Audio amp producers generally release the frequency response of their goods that, sadly, doesn't automatically show you a great deal about the sound quality. I will describe the meaning of this term and additionally give some recommendations on how to interpret it while looking for an amp. An amp is built to amplify an audio signal enough to drive a set of speakers to medium or higher volume level. Makers usually show the frequency range over which the amplifier operates. If the frequency range is 20 Hz to 20 kHz as an example, the amp would be able to amplify any signals with a frequency higher than 20 Hz and less than 20 kHz. It may seem the greater the frequency response the higher quality the amp. That, however, will not necessarily be the case. You have to evaluate the specifications a lot more meticulously so that you can properly understand these.
An amp is able to only operate within a specific frequency range. Any signals outside of this range are going to be eliminated. As such the frequency response offers an essential hint concerning whether or not a certain amp might be appropriate for a particular use. This range is specified by listing two frequencies: a lower and also upper frequency. For example, the lower frequency may be 20 Hz and the higher frequency 20 kHz. From this spec it appears the amplifier would be able to operate as a HIFI amp. Yet, there is more to comprehending the amplifier's performance than just considering these numbers.
A large frequency response doesn't imply the amp has excellent audio quality. As an example an amp having a frequency response between 30 Hz and 15 kHz might sound better than a different amplifier with a response between 10 Hz and 30 kHz. Also, every producer, it appears, utilizes a different method of specifying the minimum and maximum frequency of their amplifiers. The most frequently used way is to describe the frequency response as the frequency range within which the amplifier will have quite constant amplification having a maximum decrease of 3 decibel (dB). Generally the decline in gain is highest at the lower and upper frequency. Nevertheless, a lot of makers dismiss this particular established practice. They push the lower frequency and upper frequency to where the amplifier hardly provides any gain. What's more, these numbers tell almost nothing about how linear the amplifier is working inside this range. A complete frequency response chart, on the other hand, will demonstrate if there are any peaks and valleys and in addition show the way the frequency response is to be understood. You may even wish to ask for a phase response diagram that also provides crucial hints in regards to the audio quality.
This change is most apparent with most digital amplifiers, otherwise known as Class-D amplifiers. Class-D amps employ a lowpass filter in their output as a way to suppress the switching components that are produced from the internal power FETs. The lowpass filter characteristic, however, greatly depends upon the attached load.
Several amps integrate feedback as a way to compensate for changes in gain because of different attached loads. Another strategy is to offer dedicated outputs for various loudspeaker impedances that are attached to the amplifier power stage by using audio transformers.
An amp is able to only operate within a specific frequency range. Any signals outside of this range are going to be eliminated. As such the frequency response offers an essential hint concerning whether or not a certain amp might be appropriate for a particular use. This range is specified by listing two frequencies: a lower and also upper frequency. For example, the lower frequency may be 20 Hz and the higher frequency 20 kHz. From this spec it appears the amplifier would be able to operate as a HIFI amp. Yet, there is more to comprehending the amplifier's performance than just considering these numbers.
A large frequency response doesn't imply the amp has excellent audio quality. As an example an amp having a frequency response between 30 Hz and 15 kHz might sound better than a different amplifier with a response between 10 Hz and 30 kHz. Also, every producer, it appears, utilizes a different method of specifying the minimum and maximum frequency of their amplifiers. The most frequently used way is to describe the frequency response as the frequency range within which the amplifier will have quite constant amplification having a maximum decrease of 3 decibel (dB). Generally the decline in gain is highest at the lower and upper frequency. Nevertheless, a lot of makers dismiss this particular established practice. They push the lower frequency and upper frequency to where the amplifier hardly provides any gain. What's more, these numbers tell almost nothing about how linear the amplifier is working inside this range. A complete frequency response chart, on the other hand, will demonstrate if there are any peaks and valleys and in addition show the way the frequency response is to be understood. You may even wish to ask for a phase response diagram that also provides crucial hints in regards to the audio quality.
This change is most apparent with most digital amplifiers, otherwise known as Class-D amplifiers. Class-D amps employ a lowpass filter in their output as a way to suppress the switching components that are produced from the internal power FETs. The lowpass filter characteristic, however, greatly depends upon the attached load.
Several amps integrate feedback as a way to compensate for changes in gain because of different attached loads. Another strategy is to offer dedicated outputs for various loudspeaker impedances that are attached to the amplifier power stage by using audio transformers.
No comments:
Post a Comment