Don't Be Mislead By The Manufacturer Ratings Of Recent Stereo Amplifiers
When purchasing a brand new amplifier, you most likely are going to take a look at the technical specs. An often found parameter is the frequency response. This spec even though crucial does not tell the entire story concerning how great the amplifier is going to sound. In order to help you make a more intelligent buying decision, I will make clear what this specification means and how to understand it. This I hope will make sure you will get the perfect amp for your project. An amp is able to only operate within a specific frequency range. Any signals outside this range will be removed. As a result the frequency response gives a crucial clue pertaining to if a particular amp could be suitable for a certain application. Normally a lower and upper frequency are listed, for instance 20 Hz - 20 kHz. This particular specification suggests that the amp will be able to amplify audio inside this frequency range. You may think the greater the frequency response the higher quality the amp. That, however, will not necessarily be the case. You should consider the specifications more closely to be able to properly interpret them all.
An amplifier is built to amplify an audio signal enough in order to drive a set of loudspeakers to medium or higher volume. Manufacturers typically present the frequency range over which the amp functions. This range is specified by listing two frequencies: a lower and also upper frequency. For example, the lower frequency might be 20 Hz and the upper frequency 20 kHz. Using this spec it appears the amp can work as a HIFI amp. You might think the greater the frequency response the higher quality the amplifier. That, however, might not necessarily be the case. You need to look at the specifications much more meticulously in order to correctly interpret all of them.
The truth is, an amplifier which has a frequency response from 10 Hz to 30 kHz might actually have much poorer sound quality than an amp that provides a frequency response from 20 Hz to 15 kHz. Different companies seem to utilize different ways in order to determine frequency response. Normally, the frequency response displays the normal operating range of the amp. Inside this range, the amp gain is basically constant. At the upper and lower cutoff frequencies the gain is going to decrease by no more than 3 decibels. Then again, the frequency response often is utilized in order to mislead buyers by way of stretching out the frequency range a good deal past the range where the amplifier still functions effectively and in addition conceals the fact that the amplifier isn't linear. Consequently it is better to have a full frequency response chart. Such a graph is going to reveal whether or not there are any sort of major peaks or valleys inside the working frequency range. Peaks and valleys can lead to colorization of the music. If possible the amp ought to have a constant gain inside the whole frequency response apart from the drop off at the upper and lower limit. Aside from the frequency response, a phase response diagram may also tell a great deal regarding the performance and also audio quality of the amplifier.
The frequency response of Class-D amps shows the largest change with different speaker loads because of the integrated lowpass filter which removes switching noise from the amplifier's signal. The lowpass filter characteristic, however, heavily depends on the attached load.
Various amps incorporate feedback to be able to compensate for changes in gain because of different attached loads. Yet another approach utilizes audio transformers between the power stage of the amplifier and several outputs. Every single output was created to attach a different speaker load. This method makes sure that the amplifier is going to be loaded equally and in addition increases amplifier power efficiency.
An amplifier is built to amplify an audio signal enough in order to drive a set of loudspeakers to medium or higher volume. Manufacturers typically present the frequency range over which the amp functions. This range is specified by listing two frequencies: a lower and also upper frequency. For example, the lower frequency might be 20 Hz and the upper frequency 20 kHz. Using this spec it appears the amp can work as a HIFI amp. You might think the greater the frequency response the higher quality the amplifier. That, however, might not necessarily be the case. You need to look at the specifications much more meticulously in order to correctly interpret all of them.
The truth is, an amplifier which has a frequency response from 10 Hz to 30 kHz might actually have much poorer sound quality than an amp that provides a frequency response from 20 Hz to 15 kHz. Different companies seem to utilize different ways in order to determine frequency response. Normally, the frequency response displays the normal operating range of the amp. Inside this range, the amp gain is basically constant. At the upper and lower cutoff frequencies the gain is going to decrease by no more than 3 decibels. Then again, the frequency response often is utilized in order to mislead buyers by way of stretching out the frequency range a good deal past the range where the amplifier still functions effectively and in addition conceals the fact that the amplifier isn't linear. Consequently it is better to have a full frequency response chart. Such a graph is going to reveal whether or not there are any sort of major peaks or valleys inside the working frequency range. Peaks and valleys can lead to colorization of the music. If possible the amp ought to have a constant gain inside the whole frequency response apart from the drop off at the upper and lower limit. Aside from the frequency response, a phase response diagram may also tell a great deal regarding the performance and also audio quality of the amplifier.
The frequency response of Class-D amps shows the largest change with different speaker loads because of the integrated lowpass filter which removes switching noise from the amplifier's signal. The lowpass filter characteristic, however, heavily depends on the attached load.
Various amps incorporate feedback to be able to compensate for changes in gain because of different attached loads. Yet another approach utilizes audio transformers between the power stage of the amplifier and several outputs. Every single output was created to attach a different speaker load. This method makes sure that the amplifier is going to be loaded equally and in addition increases amplifier power efficiency.
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