This range is specified by showing 2 frequencies: a lower in addition to upper frequency. However, the frequency response often is utilized in order to mislead customers by stretching out the frequency range a great deal beyond the range where the amplifier still works properly and also hides the fact that the amplifier may not be linear. In this chart, you will find the way the amplifier functions inside the frequency response range. You may also discover any peaks and valleys the amplifier could have. In addition to the frequency response, a phase response chart may also say a good deal regarding the functionality as well as audio quality of the amplifier. You furthermore may need to look at the conditions under which the frequency response was measured. You normally will not find any details about the measurement conditions, however, in the producer's data sheet. Typical speaker impedances vary from 2 to 16 Ohms. The lower the speaker impedance the greater the load for the amp.
Mainly contemporary digital or "Class-D" amps can have changes in the frequency response with different loads. Usually the lower the loudspeaker load impedance the lower the upper cut-off frequency of the amp
Various mini amps available from Amphony include feedback in order to compensate for changes in gain caused by different connected loads.… Read the rest