When choosing a brand new amplifier, you almost certainly are going to take a look at the technical specs. One often found parameter is the frequency response. This specification whilst vital will not tell the full story relating to how well the amplifier is going to sound. You will possibly not understand fully just how the frequency response is measured. I will clarify what precisely this specific term means. I hope you'll be able to make a much more well informed purchasing decision. An amp is going to amplify a sound signal which is within the frequency response range. Usually a lower and upper frequency are shown, such as 20 Hz - 20 kHz. This specification shows that the amp has the ability to amplify music within this frequency range. You may very well be lured to decide on an amplifier that provides the greatest frequency response. Then again, there is a lot more to comprehending an amplifier's overall performance than merely realizing this simple range.
An amplifier will enlarge an audio signal that is inside the frequency response range. If the frequency range is 20 Hz to 20 kHz for example, the amp can amplify all signals with a frequency higher than 20 Hz and less than 20 kHz. You could think the greater the frequency response the better the amp. That, on the other hand, might not necessarily be. You have to consider the specs much more closely so that you can properly interpret them.
Actually, an amplifier which has a frequency response from 10 Hz to 30 kHz can actually have much worse audio quality than an amplifier that offers a frequency response from 20 Hz to 15 kHz. Different makers often employ different ways in order to define frequency response. Typically, the frequency response shows the standard working range of the amp. Inside this range, the amplifier gain is essentially constant. At the upper and lower cutoff frequencies the gain is going to decrease by no more than 3 decibels. However, a number of companies push this standard to the limit and will show a maximum frequency where the amplifier will barely deliver a signal any longer. Furthermore, just reviewing these 2 figures doesn't say much concerning the linearity of the frequency response. Subsequently it is ideal to have a complete frequency response document. This sort of chart will show if there are any kind of significant peaks and valleys within the working frequency range. Peaks as well as valleys can cause colorization of the audio. If possible the amp should have a constant gain inside the entire frequency response except for the drop off at the lower and upper limit. Aside from the frequency response, a phase response diagram will also say a whole lot regarding the overall performance in addition to quality of sound of the amplifier.
Primarily contemporary digital or "Class-D" amplifiers can have changes in the frequency response with different loads. The main reason is the fact that Class-D amplifiers employ switching FETs as the power stage that create lots of switching components. These components are removed by using a filter that is part of the amp. The lowpass filter characteristic, on the other hand, greatly depends upon the connected load.
The frequency response of Class-D amplifiers shows the greatest change with various speaker loads because of the built-in lowpass filter that eliminates switching noise from the amplifier's signal. A varying speaker load is going to affect the filter response to some amount. Commonly the lower the loudspeaker impedance the lower the maximum frequency of the amplifier. Furthermore, the linearity of the amplifier gain will depend on the load. Several amps incorporate feedback to compensate for changes in gain due to different connected loads. One more approach uses audio transformers between the power stage of the amplifier and several outputs. Every output was created to attach a different loudspeaker load. This method makes certain that the amplifier is going to be loaded equally and in addition increases amplifier power efficiency.
An amplifier will enlarge an audio signal that is inside the frequency response range. If the frequency range is 20 Hz to 20 kHz for example, the amp can amplify all signals with a frequency higher than 20 Hz and less than 20 kHz. You could think the greater the frequency response the better the amp. That, on the other hand, might not necessarily be. You have to consider the specs much more closely so that you can properly interpret them.
Actually, an amplifier which has a frequency response from 10 Hz to 30 kHz can actually have much worse audio quality than an amplifier that offers a frequency response from 20 Hz to 15 kHz. Different makers often employ different ways in order to define frequency response. Typically, the frequency response shows the standard working range of the amp. Inside this range, the amplifier gain is essentially constant. At the upper and lower cutoff frequencies the gain is going to decrease by no more than 3 decibels. However, a number of companies push this standard to the limit and will show a maximum frequency where the amplifier will barely deliver a signal any longer. Furthermore, just reviewing these 2 figures doesn't say much concerning the linearity of the frequency response. Subsequently it is ideal to have a complete frequency response document. This sort of chart will show if there are any kind of significant peaks and valleys within the working frequency range. Peaks as well as valleys can cause colorization of the audio. If possible the amp should have a constant gain inside the entire frequency response except for the drop off at the lower and upper limit. Aside from the frequency response, a phase response diagram will also say a whole lot regarding the overall performance in addition to quality of sound of the amplifier.
Primarily contemporary digital or "Class-D" amplifiers can have changes in the frequency response with different loads. The main reason is the fact that Class-D amplifiers employ switching FETs as the power stage that create lots of switching components. These components are removed by using a filter that is part of the amp. The lowpass filter characteristic, on the other hand, greatly depends upon the connected load.
The frequency response of Class-D amplifiers shows the greatest change with various speaker loads because of the built-in lowpass filter that eliminates switching noise from the amplifier's signal. A varying speaker load is going to affect the filter response to some amount. Commonly the lower the loudspeaker impedance the lower the maximum frequency of the amplifier. Furthermore, the linearity of the amplifier gain will depend on the load. Several amps incorporate feedback to compensate for changes in gain due to different connected loads. One more approach uses audio transformers between the power stage of the amplifier and several outputs. Every output was created to attach a different loudspeaker load. This method makes certain that the amplifier is going to be loaded equally and in addition increases amplifier power efficiency.
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