In the field of professional sound reinforcement , audio equipment configuration is very elegant , in which the configuration of the amplifier and speaker is the most important , though, some of the speakers use products are recommended to the user with a specific brand or model of amplifier , but still there are limitations because users often face many types of amplifiers, no start. Amplifier and speaker configuration involves many aspects, such as amplifier brand , power tube type selection and low sensitivity speaker amplifier , etc. which should be configured . The specific configuration of the amplifier and speaker , generally with the designer's experience , hobbies, listening habits and other factors , it is difficult to find a unified standard. Sometimes we will encounter some users or designers to save money often give less power amplifier speaker configuration , some users and for so-called " power reserve sufficient " to great power amplifier speaker configuration . Clearly , this is inappropriate . It is important , this configuration will cause damage to equipment . In amplifier and speaker configuration, amplifier power is indeed crucial , that is, the determination of the power amplifier principle should be unity. As we all know , during hall acoustic design , you need to be calculated and determined based on a series of speaker power , and then determined by the speaker power amplifier power , but how exactly matching the power of both to achieve the best match it ? First , the domain in the human ears 20Hz ~ 20kHz , the true focus of the music signal is generally a lot of energy in the middle and low band, and high-frequency energy is only equivalent to , the low frequency energy of 1/10. Therefore , the power loss generally treble speaker subwoofer is much lower than that , in order to balance the high and low ; the amplifier like a current modulator, which input audio signals under the control of the output current to the speakers of different sizes , so that the occurrence of size different voices , in a certain impedance conditions , to get a nominal power of 400W or 200W amplifier reaches several times the output is actually very easy, just amp distortion (THD) will be greatly increased , this distortion arises primarily in , the low- frequency harmonics in the signal , the larger the distortion , the larger the high frequency harmonic energy , and these high frequency distortion signals are entered together with the high-frequency tweeter music signal , which is why the low-power amplifier push large speaker tweeter burn will occur reason . In many people's concept, only the amplifier power, be possible to burn speakers. Although some indication amplifier without distortion , but the device configuration has deficiencies, distortion may occur when in use , then the distortion indication has lost its meaning . Moreover, since the user's experience and quality constraints, power amplifier distortion is often easily overlooked. Secondly, the power amplifier and speaker configuration and target loudness as well as use the occasion there is a certain relationship . In certain target loudness , you should let the music signal dynamics on each piece of equipment can be fully guaranteed if too much power amplifier whose gain is set very small, loudness has to meet the requirements , but then the gain of the amplifier limits the signal dynamic range . Therefore, the amplifier power is not too large ; otherwise , since wasted expenditure , will bring loudness and dynamic music and sound can not take into account the overloading of trouble. Based on past experience, the general language, music venues and large dynamic amplification of disco and other places there is a difference . There are ups and downs generally small signal amplification place , no longer or will soon provide a great amp current to the speakers, so the amplifier power requirements should be more than powerful place large dynamic amplification power to small ; addition, the so-called " power reserve "should also be concerned for the speaker , it is worth noting that the amplifier must be selected by the speaker decided that there should be no " power reserve "concept to configure the amplifier . In other words, certain target loudness , the speakers can be larger than the design value to prepare for different uses , and the power amplifier should be strictly determined by the speaker , not much flexibility. In short, the power amplifier and speaker configuration specific criteria should be: at a certain impedance conditions, speaker power amplifier power should be greater than , but not too big. In general, the application places the amplifier speaker without distortion rate should be about 1.2-1.5 times the rated power ; while in large dynamic situations then it should be 1.5-2 times. Refer to this standard configuration , since the state can guarantee the best work on the amplifier , but also to ensure the safety of speakers , even for inexperienced operators, as long as not serious mistakes or pre- operating peripheral equipment tuned properly, can make speaker and amplifier operating at steady state.