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Hi!
I would like to know if i have one ordinary audio amplifier and if i change volume (gain) at this amplifier is this influence to input impedance ?
so if i have 10% louder or 80% is impedance change ?
I hope so that you understand me what i mean.
On an operational amplifier the input impedance will change with the set gain. A unity gain operational amplifier gives a near infinite input impedance.
Raise the feedback resistor to obtain some gain and input impedance decreases.
On other types of amplifiers, it may not be the case.
Miguel
Input Sensitivity/Impedance
CD/DVD, etc. ............................................... 150 mV/47 khm:
PHONO ........................................................ 2.5 mV/47 khm:
Output Level
REC OUT ................................................... 150 mV/1.6 khm:
Headphone Output ............................................. 0.25V/680hm:
higher sensitivites mean lower levels of input signal the voltage levels and power are most often rms values, higher sensitivies mean that the amp can be driven from sources with lower level
OK, I found another explanation, is it correct?
I don't understand what is bold. If amp have higher sensitivies (input signal can be higher consequently input level can be higher no lower ? )
hi,higher sensitivies mean that the amp can be driven from sources with lower level