The difference between HIFI speaker and AV amplifiers speaker
Hi-Fi is Hight-Fidelity, literally translated as a high fidelity, it requires the audio equipment in the playback process, the sound signal indicators are amplified without distortion, processing, in order to restore the original appearance of the sound source, emphasizing the original juice Original taste, dedicated to enjoying music.
AV power amplifier, as the name implies A (audio) that audio, audio, V (video) that video, image, so AV power amplifier is a collection of audio and video signal processing audio amplifier, emphasizing the sound field atmosphere, dedicated to the family cinema.
These two kinds of power amplifiers have different aspects due to their different focuses, which determine their technical specifications, sound field atmosphere, number of channels, and circuit design.
1, the technical indicators of different high-fidelity Hi-Fi amplifier technical indicators are mainly output power, harmonic distortion, signal to noise ratio, frequency range, rated impedance and damping coefficient, in particular, emphasized the harmonic distortion and signal to noise ratio; Although AV amplifiers have these technical indicators, they also emphasize the channel isolation, delay time range, various sound field modes (DSP system, home THX system, Dolby AC-3 system) and other index parameters. In addition, AV amplifiers have more The indicators for the video section.
2, the sound field atmosphere is different Hi-Fi power amplifier on the way to high fidelity for the purpose of design, pay attention to authentically amplified signal sent by the signal source, mainly for the appreciation of music, vocals, etc., the pursuit of the sound of the real effect. The way to put the AV amplifier on the sound is to create a sound field as its main design purpose, emphasizing the sense of orientation of the sound, and simulating the atmosphere of the listening environment, such as cinemas, halls, churches, stadiums, studios, and so on. 3, the number of playback channels different Hi-Fi amplifier is generally two-channel playback, that is, the amplification of the left and right two channels of the signal, and promote the left and right two groups of speakers, constitute a stereo sound field. On the other hand, AV amplifiers have 4-9 channels to drive multiple speakers to create a surround sound field. For example, the Dolby AC-3 requires 5.1 channels (left, center, right, left surround, right surround, and subwoofer).
4, the difference in circuit design From the circuit design or circuit composition point of view, there are major differences between the two power amplifiers. First of all, the high-fidelity Hi-Fi power amplifier circuit is relatively simple, there are few signal processing programs, only the combination of the amplifier circuit and the switching and adjusting circuit: AV power amplifier has more decoding circuit and delay, reverberation circuit, etc. than the Hi-Fi power amplifier. It is also responsible for amplifying multiple signals, resulting in high levels of integration, complex circuits, and many signal processing procedures. Second, there are video circuits on the AV power amplifier.