The frequency response is just about the most commonly found parameter to define power amps. However, it can often be confusing and might not necessarily give a good sign of the sound quality. I am going to describe the meaning of this phrase and even give some suggestions on how to interpret it whilst searching for an amplifier. An amp will magnify a sound signal which is within the frequency response range. Typically a lower and upper frequency are listed, for example 20 Hz - 20 kHz. This kind of spec suggests that the amp has the capacity to amplify audio within this frequency range. You might think the larger the frequency response the higher quality the amplifier. That, on the other hand, may not necessarily be. You need to consider the specs much more closely to be able to properly understand them.
An amp is made to enlarge an audio signal enough to drive a set of speakers to moderate or high volume level. Suppliers typically present the frequency range over which the amp functions. 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. Yet, there is more to comprehending the amplifier's overall performance than merely considering these numbers.
The reality is, an amplifier with a frequency response from 10 Hz to 30 kHz may actually have much poorer sound quality than an amp that has a frequency response from 20 Hz to 15 kHz. Different companies apparently employ various methods to define frequency response. The normal convention is to show the frequency range inside of which the amplification will decrease at most 3 dB from the nominal gain. On the other hand, a few companies push this standard to the limit and may list a maximum frequency where the amp is going to barely generate a signal anymore. Additionally, just taking a look at these 2 numbers doesn't say a lot concerning the linearity of the frequency response. Preferably you should really make an effort to get a frequency response diagram from the manufacturer. In this chart, you'll find how the amplifier behaves inside the frequency response range. You may also spot any peaks and valleys the amp could have. Peaks and valleys can cause colorization of the audio. Ideally the gain of the amp ought to be linear throughout the entire operating range.
Mainly modern digital or "Class-D" amps will show changes in the frequency response with different loads. The main reason is the fact that Class-D amps employ switching FETs as the power stage which produce quite a lot of switching components. These components are eliminated using a filter which is part of the amp. The lowpass filter characteristic, however, heavily depends on the attached load.
Some amplifier topologies offer a way to compensate for changes in the amplifier gain with various speaker loads. One of these techniques utilizes feedback. The amplifier output signal after the interior lowpass is input to the amplifier input for comparison. If not designed properly, this approach could cause instability of the amplifier though. Yet another technique uses audio transformers between the power stage of the amp and various outputs. Every single output is designed to connect a different loudspeaker load. This approach makes sure that the amplifier is going to be loaded equally and also enhances amplifier efficiency.
An amp is made to enlarge an audio signal enough to drive a set of speakers to moderate or high volume level. Suppliers typically present the frequency range over which the amp functions. 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. Yet, there is more to comprehending the amplifier's overall performance than merely considering these numbers.
The reality is, an amplifier with a frequency response from 10 Hz to 30 kHz may actually have much poorer sound quality than an amp that has a frequency response from 20 Hz to 15 kHz. Different companies apparently employ various methods to define frequency response. The normal convention is to show the frequency range inside of which the amplification will decrease at most 3 dB from the nominal gain. On the other hand, a few companies push this standard to the limit and may list a maximum frequency where the amp is going to barely generate a signal anymore. Additionally, just taking a look at these 2 numbers doesn't say a lot concerning the linearity of the frequency response. Preferably you should really make an effort to get a frequency response diagram from the manufacturer. In this chart, you'll find how the amplifier behaves inside the frequency response range. You may also spot any peaks and valleys the amp could have. Peaks and valleys can cause colorization of the audio. Ideally the gain of the amp ought to be linear throughout the entire operating range.
Mainly modern digital or "Class-D" amps will show changes in the frequency response with different loads. The main reason is the fact that Class-D amps employ switching FETs as the power stage which produce quite a lot of switching components. These components are eliminated using a filter which is part of the amp. The lowpass filter characteristic, however, heavily depends on the attached load.
Some amplifier topologies offer a way to compensate for changes in the amplifier gain with various speaker loads. One of these techniques utilizes feedback. The amplifier output signal after the interior lowpass is input to the amplifier input for comparison. If not designed properly, this approach could cause instability of the amplifier though. Yet another technique uses audio transformers between the power stage of the amp and various outputs. Every single output is designed to connect a different loudspeaker load. This approach makes sure that the amplifier is going to be loaded equally and also enhances amplifier efficiency.
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