The frequency response is one of the most frequently found parameter in order to define audio amps. Even so, it can regularly be misleading and may not necessarily give a good indication of the sound quality. I will clarify the meaning of this term and even give some recommendations on how to interpret it while looking for an amplifier.
An amp is created to enlarge a sound signal enough in order to drive a couple of audio speakers to moderate or large volume. Makers usually show the frequency range over which the amp operates. If the frequency range is 20 Hz to 20 kHz for example, the amplifier could amplify all signals with a frequency greater than 20 Hz and less than 20 kHz. It may seem the greater the frequency response the higher quality the amp. That, on the other hand, may well not always be. You should check out the specifications much more meticulously to be able to adequately interpret all of them. It appears there are many different methods that makers utilize whilst specifying the frequency response. The conventional convention is to display the frequency range inside which the gain will drop no more than 3 dB from the nominal gain.
On the other hand, the frequency response sometimes is used in order to misinform buyers by extending the frequency range far past the range where the amplifier still functions properly and in addition covers up the fact that the amp isn't linear. Ideally you should really try to get a frequency response diagram from the manufacturer. In this chart, you will find the way the amplifier behaves within the frequency response range. You can also spot any peaks and / or valleys the amp may have. Peaks as well as valleys might result in colorization of the sound. Preferably the gain of the amplifier needs to be linear over the entire working range.
Mostly current digital or "Class-D" amplifiers will show changes in the frequency response with various loads. The reason is the fact that Class-D amps make use of switching FETs as the power stage which create significant amounts of switching components. These components are removed using a filter which is part of the amplifier. A varying speaker load is going to affect the filter response to a point. Normally the lower the loudspeaker impedance the lower the highest frequency of the amp. Moreover, the linearity of the amplifier gain is going to be determined by the load.
Some amps incorporate feedback in order to compensate for changes in gain because of different connected loads. One more technique uses audio transformers between the power stage of the amp and various outputs. Every output was designed to connect a different speaker load. This method helps to ensure that the amplifier is going to be loaded equally and in addition improves amplifier efficiency.
An amp is created to enlarge a sound signal enough in order to drive a couple of audio speakers to moderate or large volume. Makers usually show the frequency range over which the amp operates. If the frequency range is 20 Hz to 20 kHz for example, the amplifier could amplify all signals with a frequency greater than 20 Hz and less than 20 kHz. It may seem the greater the frequency response the higher quality the amp. That, on the other hand, may well not always be. You should check out the specifications much more meticulously to be able to adequately interpret all of them. It appears there are many different methods that makers utilize whilst specifying the frequency response. The conventional convention is to display the frequency range inside which the gain will drop no more than 3 dB from the nominal gain.
On the other hand, the frequency response sometimes is used in order to misinform buyers by extending the frequency range far past the range where the amplifier still functions properly and in addition covers up the fact that the amp isn't linear. Ideally you should really try to get a frequency response diagram from the manufacturer. In this chart, you will find the way the amplifier behaves within the frequency response range. You can also spot any peaks and / or valleys the amp may have. Peaks as well as valleys might result in colorization of the sound. Preferably the gain of the amplifier needs to be linear over the entire working range.
Mostly current digital or "Class-D" amplifiers will show changes in the frequency response with various loads. The reason is the fact that Class-D amps make use of switching FETs as the power stage which create significant amounts of switching components. These components are removed using a filter which is part of the amplifier. A varying speaker load is going to affect the filter response to a point. Normally the lower the loudspeaker impedance the lower the highest frequency of the amp. Moreover, the linearity of the amplifier gain is going to be determined by the load.
Some amps incorporate feedback in order to compensate for changes in gain because of different connected loads. One more technique uses audio transformers between the power stage of the amp and various outputs. Every output was designed to connect a different speaker load. This method helps to ensure that the amplifier is going to be loaded equally and in addition improves amplifier efficiency.
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