The frequency response is one of the most frequently found parameter to define power small amps. Having said that, it can often be confusing and might not always give a good sign of the sound quality. You may not completely understand exactly how the frequency response is measured. I will describe what precisely this specific phrase means. Because of this the frequency response provides a vital clue regarding whether or not a certain amp could be suitable for a certain use. Typically a lower and upper frequency are provided, just like 20 Hz – 20 kHz. That, on the other hand, will not always be. You should evaluate the specifications a lot more carefully to adequately understand them. It seems there are various methods that companies utilize whilst specifying the frequency response. Yet, many suppliers ignore this particular established practice. They push the lower frequency and upper frequency to where the amp hardly provides any kind of gain. In addition, these figures tell nothing about precisely how linear the amplifier is working inside this range. Hence it is best to possess a complete frequency response chart. You may even wish to demand a phase response chart that offers essential clues about the sound quality.
However, the frequency response of the amp now will depend on the speaker load considering that the behavior of this lowpass filter is influenced by the load impedance. Normally the lower the loudspeaker load impedance the lower the upper cut-off frequency of the amplifier A few amplifiers include feedback in order to compensate for changes in gain due to different attached loads. Another method utilizes audio transformers between the power stage of the amplifier and various outputs.