Audio amp providers usually show the frequency response of their items which, regrettably, won't necessarily show you a great deal about the quality of sound. In order to help you make a wiser purchasing decision, I am going to clarify what this spec means and how to understand it. This ideally will ensure you'll get the perfect amplifier for your task. An amp is going to magnify an audio signal which is within the frequency response range. Ordinarily a lower and upper frequency are listed, for example 20 Hz - 20 kHz. This spec shows that the amplifier has the ability to amplify audio inside of that frequency range. You could possibly be tempted to choose an amplifier that gives the largest frequency response. Then again, there is certainly more to knowing an amplifier's functionality than simply knowing this simple range.
An amp is able to only work within the specific frequency range. Any signals outside of this range will be removed. As such the frequency response gives a significant hint about whether or not a certain amp could be suitable for a particular use. If the frequency range is 20 Hz to 20 kHz as an example, the amp could amplify any signals with a frequency greater than 20 Hz and lower than 20 kHz. Yet, there is much more to comprehending the amplifier's functionality than simply reviewing these numbers. In reality, an amp with a frequency response from 10 Hz to 30 kHz can actually have much worse audio quality than an amplifier that has a frequency response from 20 Hz to 15 kHz. Different manufacturers appear to make use of different ways to establish frequency response. Usually, the frequency response displays the standard operating range of the amplifier. Within this range, the amp gain is basically constant. At the lower and upper cutoff frequencies the gain will drop by at most 3 decibels.
On the other hand, the frequency response sometimes is used to deceive consumers by way of stretching the frequency range a good deal beyond the range in which the amp still works effectively and in addition hides the reality that the amplifier may not be linear. Subsequently it is best to possess a full frequency response graph. This kind of graph is going to show if there are any kind of considerable peaks or valleys within the working frequency range. You can even desire to request a phase response chart that offers crucial clues regarding the sound quality.
You furthermore will want to look at the conditions under which the frequency response was determined. You normally are not going to find any information about the measurement conditions, however, in the maker's data sheet. Actually amplifiers might have different frequency responses depending on the speaker that is connected.
A few of the latest digital amps feed back the music signal after the lowpass filter to be able to compensate for this tradeoff and also to make the frequency response of the amplifier independent of the attached load. Then again, if the amplifier is not constructed properly, this type of feedback may cause instability and bring about loud noise being created by the amp if certain speakers are attached. A different technique is to offer specific outputs for various speaker impedances which are connected to the amp power stage by using audio transformers.
An amp is able to only work within the specific frequency range. Any signals outside of this range will be removed. As such the frequency response gives a significant hint about whether or not a certain amp could be suitable for a particular use. If the frequency range is 20 Hz to 20 kHz as an example, the amp could amplify any signals with a frequency greater than 20 Hz and lower than 20 kHz. Yet, there is much more to comprehending the amplifier's functionality than simply reviewing these numbers. In reality, an amp with a frequency response from 10 Hz to 30 kHz can actually have much worse audio quality than an amplifier that has a frequency response from 20 Hz to 15 kHz. Different manufacturers appear to make use of different ways to establish frequency response. Usually, the frequency response displays the standard operating range of the amplifier. Within this range, the amp gain is basically constant. At the lower and upper cutoff frequencies the gain will drop by at most 3 decibels.
On the other hand, the frequency response sometimes is used to deceive consumers by way of stretching the frequency range a good deal beyond the range in which the amp still works effectively and in addition hides the reality that the amplifier may not be linear. Subsequently it is best to possess a full frequency response graph. This kind of graph is going to show if there are any kind of considerable peaks or valleys within the working frequency range. You can even desire to request a phase response chart that offers crucial clues regarding the sound quality.
You furthermore will want to look at the conditions under which the frequency response was determined. You normally are not going to find any information about the measurement conditions, however, in the maker's data sheet. Actually amplifiers might have different frequency responses depending on the speaker that is connected.
A few of the latest digital amps feed back the music signal after the lowpass filter to be able to compensate for this tradeoff and also to make the frequency response of the amplifier independent of the attached load. Then again, if the amplifier is not constructed properly, this type of feedback may cause instability and bring about loud noise being created by the amp if certain speakers are attached. A different technique is to offer specific outputs for various speaker impedances which are connected to the amp power stage by using audio transformers.
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