What are passive acoustic systems?

What do concerts, clubs, performances of artists or politicians, mass actions have in common? This is their destination. They should bring music, words, an idea or a song to the listener. The main thing is to louder, so everyone will hear! The decisive role, allowing to achieve the expected effect, in such events is played by audio equipment, that is, passive acoustic systems.

Passive acoustic system is a collection of speakers and speakers of various types, which bring to the listener a powerful sound. Since this industry is developed quite well, there is a large number of various types of acoustic systems. All passive speakers can be classified into broadband and multi-band. What is their difference?

Broadband passive speakers have one sound emitter, that is, a speaker that is designed to reproduce sound with a wide frequency range. Such columns are universal and suitable for those who often organize mini-parties or picnics in their dacha. A huge advantage of such systems is their low price compared to multiband ones.

Multiband passive acoustic systems necessarily combine in their design two or more sound emitters (speakers) that reproduce each of their range of audio frequencies. For example, a system with three speakers works as follows: high frequencies are reproduced by a tweeter or a pitching machine, medium ones are reproduced by mid-range, and low ones are played by low-frequency ones. This solution significantly increased the quality of the reproduced sound and increased the output power.

The main feature that distinguishes passive speakers from active speakers is the lack of a built-in amplifier. This is both a positive and negative trait. The inconvenience of such systems is explained by the need to use additional external amplifiers, without which the operation of passive speakers is impossible. The benefit of such speakers is that there is no need to connect additional power supplies. This is the reason for their use in large areas or open space. Well, when you do not need to stretch a whole wiring harness, and sometimes it's impossible to do.

With the speakers, we sorted it out. Now let's talk about the acoustic design of the system. It can be expressed by an acoustic bass reflex or a box. When manufacturing the box, plastic or wood is used. It should be noted that the speakers, which have a wooden box, reproduce sound much better. The truth and the price for such systems is slightly higher than for "plastic" ones.

An important factor that can affect the price of the product is sensitivity. This is an indicator that characterizes the effort required to "shake" the speakers. The more sensitivity, the smaller the power amplifier they need.