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- Saturating inductors in boost mode acts slightly like dynamic EQ - if you boost a lot AND there's a lot of signal in that region, boost amount reduces. This imo the origin of the pultec's high-freq boost popularity. In cut mode I dunno, haven't investigated. Sounds neutral'ish though, perhaps a bit of expansion mode that way..


-hf (and mf) inductors are in series with their frequency-determining caps, forming resonant ccts, thus not subjected to whole-range power level


- when centered, +phase and -phase from each end of the pot cancels


- yes, we hear increased partials when inductors saturate - but mainly around the frequency tuned (!) which masks the effect significantly


All these side effects are probably the reason why we like inductor/capacitor and passive eq's so much


/Jakob E.


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