The frequency response is just about the most often found parameter to define small audio amplifiers. However, it can often be confusing and might possibly not offer a good sign of the sound quality. Manufacturers generally publish the frequency range over which the amp works. This range is specified by showing 2 frequencies: a lower in addition to upper frequency. You could be lured to choose an amp that provides the largest frequency response. Then again, there is certainly more to understanding an amplifier’s overall performance than only realizing this simple range.
In addition, simply reviewing these 2 figures does not say a lot about the linearity of the frequency response. This kind of graph will show whether or not there are any kind of significant peaks and valleys inside the working frequency range. Ideally the amp needs to have a constant amplification within the entire frequency response except for the drop off at the upper and lower limit. In addition to the frequency response, a phase response chart may also say a whole lot in regards to the performance and audio quality of the amp.
One condition that might affect the frequency response is the impedance of the loudspeaker connected to the amplifier. The lower the loudspeaker impedance the higher the strain for the amp.
Mostly current digital or “Class-D” amplifiers can have changes in the frequency response with various loads. These components are removed by a filter that is part of the amp.