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Old 21st May 2012, 10:14 AM   #1
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Default How to integrate Baffle Step Compensation into existing discrete linestage?

Searching for solutions for a line level baffle step compensation I came across this:

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As I don't want to fiddle with additionial opamps in the signal path, I wonder if it is possible to integrate something similar into my AMB α20 line stages:

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Is it possible? And if, how?

Last edited by Groundloops; 21st May 2012 at 10:16 AM. Reason: typo
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Old 21st May 2012, 06:06 PM   #2
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You seem to need only some shelving low frequency boost (or shelving hi freq cut), correct? Your amplifier has global feedback, so the only two places I can see such filter being inserted is:
1.Input. A series resistor and cap network, paralelled with R2. It impacts input Z, which will fall to a few k above center frequency. For this reason, the signal source can change filter behaviour.
2.NFB network. A series resistor and cap network, paralelled with R14. Can mess stability if center frequency is high enough - do proper stability analysis.
Best regards,
Emerson
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Old 21st May 2012, 07:05 PM   #3
gk7 is offline gk7
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Maybe this is of interest:
Loudspeaker Diffraction Loss & Zero PSRR
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Old 22nd May 2012, 11:34 AM   #4
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Quote:
You seem to need only some shelving low frequency boost (or shelving hi freq cut), correct?
Correct!

Quote:
1.Input. A series resistor and cap network, paralelled with R2.
Nah, won't do that. Input Z would be much too low for my uses.

Quote:
2.NFB network. A series resistor and cap network, paralelled with R14.
Will try that tonight and report my findings.

Quote:
Can mess stability if center frequency is high enough - do proper stability analysis.
Will check that with my o'scope.

Quote:
Maybe this is of interest:
Loudspeaker Diffraction Loss & Zero PSRR
More or less the same approach ... Thank you!
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