Hi!

Everybody talks about the frequency response of the amps.

And almost everybody means how the voltage gain of the amp varies over a range of frequencies.

But frequency response is not only that. It is also the phase shift of the output signal in comparison to the input signal over a range of frequencies. I have hardly heard anything about this aspect of frequency response. Shoudn’t this phase shift be ideally constant (0 or Pi rad) over the audio frequencies, just like the amplitude of the ouput voltage should ideally be the same at all frequencies? Are phase shifts no so “bad”? What values are acceptable?

Everybody talks about the frequency response of the amps.

And almost everybody means how the voltage gain of the amp varies over a range of frequencies.

But frequency response is not only that. It is also the phase shift of the output signal in comparison to the input signal over a range of frequencies. I have hardly heard anything about this aspect of frequency response. Shoudn’t this phase shift be ideally constant (0 or Pi rad) over the audio frequencies, just like the amplitude of the ouput voltage should ideally be the same at all frequencies? Are phase shifts no so “bad”? What values are acceptable?