Choice of speakers and power amplifiers in the stereo

In the design of the sound reinforcement system, the total power of the used speakers is first determined according to the power capacity of the sound reinforcement system, and then the total power is proportionally distributed to the left of the main sound reinforcement channel and the auxiliary sound reinforcement channel. The right two channels (the smaller hall can be designed with an auxiliary sound reinforcement channel, and the larger and longer hall can be designed with two or more auxiliary sound reinforcement channels) to determine the number of speakers. In general, the power of the selected main PA channel speaker should be greater than the power of the auxiliary PA channel speaker. If necessary, you can also use a pair of pure subwoofers in the main sound reinforcement channel (the DISCO ballroom should also use pure subwoofers in the auxiliary sound reinforcement channel). The power of the pure subwoofer should be greater than the power of the main speaker and not included in the system power capacity. In some brands of speakers, there are pure subwoofers that are paired with the main speakers (see product description). In addition, for concert halls, theaters, large-scale high-end dance halls. In the DISCO hall, the main sound reinforcement box is preferably a three-point audio box and can be connected to an external electronic crossover.

Speakers of two or three-way frequency produced by different manufacturers in different countries have their own characteristics due to different design and structure of the cabinet, such as:

JBL speaker: strong force, strong penetrating power, strong middle and high sound, its 47.48 series products are professional-grade equipment, MR series products are used more in general dance halls;

BOSE (Ph.D.) speakers: wide frequency response, dynamic, full power, professional sound reinforcement and entertainment sound reinforcement are used;

PEAVEY speaker: The sound structure is solid and powerful, cool and pleasant, the bass is flexible, and the rhythm is strong. It is ideal for the DISCO ballroom.

EV speakers: Clear, transparent, natural, and often used in sound reinforcement systems.

In addition, there are many other brands of speakers, depending on the price and its characteristics, can also be considered.

The choice of power amplifier is a certain requirement. First, different types and power amplifiers should be selected according to the nature, environment and use of the hall. Under normal circumstances, in the dance halls of concert halls, theaters and concerts, the sound reinforcement system should use high-quality power amplifiers with wide frequency response range, small distortion, large signal-to-noise ratio and beautiful sound. For entertaining dance halls, The DISCO hall should choose a high power amplifier. Secondly, it is necessary to select a constant voltage or fixed resistance power amplifier according to the distance of the audio power signal transmission. For long-distance distributed speaker systems such as background music systems or conference systems, constant voltage amplifiers are required. For the sound reinforcement system of the concert hall, theater, dance hall, DISCO hall, etc., the fixed resistance amplifier is selected. In addition, the power amplifier should be configured according to the power of the speaker, and the power of the amplifier should be greater than the power of the speaker.

At present, the excellent power amplifier equipment on the market in China mainly includes CROWN (Crown) and BGW. EV. REAVEY, JBL, QSC and Japanese YAMAHA brands. Power amplifiers are also commonly used in various types of sound reinforcement systems.

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