Outdoor performances come in various forms. The audience size is as small as a few hundred to a thousand people, but as large as tens of thousands. Outdoor performances and indoor performances, in terms of sound field effects, it is generally easier to control indoors: some common indoor low-frequency resonance, excessive high-frequency absorption, sound focusing, etc. lead to low-frequency rooms, high-frequency dryness and dimness, and sound field uniformity The descent phenomenon is very easy to solve outdoors. Of course, this is the advantage of outdoor sound reinforcement. Outdoor sound reinforcement is also different from indoor sound reinforcement. There are also many practical problems that need attention from audio workers.
Outdoor performances are generally temporary performance systems that involve a lot of technical content. Colleagues require that they must be completed quickly and with high quality. This requires a complete Zhou Xiang plan to be presented in advance and can be completed through multi-party collaboration. . Bus outdoor performances can be roughly divided into two types: one is various theatrical performances of enterprises and institutions, including some non-commercial theatrical performances such as some sports games, and the other is commercial performances for profit. As a sound designer, the sound equipment should be positioned according to the performance requirements and purpose of the relevant sponsor leader or agent. For example, how many audiences (how big the venue is) and what types of programs are included in the performance: how many electro-acoustic instruments and acoustic instruments (such as commonly used acoustic guitar, violin, trumpet, trombone, erhu, saxophone, etc.) ; The most important thing is the fund price paid by the sponsor or the merchant, which is an important basis for equipment grade positioning. Because only when these are clarified, can the choice of sound reinforcement equipment and peripheral equipment be discouraged. For example, generally speaking, the power required for a small and medium-sized performance with less than a thousand people is about 2000-5000 watts, which has a good intelligibility. A few thousand people are already a relatively large project, and generally require 5000-20000 watts of power. This is not absolute, because if the sensitivity of the speaker is 3db higher, the power can be reduced exponentially. Therefore, the general power tolerance also fluctuates greatly. This is inseparable from your sound design, and the design is reasonable. Of course, the number and grade of power amplifiers and speakers can be reduced.
Outdoor performance speakers, after fully considering the future use of the system and the use of functions, we focus on predictive clarity, sound transmission gain, music playback sound quality, as well as convenient operability and flexible function conversion. In addition, the compatibility, reliability and scalability of the system must be fully guaranteed. The selection and layout of the loudspeaker are important for the design of the entire sound reinforcement system to ease, so the final effect of the electroacoustic system is reflected from this. According to the application function of the performance, the sound reinforcement must take into account performances, small and medium-sized entertainment activities, and multiple-purpose sound reinforcement characteristics: sound reinforcement requires clear language, focusing on mid-frequency sounds; sound reinforcement during singing and dancing performances needs to show music enthusiasm, "The treble goes up and the bass goes down", which requires the sound reinforcement system to have a wide frequency response range.
This set of programs uses CAF brand speakers. The main sound reinforcement box is composed of 12 dual 8-inch linear arrays with full range. It is divided into two groups and hung on the left and right sides of the stage, each with 6; in the sub-bass section, there are two It is composed of dual 15-inch linear subwoofers, which are combined with the main sound reinforcement box for hanging; equipped with 4 single 15-inch two-way full-range speakers as stage return speakers; this set of sound reinforcement configuration can meet 3000 audiences.