Why home theater amplifiers are not suitable for music amplifiers
Hi-Fi and home theater audio equipment There are two common home amplifiers in the market: Hi-Fi amplifiers and AV amplifiers At times, ordinary consumers often feel at a loss and do not know which one to choose. The author starts with the difference between Hi-Fi power amplifier and AV power amplifier to help you make a preliminary choice. Hi-Fi is the abbreviation of English High-Fidelity, literally translated as high fidelity. It requires audio equipment to amplify and process the indicators of the sound signal without distortion during the playback process, so as to restore the original appearance of the sound source. It is authentic, specially used for listening to music: AV amplifier, as the name suggests, A (audio) means audio, sound, V (video) means audio, image, so AV amplifier is a collection of audio and video signal processing audio-visual amplifiers , which emphasizes the ambience of the sound field, dedicated to home theater. The two power amplifiers are different in terms of technical indicators, sound field atmosphere, number of channels, and circuit design due to their different focuses.
1. Different technical indicators
The technical indicators of high-fidelity Hi-Fi power amplifiers mainly include output power, harmonic distortion, signal-to-noise ratio, frequency range , rated impedance and damping coefficient, etc., with particular emphasis on harmonic distortion and signal-to-noise ratio; while AV power amplifiers also have these technical indicators, but more emphasis on channel isolation, delay time range, various sound field modes and other indicators parameters, In addition, the AV amplifier has more indicators related to the video part.
2. The sound field atmosphere is different
Hi-Fi amplifiers are designed for high fidelity in the way of sound reproduction, and pay attention to the original amplifying signal source The signal sent is mainly used to appreciate music, vocals, etc., and pursue the real effect of the sound. The main design purpose of the AV amplifier is to create a sound field, emphasizing the sense of orientation of the sound, and simulating the atmosphere of the listening environment, such as movie theaters, halls, churches, stadiums, studios, and so on.
3. The number of playback channels is different
Hi-Fi amplifiers generally use two channels for playback, that is, amplify the left and right sound channel signal, and push the left and right speakers to form a stereo sound field. The AV power amplifier has 4-9 channels, which promotes multi-channel speakers to form a surround sound field. For example, Dolby AC-3 requires 5.1 channels. Xiaoqiang Home Theater Shopping Guide welcomes you!
4. Different circuit designs
From the point of view of circuit design or circuit composition, the two power amplifiers are quite different. First of all, the high-fidelity Hi-Fi power amplifier circuit is relatively simple and has few signal processing procedures. It is only a combination of amplification circuit and switching and adjustment circuits: AV power amplifiers have more decoding circuits, delays, reverberation circuits, etc. than Hi-Fi power amplifiers, and It is also responsible for amplifying multiple signals, so it has a high degree of integration, complex circuits, and many signal processing programs. Secondly, the AV power amplifier also has a video circuit on the circuit composition.
We have listed the differences between AV power amplifiers and HiFi power amplifiers. Let me explain in detail, what are the disadvantages of using AV power amplifiers instead of Hi-Fi power amplifiers?
1. The AV amplifier lacks confidence when playing a large signal sound source
This can be seen from the product manual, the AV amplifier is in the two-channel state The output power is higher than the output power in the four-channel state. However, some manufacturers have the same labeling in the manual. At this time, you can choose music with a large dynamic range for audition, but you can obviously feel powerless. This is because the total power consumption of the AV power amplifier is large, and the power reserve is not abundant, while the Hi-Fi power amplifier appears to be calm.
2. AV amplifier wiring will affect the sound quality.
The AV amplifier is set with a variety of video and audio ports, and multiple sets of audio and video signal sources can be connected. As a result, the signal traces are many and complex, and it is easy to cause mutual interference of the signals. In particular, the existence of distributed capacitance has the greatest impact on high-frequency audio and its harmonics, so that the original rich high-frequency components of high-quality signal sources are attenuated or interfered, so that the listener cannot appreciate the high-fidelity effect.
3. The fluorescent screen of the AV power amplifier will also interfere with the sound quality
The AV power amplifier pays attention to convenient multi-function operation. Intuitive and vivid, but the fluorescent screen is heated by a low-voltage AC filament, and the characters are displayed under the drive of a pulse signal, which will radiate a lot of electromagnetic interference around it, which will obviously affect the sound quality.
The difference between these two power amplifiers is mainly the above. If you mainly enjoy film and television movies, then choose AV power amplifier. If you have a soft spot for music, then choose Hi-Fi power amplifier.
