Audio amplifier suppliers usually release the frequency response of their products and solutions that, sadly, won't necessarily tell you a great deal concerning the quality of sound. I will describe the meaning of this term and additionally provide some suggestions on how to interpret it while looking for an amplifier.
An amp is meant to magnify a music signal enough to drive a set of speakers to moderate or higher volume. Makers usually show the frequency range over which the amp operates. Generally a lower and upper frequency are shown, for instance 20 Hz - 20 kHz. This particular specification suggests that the amplifier will be able to amplify audio within this frequency range. However, there's more to comprehending the amplifier's performance than merely taking a look at these figures.
Then again, the frequency response sometimes is utilized to deceive shoppers by stretching the frequency range a great deal past the range where the amplifier still works properly and in addition hides the reality that the amplifier might not be linear. Thus it is best to possess a full frequency response document. This sort of chart will reveal whether or not there are any sort of substantial peaks or valleys inside the working frequency range. Also you can desire to demand a phase response chart that gives essential clues concerning the quality of sound. In order to better understand the frequency response behavior of a certain type, you should make an effort to find out under which conditions the response was measured. You'll find this information in the data sheet of the amp. Then again, most suppliers won't publish these in which case you ought to get in touch with the maker directly. The fact is that numerous amplifiers will function in a different way with different loudspeaker loads. This is mainly because that various speaker loads can cause changes to the behavior of the output power stage of the amp.
Generally modern digital or "Class-D" amps will show changes in the frequency response with different loads. The main reason is the fact that Class-D amplifiers utilize switching FETs as the power phase which create a lot of switching components. These components are removed using a filter which is part of the amplifier. However, the frequency response of the amplifier now is determined by the loudspeaker load considering that the behavior of this lowpass filter is affected by the load impedance. Usually the lower the speaker load impedance the lower the upper cut-off frequency of the amp
Various amps include feedback as a way to compensate for changes in gain resulting from different attached loads. Yet another technique makes use of audio transformers between the power stage of the amplifier and several outputs. Every output was designed to connect a different loudspeaker load. This approach makes sure that the amplifier is going to be loaded equally and also enhances amplifier efficiency.
An amp is meant to magnify a music signal enough to drive a set of speakers to moderate or higher volume. Makers usually show the frequency range over which the amp operates. Generally a lower and upper frequency are shown, for instance 20 Hz - 20 kHz. This particular specification suggests that the amplifier will be able to amplify audio within this frequency range. However, there's more to comprehending the amplifier's performance than merely taking a look at these figures.
Then again, the frequency response sometimes is utilized to deceive shoppers by stretching the frequency range a great deal past the range where the amplifier still works properly and in addition hides the reality that the amplifier might not be linear. Thus it is best to possess a full frequency response document. This sort of chart will reveal whether or not there are any sort of substantial peaks or valleys inside the working frequency range. Also you can desire to demand a phase response chart that gives essential clues concerning the quality of sound. In order to better understand the frequency response behavior of a certain type, you should make an effort to find out under which conditions the response was measured. You'll find this information in the data sheet of the amp. Then again, most suppliers won't publish these in which case you ought to get in touch with the maker directly. The fact is that numerous amplifiers will function in a different way with different loudspeaker loads. This is mainly because that various speaker loads can cause changes to the behavior of the output power stage of the amp.
Generally modern digital or "Class-D" amps will show changes in the frequency response with different loads. The main reason is the fact that Class-D amplifiers utilize switching FETs as the power phase which create a lot of switching components. These components are removed using a filter which is part of the amplifier. However, the frequency response of the amplifier now is determined by the loudspeaker load considering that the behavior of this lowpass filter is affected by the load impedance. Usually the lower the speaker load impedance the lower the upper cut-off frequency of the amp
Various amps include feedback as a way to compensate for changes in gain resulting from different attached loads. Yet another technique makes use of audio transformers between the power stage of the amplifier and several outputs. Every output was designed to connect a different loudspeaker load. This approach makes sure that the amplifier is going to be loaded equally and also enhances amplifier efficiency.
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