As the most basic equipment in the audio system, the power amplifier plays a decisive role in the effect of the entire home theater, so we should be very careful when purchasing. The main performance indicators of the power amplifier are output power, frequency response, distortion, signal-to-noise ratio, output impedance, damping coefficient, etc. In fact, we can’t see how many power amplifiers are good or bad in the manual, so when we buy, we choose the power amplifier that suits us more based on our actual feelings, the size of the sound chamber and the love of sound. How to choose home amplifier audio? From getting started to mastering, I’m here to help you step by step.
What is an amplifier? In layman’s terms, in fact, the power amplifier is what we call “amplifier”. Its function is to amplify the weak signal from the audio source or the pre-amplifier and push the speaker to play. The role of a good sound system amplifier is indispensable.
Amplifier classification:
1. Professional amplifier: This type of amplifier is mainly used for conferences, performances, It is used in larger places such as halls, halls, and fields. The design focuses on high output power, perfect protection circuit, and good heat dissipation. When the sound is used for HI-FI playback, the sound is hard and hard to listen to.
2. Civil power amplifiers: There are HI-FI power amplifiers, AV power amplifiers, KALAOK power amplifiers, and the so-called “comprehensive power amplifier” that integrates various common functions.
3. Special power amplifier: “Special power amplifier” as the name suggests is the power amplifier used in special occasions, such as alarms, low-voltage power amplifiers for cars, etc. This kind of power amplifier usually has a special venue and use.
How to choose the paint level of the power amplifier and audio PAINT INDUSTRYS TOP LEVEL First, the power selection of the power amplifier To a certain extent, the greater the power, the more sufficient its power, the easier it is to push the speaker, This makes it easier to get good sound from the speakers. However, the sound pressure that each person can bear is limited, and the listening space of ordinary families is also limited. Therefore, when purchasing a power amplifier, it seems a bit one-sided to only pursue high power. Generally speaking, a 50W output power amplifier is enough to drive a pair of speakers with an efficiency above 86dB to obtain the desired effect. 2. The weight of the power amplifier is the heavier the power amplifier, the better? Any power amplifier depends on the power supply to provide energy to work. In order to make the power amplifier have enough energy supply when it outputs high power, a good power amplifier is often designed to keep the DC power supply with enough power. The power amplifier must use a heavyweight large-capacity transformer, and some even use double transformers. The weight of a power amplifier depends largely on the weight of the transformer and the chassis. Third, the signal-to-noise ratio of the power amplifier The signal-to-noise ratio refers to the ratio of the signal amplitude to the noise amplitude. Since this indicator is inversely proportional to the output noise of the power amplifier, the larger the signal-to-noise ratio, the smaller the output noise of the power amplifier and the higher the quality. Therefore, when choosing a power amplifier, of course, the larger the signal-to-noise ratio, the better. The greater the signal-to-noise ratio, the more we can hear the music with comments such as quiet background, clear and transparent audio and video. Fourth, the selection of power amplifier grades With the advancement of technology, the service life of the electronic tube has been extended, coupled with the characteristic warm and sweet sound quality, and the relatively high quality and low cost, which also makes the tube in the middle and low-end power amplifiers. repercussions. Although the timbre of the tube amplifier is indeed better than that of the transistor in terms of sound flexibility, it is not the case in the high-end machine. Therefore, in the low-end power amplifier, we can choose the tube, and in the high-end product, we can choose according to our own. Likes come.
