Professional audio systems - large-scale performance solutions

Outdoor performances take a variety of forms. Its audience size is as small as hundreds of thousands of people, as large as tens of thousands of people. Outdoor performance and indoor performance, from the sound field effect, the general indoor is easier to control: some common indoor low-frequency resonance, high-frequency absorption, sound focusing and other causes of low-frequency room, high-frequency dry dark, sound field uniformity decline phenomenon in the outdoor is very easy to solve. Of course, this is the advantage of outdoor sound reinforcement, outdoor sound reinforcement also has many different places from indoor sound reinforcement, among which there are many practical problems that need to be paid attention to by sound workers.

Outdoor performance is generally a temporary performance system, which involves more technical content, and colleagues require that it must be completed quickly and with high quality, which requires a complete plan to be taken out in advance and completed through multi-party cooperation. Bus outdoor performances can be roughly divided into two types: one is a variety of performances by enterprises and public institutions, including some non-commercial performances such as sports games, and the other is a commercial performance for profit. As a sound designer, the audio equipment should be positioned according to the performance requirements and purposes of the relevant host leader or manager. For example, the size of the audience (the size of the venue), what types of performances include: how many electric instruments, how many acoustic instruments (such as commonly used acoustic guitar, violin, trumpet, trombone, erhu, saxophone, etc.); The most important thing is the capital price paid by the organizer or the merchant, which is an important basis for the equipment grade positioning. Because only by making these clear can we pout the choice of sound equipment and peripheral equipment. For example, in general, the power required for small and medium-sized performances of a thousand people is about 2000-5000 watts, which has a better intelligibility, and thousands of people are already relatively large projects, which generally require 5000-20000 watts of power to meet, but this is not absolute, because the sensitivity of the speaker is higher than 3db, the power can be doubled. All, the general power tolerance also has a large float, which is inseparable from your sound design, and reasonable design can of course reduce the number and grade of power amplifiers and speakers.

Outdoor performance speakers, we fully consider the future use of the system and the use of functions, focusing on the clarity of prediction, sound transmission gain, music playback sound quality, as well as convenient operation and flexible function conversion. In addition, the compatibility, reliability and scalability of the system should be fully guaranteed. The selection and layout of the loudspeaker is an important part of the design of the entire sound reinforcement system, so the final effect of the electroacoustic system is thus reflected. According to the application function of the performance, the sound reinforcement should take into account the performance, small and medium-sized entertainment activities, and the characteristics of multi-purpose sound reinforcement: the sound reinforcement requires clear language, focusing on mid-frequency sound; The sound reinforcement in the song and dance performance needs to show the musical heat, "the high voice of the young man goes up, the low voice sinks down", which requires the sound reinforcement system to have a wide frequency response range.

This scheme uses CAF brand speakers. The main sound amplifier consists of 12 double 8-inch linear array full range, divided into two groups hanging on the left and right sides of the stage, each group of 6; In the sub-bass part, it is composed of two double 15-inch linear sub-subwoofers, which are combined with the main sound reinforcement box. It is equipped with four single 15-inch two-divided-frequency full-frequency speakers as stage return speakers; This sound reinforcement configuration can meet 3000 audience.