The frequency response is probably the most often found parameter to characterize audio amplifiers. Nevertheless, it may often be misleading and may not always give a good sign of the sound quality. To help you make a smarter purchasing decision, I am going to describe what this specification means and how to interpret it. This I hope is going to guarantee you're going to get the ideal amp for your task. An amp is only able to work within the specific frequency range. Any kind of signals outside of this range will be eliminated. As a result the frequency response gives an important hint about if a specific amp may be appropriate for a particular use. If the frequency range is 20 Hz to 20 kHz as an example, the amp can amplify all signals with a frequency greater than 20 Hz and less than 20 kHz. You may be thinking the greater the frequency response the better the amp. That, on the other hand, will not necessarily be. You need to evaluate the specs more closely so that you can adequately interpret them.
It seems like there are many different techniques which makers utilize whilst specifying the frequency response. The most commonly used way is to describe the frequency response as the frequency range within which the amp will have rather constant gain having a maximum drop of 3 decibel (dB). Usually the decline in amplification is highest at the lower and upper frequency.
Seems like there are many different approaches that makers utilize whilst specifying the frequency response. The normal convention is to display the frequency range inside which the gain is going to drop no more than 3 dB from the nominal gain. Then again, a few producers push this standard to the limit and often will list a maximum frequency where the amp is going to barely produce a signal anymore. Furthermore, simply examining these 2 numbers is not going to say a lot concerning the linearity of the frequency response. Ideally you ought to make an effort to obtain a frequency response chart from the supplier. In this chart, you'll discover the way the amp functions inside the frequency response range. It's also possible to discover any kind of peaks and also valleys the amp might have. You can even wish to demand a phase response chart which also provides crucial clues regarding the sound quality.
The frequency response of Class-D amps shows the greatest change with different speaker loads due to the integrated lowpass filter that removes switching noise from the amplifier's signal. The lowpass filter characteristic, on the other hand, heavily depends on the connected load.
Several amps incorporate feedback to be able to compensate for changes in gain due to different attached loads. A different method is to offer dedicated outputs for different speaker impedances that are attached to the amplifier power stage by way of audio transformers.
It seems like there are many different techniques which makers utilize whilst specifying the frequency response. The most commonly used way is to describe the frequency response as the frequency range within which the amp will have rather constant gain having a maximum drop of 3 decibel (dB). Usually the decline in amplification is highest at the lower and upper frequency.
Seems like there are many different approaches that makers utilize whilst specifying the frequency response. The normal convention is to display the frequency range inside which the gain is going to drop no more than 3 dB from the nominal gain. Then again, a few producers push this standard to the limit and often will list a maximum frequency where the amp is going to barely produce a signal anymore. Furthermore, simply examining these 2 numbers is not going to say a lot concerning the linearity of the frequency response. Ideally you ought to make an effort to obtain a frequency response chart from the supplier. In this chart, you'll discover the way the amp functions inside the frequency response range. It's also possible to discover any kind of peaks and also valleys the amp might have. You can even wish to demand a phase response chart which also provides crucial clues regarding the sound quality.
The frequency response of Class-D amps shows the greatest change with different speaker loads due to the integrated lowpass filter that removes switching noise from the amplifier's signal. The lowpass filter characteristic, on the other hand, heavily depends on the connected load.
Several amps incorporate feedback to be able to compensate for changes in gain due to different attached loads. A different method is to offer dedicated outputs for different speaker impedances that are attached to the amplifier power stage by way of audio transformers.
About the Author:
There is more information available about small audio amps from Amphony's web page.
Post a Comment