With the popularity of the Chinese film market, the increase in the number of new projects around the theater also increased rapidly. Taking into account the economic benefits and audio-visual effects, theater investors always want to get the highest price. In the face of different product solutions and experience theory, investors and even designers of the cinema audio system sometimes can not accurately determine whether their equipment configuration is the most reasonable.

Here the theater also sound system configuration in the amplifier and speaker power of the reasonable match to discuss, share, Oriental good association hope to give practitioners more awareness and thinking.

Power amplifier and speaker ratio

Often troubled us is the power amplifier and speaker power matching problem, which is in the theater to restore the system in the highest proportion of investment. The use of a speaker is how much power amplifier with appropriate? For a long time, the audio industry has always been recognized by the way the power amplifier is rated at 1.2-1.5 times the nominal power of the speaker, in the field of sound reinforcement is also configured to 2 times Case. In short, prefer a large horse car, can not be a small horse carts (especially a kind of theory that the small horses carts lead to amplifier signal is easy to distort, resulting in burning the speaker, which is the so-called small power amplifier easier to burn the speaker Reason, the reality of this phenomenon occurred, and the quality of the amplifier used).

In order to achieve 1.2-1.5 times the amplifier / speaker ratio, investors will invest additional costs to buy more power amplifier. In fact, unlike the sound reinforcement, in the film application, the ＆#118alue is not sustained sound pressure level, but more concerned about the moment the system can achieve the dynamic (short-term shocks of the explosion, shooting). And compared to the continuous use of the powder or sine wave, the contents of music or movie programs in most cases the power is in the rated power of 1/10 state, and most of the 70% of the content of the film is dialogue.

The nominal power of a loudspeaker and amplifier is the maximum average power that can be output without distortion, and the amplifier sine wave test signal itself has an rms voltage ＆#118alue to the peak signal voltage and 1.4 times without distortion, that is, A power of 500Wrms rated power is actually able to output the signal without distortion of 1000 watts.

We come to the conclusion If the speaker selected speakers is 1000Wrms rated power speakers, then use 500Wrms amplifier to promote is feasible, in the need for instant 1000W output is no problem, in the pursuit of the highest cost of investment is a case Kind of good choice.