Stereo amp manufacturers frequently release the frequency response of their products that, regrettably, won't necessarily tell you a lot regarding the audio quality. You may possibly not completely understand precisely how the frequency response is determined. I'm going to describe what precisely this particular phrase means. Hopefully you'll be able to make a more informed purchasing decision. An amplifier is able to only function within a specific frequency range. Any kind of signals outside of this range will be eliminated. As a result the frequency response offers a vital hint about whether or not a particular amplifier could be appropriate for a specific application. Typically a lower and upper frequency are shown, just like 20 Hz - 20 kHz. This particular specification indicates that the amp is able to amplify audio inside this frequency range. It may seem the larger the frequency response the better the amp. That, however, might not always be the case. You have to glance at the specs a lot more carefully so that you can adequately interpret them all.
An amp will enlarge an audio signal which is inside the frequency response range. If the frequency range is 20 Hz to 20 kHz for example, the amplifier could amplify any signals with a frequency higher than 20 Hz and lower than 20 kHz. Yet, there is certainly more to understanding the amplifier's performance than just looking at these figures. A large frequency response doesn't imply the amplifier has excellent audio quality. For instance an amp that has a frequency response between 30 Hz and 15 kHz may sound much better than another amp having a response between 10 Hz and 30 kHz. Additionally, every supplier, it appears, implements a different technique for specifying the minimum and maximum frequency of their amps. Usually, the frequency response displays the standard operating range of the amplifier. Inside this range, the amplifier gain is essentially constant. At the upper and lower cutoff frequencies the gain will drop by at most 3 decibels.
Then again, the frequency response quite often is utilized in order to misinform consumers by stretching out the frequency range a great deal beyond the range in which the amplifier still operates effectively and also hides the fact that the amplifier isn't linear. Thus it is ideal to have a complete frequency response document. This kind of graph is going to show if there are any major peaks and valleys within the operating frequency range. You can even want to ask for a phase response diagram that offers vital clues regarding the audio quality. You additionally want to look at the circumstances under which the frequency response was determined. You usually won't find any information about the measurement conditions, unfortunately, in the manufacturer's data sheet. The fact is that a large number of amplifiers are going to behave differently with different speaker loads. This is because of the fact that different speaker loads will result in changes to the behavior of the output power stage of the amplifier.
You furthermore need to look at the conditions under which the frequency response was measured. You generally will not find any kind of details about the measurement conditions, unfortunately, in the manufacturer's data sheet. In fact amps could have different frequency responses depending on the loudspeaker that is attached.
A number of the most recent digital amplifiers feed back the audio signal following the lowpass filter to compensate for this tradeoff and to make the frequency response of the amp independent of the connected load. On the other hand, if the amp is not constructed properly, this sort of feedback might cause instability and also lead to loud noise being produced by the amplifier if particular loudspeakers are attached. Other amps utilize transformers and provide outputs for various loudspeaker loads. Aside from improving the frequency response of the amp, this method typically also improves the amplifier efficiency.
An amp will enlarge an audio signal which is inside the frequency response range. If the frequency range is 20 Hz to 20 kHz for example, the amplifier could amplify any signals with a frequency higher than 20 Hz and lower than 20 kHz. Yet, there is certainly more to understanding the amplifier's performance than just looking at these figures. A large frequency response doesn't imply the amplifier has excellent audio quality. For instance an amp that has a frequency response between 30 Hz and 15 kHz may sound much better than another amp having a response between 10 Hz and 30 kHz. Additionally, every supplier, it appears, implements a different technique for specifying the minimum and maximum frequency of their amps. Usually, the frequency response displays the standard operating range of the amplifier. Inside this range, the amplifier gain is essentially constant. At the upper and lower cutoff frequencies the gain will drop by at most 3 decibels.
Then again, the frequency response quite often is utilized in order to misinform consumers by stretching out the frequency range a great deal beyond the range in which the amplifier still operates effectively and also hides the fact that the amplifier isn't linear. Thus it is ideal to have a complete frequency response document. This kind of graph is going to show if there are any major peaks and valleys within the operating frequency range. You can even want to ask for a phase response diagram that offers vital clues regarding the audio quality. You additionally want to look at the circumstances under which the frequency response was determined. You usually won't find any information about the measurement conditions, unfortunately, in the manufacturer's data sheet. The fact is that a large number of amplifiers are going to behave differently with different speaker loads. This is because of the fact that different speaker loads will result in changes to the behavior of the output power stage of the amplifier.
You furthermore need to look at the conditions under which the frequency response was measured. You generally will not find any kind of details about the measurement conditions, unfortunately, in the manufacturer's data sheet. In fact amps could have different frequency responses depending on the loudspeaker that is attached.
A number of the most recent digital amplifiers feed back the audio signal following the lowpass filter to compensate for this tradeoff and to make the frequency response of the amp independent of the connected load. On the other hand, if the amp is not constructed properly, this sort of feedback might cause instability and also lead to loud noise being produced by the amplifier if particular loudspeakers are attached. Other amps utilize transformers and provide outputs for various loudspeaker loads. Aside from improving the frequency response of the amp, this method typically also improves the amplifier efficiency.
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