For audio purposes a bit like the opposite of a capacitor.an audio signal, slow changing currents (low frequencies) travel through it easier than fast changing currents (high frequences) If the current changes, like with an Alternating current (AC), ie.Steady current flowing through an inductor is boring.
resists any "change" in electrical current by turning it into magnetic fields.Generally high frequenecies travel through it easier than low frequenecies.This means it affects low frequency signals differently than high frequency signals.But for our purposes this gives it the ability to block Direct Current (DC) electricity but let an audio signal pass through it.resists the flow of any electrical current and turns it into heat.There are essentially three kinds of basic passive components. What they do depends totally on what kind of signal or electricity is fed into them. They don't need batteries or power outlets. It's just that they don't consume any electricity on their own. Now passive parts don't just sit around like your sister in law, looking pretty. In electronics the world divides into passive and active parts. It then will become clearer what a "passive" EQ is. Passive vs Active Electronicsįor those of you who work in audio but steer clear of the messy details of electronics it is important to start with where these terms come from. Sounded like a fun thing to do and we knew it would be an excellent opportunity to find out what this work-horse of the studio really did, so we took on the project.īut before we get to the Pultec performance let's talk a bit about "passive" versus "active" equalizers. So he contacted us to ask if we could assemble it for him. After surveying everything he realized it would take more time than he actually had because he is "the" recording studio up there ( ) and is very busy. Our client needed a Pultec type EQ so he bought the kit and the parts and had everything delivered way up there. You will not believe how far north this is! We have a microphone client who lives in the high Arctic, way up on Baffin Island in Canada, who bought a Pultec Equalizer Kit from DRIP Electronics. The DRIP Electronics EQP-1A kit Equalizer
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