AV amplifier or amplifier used in audio-visual systems for home theater audio system, power amplifier complete. AV amplifier generally has a front, center, surround and other 4-channel power output of 7, and some with Dolby Pro Logic Surround decoder or AC-3 decoder, DSP digital sound field processing, FM / AM digital tuner radio function, also has a variety of audio input and output interfaces, and some amplifier also SVIDEO (high definition) video four-pin interface, various functions can be controlled with a remote control, easy to use.
AV amplifier specifications
V amplifier is an important part of home theater, and its performance is mainly determined by the following indicators:
1, SNR means the signal to noise ratio
audio signal level and noise level difference between the dB. The higher signal to noise ratio, the amplifier noise is relatively smaller, sound better.
2, the output power is the power amplifier output power
The speaker then get the energy, the power amplifier, its rated power (under the condition without distortion amplifier for continuous RMS output power) is effective indicators of the performance evaluation of power amplifier.
3, the frequency response
referred to frequency response,christian louboutin mall, measured by an apparatus for high, medium and low frequency signal even the ability to reproduce.
4,louboutin ireland, the output distortion
equipment can not reproduce its input to produce waveform distortion or signal changes in composition as distortion, the smaller the distortion amplifier, the sound quality.
5,
signal dynamic range and the weakest part of the strongest part of the adjustment between the power of equipment, the dynamic range that the signal strength of this equipment on the ability to respond.
6, damping
load impedance and the damping coefficient is the ratio of the amplifier output impedance is a measure of internal resistance of the speaker amplifier role played by the size of a damping performance.
7, the output impedance of the amplifier output impedance
refers to the output terminals on the speakers demonstrated the equivalent internal resistance, it should be rated with the speaker line input impedance.
8, separation
separation refers to the AV amp surround sound decoder in the coded signal to restore the audio signal for each channel's capacity. Poor separation amp sound image localization are not allowed to occur, the sound field is not full, and poor audio-visual coherence of the phenomenon.
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