programs; it is positioned as a large-scale entertainment. The film base is 2400m2 studio, nearly 20m high, and the acoustic renovations has not been completed, the reflecting surface is a concrete wall, and the reverberation time is about 4S. There are 11 players, two presenters and more than 400 spectators at the scene. Recording in such an environment, sound reinforcement is required to have sufficient loudness to maintain the atmosphere at the excited state; must also have sufficient clarity so that players and presenters, as well as athletes and players can easily communicate. Players and props operator to hear the whole record in the program in the host's signals; clearly received various levels of mechanical operation and players’ actions; presenters and members of the players but also to ensure the purity of the microphone sound.

A total of 13 microphone headsets, speakers except for the sound pressure level of clarity and frequency, and feedback inhibition have high requirement. For this reason, d &b's MAX, Ci80 and Qi7 3 models are chosen.

About the placing of speakers, MAX is at the level of 60 °, vertical coaxial speakers, we put it in front of the stage about 4m distance from moderator, is enough to cover the host’s range of activities; coupled with good feedback inhibition MAX capacity, the two speakers in front of the stage ensures the main voice loudness and clarity.

In the amplifier, we chose d & b’s D6, and various types of d & b speakers have a corresponding parameter adjustment and easy to use.

This article is taken from the "World Radio and Television" Magazine 2014 February issue