Impedance Equalization Circuit

[presscot]

Hi everyone, with reference to the circuit on attached -- the zobel/ impedance equalization circuit. If we don't know the value of L, Are there any ways to calculate C' without knowing the value of L? I believe this story might be involved in the frequency-domain. Therefore, if we have the data of frequency response, in this case it is a loudspeaker's, such as cut-off frequency or the point where frequency starts to rise, can we use it instead? Please anyone help to explain.

 

[OldDIY]

there: Zobel Or No Zobel ?

 

[presscot]

Sorry, I don’t understand answers in that thread well. Can you please help to explain me in detail?

In brief, can we write or convert L into C or f (frequency) form?

 

[rayma]

Adjust C by measurement until the HF electrical impedance is (approximately) flat and equal to R.
Otherwise, you"ll have to guess by looking at the driver mfr's impedance curve.

 

[AllenB]

without knowing the value of L?

What do you know, the reactance at some frequency?

 

[OldDIY]

The exact balance of the bridge can be achieved at certain frequencies.

 

[Svjatoslav]

The dependence of the speaker impedance on the frequency is not simple.
It is better to determine the value of C by direct measurement.
Although in most cases such accuracy is not necessary.

 

[mbrennwa]

What exactly are you trying to do?

Are you trying to understand the impedances involved in the circuit of your first post on a theoretical level?
Are you trying to implement impedance comensation in a real-world loudspeaker?
Somethin else?