High-fidelity audio and home theater audio equipment market two common household power amplifiers: Hi-Fi amplifiers and AV amplifiers, ordinary consumers often feel at a loss, I do not know which one to choose. The author starts with the difference between Hi-Fi amplifier and AV amplifier to help you make a preliminary choice. Hi-Fi is the abbreviation of English Hight-Fidelity. It is literally translated as high fidelity. It requires the audio equipment to amplify and process the various indicators of the sound signal without distortion during the playback process to restore the original appearance of the sound source. It is original and is used exclusively for music: AV amplifiers, as the name suggests, A (audio) means audio, audio, V (video) means audio, image, so AV amplifier is a combination of audio and video signal processing audio amplifier The emphasis is on the atmosphere of the sound field, which is dedicated to home theater. Due to their different emphasis, these two amplifiers have different characteristics in terms of technical indicators, sound field atmosphere, number of channels, and circuit design.
1. Different technical indicators
The technical specifications of high-fidelity Hi-Fi amplifiers mainly include output power, harmonic distortion, signal-to-noise ratio, frequency range, rated impedance and damping coefficient, especially emphasis on harmonic distortion and signal-to-noise ratio; while AV amplifiers also have these Technical indicators, but more emphasis on channel isolation, delay time range, various sound field modes and other indicators, and AV amplifiers have more indicators on the video part. Home theater network decoration network welcomes you
2, the sound field atmosphere is different
The Hi-Fi function is designed with high fidelity in the way of sound reproduction. It pays attention to the signal from the signal source, which is mainly used to appreciate music, vocals, etc., and pursues the real effect of sound. The AV power is placed in the sound mode as the main design purpose, emphasizing the sense of position of the sound, simulating the atmosphere of the listening environment, such as cinemas, halls, churches, stadiums, studios, etc.
3, the number of playback channels is different
The Hi-Fi function is usually two channels when playing, that is, the signals of the left and right channels are amplified, and the left and right two groups of speakers are pushed to form a stereo sound field. The AV amplifier has 4-9 channels, which drive multiple speakers to form a surround sound field. For example, the Dolby AC-3 requires 5.1 channels. Welcome to China Home Theater Network!
4, the circuit design is different
From the perspective of circuit design or circuit configuration, there are big differences between the two power amplifiers. First of all, the high-fidelity Hi-Fi power amplifier circuit is relatively simple, the signal processing program is small, only the combination of the amplifying circuit and the switching and adjusting circuit: the AV power amplifier has more decoding circuits and delays, reverberation circuits, etc. than the Hi-Fi power amplifier, and It is also responsible for amplifying multiple signals, resulting in high integration, complex circuitry, and many signal processing procedures. Secondly, the AV power is placed on the circuit structure as well as the video circuit.
Above we have listed the difference between AV amplifier and HiFi amplifier. Below, the author specifically said, what if there is an shortage of AV amplifier instead of Hi-Fi amplifier?
1. AV power is insufficient when playing a large signal source.
This can be seen from the product manual. The output power of the AV amplifier in the two-channel state is larger than that in the four-channel state. However, some manufacturers' specifications are the same. At this time, you can use a large dynamic range of music to audition, you can obviously feel powerless. This is because the total power consumption of the AV amplifier is large, the power supply reserves are not surplus, and the Hi-Fi amplifier is calm. Welcome to the home theater network shopping guide network!
2, AV amplifier wiring affects sound quality
The AV amplifier sets a variety of video and audio ports, and accesses multiple sets of audio and video signal sources, resulting in many and complicated signal lines, which easily cause mutual interference of signals. In particular, the existence of distributed capacitance has the greatest influence on high-frequency audio and its harmonics, so that the original high-frequency components of the high-quality signal source are attenuated or interfered, so that the listener can not appreciate the high-fidelity effect.
3, the screen of the AV amplifier will also interfere with the sound quality
AV power amplifier pays attention to convenient multi-function operation. The panel is equipped with a large-scale fluorescent display, which makes the operation intuitive and vivid. However, the fluorescent screen is heated by low-voltage AC filament, and the character display is driven by the pulse signal, which will radiate a lot of electromagnetic interference to the surrounding. Affect the sound quality.
The difference between these two kinds of 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.
The PufangTech`s wireless data modem is used to replace standard RS232 and RS485 serial communication cables. It provides a transparent connection between source and destination terminal and requires no knowledge of the data it is transmitting and the data can be simply sent and received with minimal delay.
With 12.5KHz channel spacing, the over-air transmission adopts different modulation scheme to meet various air rates. For air rate below 1200 bps, modulation scheme of FSK is used. For air rate of 1200, 2400 or 4800bps, MSK or FFSK modulation scheme is used. At 8000bps air rate, GMSK modulation scheme is adopted and at 9600bps air rate, the modulation is 4-level FSK. With 25KHz channel spacing, GMSK modulation scheme can support air rate of 16000bps and 4-level FSK can support 19200bps.
PufangTech`s wireless modem can make very beneficial and value added agreements with distributors and system integrators.
Wireless Data Modem Wireless Data Modem,Wireless Radio Modem,Long Range Wireless Modem,Digi Wireless Modem Shenzhen PuFang Technology Co., Ltd. , https://www.hytelus.com
|