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Author Topic: An EQ question for George  (Read 982 times)


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An EQ question for George
« on: April 14, 2005, 10:32:26 PM »

Hi George or anyone else with experience in these areas:

Why is it that almost all of the most revered eq's and the ones I find most musical use fixed eq points. I understand that that is just a fact of life with inductors and I am assuming that inductors play a crucial role in the sound of these types of eq's. I read a paper George wrote, I think from the 70's(?), about gyrators offering up many of the benefits of inductors - and with proper design - quieter circuits and gyrators offer sweepable eq points. Cadac made some console micpre/eq modules in the 70's using gyrators but they had fixed eq points. I have a some that will be rebuilt and I'll be interested in listening to what they sound like.

Let me pose this question: Where Neve/Pultec/API/Trident/Helios eq's are concerned, is it not the inductors that are so critical to the sound of these eq's? Is there not plenty of phase shift when applying even modest amounts of eq to the signal? And if so, why do they to my and other folks ears sound so nice?

I am trying to wrap my head around the basics of this stuff and without firsthand experience of what these building blocks intrinsic qualities are I feel lost.

I have other questions regarding euphonix consoles and the like with automatable eq, but that is for future queries. I would be ecstatic to learn about inductors, gyrators and such if y'all wouldn't mind jumpin in.

Joshua Kessler
bushwick  studio
brooklyn, ny
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