Power amp providers usually publish the frequency response of their goods that, sadly, will not always show you a lot regarding the sound quality. To help you make a wiser purchasing decision, I'll describe what this spec means and the way to interpret it. This hopefully will make certain you're going to get the best amp for your project.
A large frequency response does not necessarily mean the amp offers excellent audio quality. For example an amp with a frequency response between 30 Hz and 15 kHz might sound better than a different amp having a response between 10 Hz and 30 kHz. Also, every producer, it seems, implements a different technique of specifying the minimum and highest frequency of their amplifiers. The most regularly used way is to describe the frequency response as the frequency range within which the amplifier has quite constant amplification having a highest drop of 3 decibel (dB). Ordinarily the decline in gain is greatest at the lower and upper frequency.
However, several makers push this standard to the limit and tend to show a maximum frequency where the amplifier is going to hardly generate a signal anymore. Furthermore, merely reviewing these 2 numbers won't say a lot concerning the linearity of the frequency response. Therefore it is ideal to have a full frequency response graph. This kind of chart will reveal whether or not there are any sort of substantial peaks or valleys inside the operating frequency range. You may even desire to demand a phase response chart that also provides vital clues regarding the quality of sound. The circumstances under which the frequency response was determined may also be important to recognize. The fact is that lots of amplifiers are going to work differently with different loudspeaker loads. This is because of the fact that different loudspeaker loads will result in changes to the behavior of the output power stage of the amplifier.
This change is most detectable with most digital amplifiers, also referred to as Class-D amplifiers. Class-D amplifiers employ a lowpass filter inside their output in order to reduce the switching components which are created by the internal power FETs. A varying loudspeaker load is going to impact the filter response to some amount. Usually the lower the loudspeaker impedance the lower the highest frequency of the amplifier. Furthermore, the linearity of the amplifier gain is going to be determined by the load.
A number of amplifiers incorporate feedback to compensate for changes in gain because of different connected loads. Other amps utilize transformers and offer outputs for different speaker loads. Apart from improving upon the frequency response of the amplifier, this technique typically also improves the amplifier power efficiency.
A large frequency response does not necessarily mean the amp offers excellent audio quality. For example an amp with a frequency response between 30 Hz and 15 kHz might sound better than a different amp having a response between 10 Hz and 30 kHz. Also, every producer, it seems, implements a different technique of specifying the minimum and highest frequency of their amplifiers. The most regularly used way is to describe the frequency response as the frequency range within which the amplifier has quite constant amplification having a highest drop of 3 decibel (dB). Ordinarily the decline in gain is greatest at the lower and upper frequency.
However, several makers push this standard to the limit and tend to show a maximum frequency where the amplifier is going to hardly generate a signal anymore. Furthermore, merely reviewing these 2 numbers won't say a lot concerning the linearity of the frequency response. Therefore it is ideal to have a full frequency response graph. This kind of chart will reveal whether or not there are any sort of substantial peaks or valleys inside the operating frequency range. You may even desire to demand a phase response chart that also provides vital clues regarding the quality of sound. The circumstances under which the frequency response was determined may also be important to recognize. The fact is that lots of amplifiers are going to work differently with different loudspeaker loads. This is because of the fact that different loudspeaker loads will result in changes to the behavior of the output power stage of the amplifier.
This change is most detectable with most digital amplifiers, also referred to as Class-D amplifiers. Class-D amplifiers employ a lowpass filter inside their output in order to reduce the switching components which are created by the internal power FETs. A varying loudspeaker load is going to impact the filter response to some amount. Usually the lower the loudspeaker impedance the lower the highest frequency of the amplifier. Furthermore, the linearity of the amplifier gain is going to be determined by the load.
A number of amplifiers incorporate feedback to compensate for changes in gain because of different connected loads. Other amps utilize transformers and offer outputs for different speaker loads. Apart from improving upon the frequency response of the amplifier, this technique typically also improves the amplifier power efficiency.
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