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Originally Posted by johnS
Yep, it all makes sense, except the analogy is exactly backward. A pipe with a bigger diameter allows more water to flow, but from what I've gathered here, an electronic input with a bigger "Ohm" allows less current to flow.
This is unecessarily convoluted and if they ever invent a time machine I'm going back and whacking Dr. Ohm upside the head for inventing such a confusing law.
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The analogy isn't backward, the analogy makes perfect sense, it's simply numbering system that is counterintuitive. 16ohms means more impedance, a smaller hole, less "water" will be allowed to go through. 8 ohms is less impedance, therefore a larger hole, which means more water will be allowed to go through. You are correct though, in that that it takes more "work" to move the same amount of water through a smaller sized holes than the larger.
Here's an amplifier spec, so that you can think about it numerically:
an RMX2450 by QSC
8 Ohms: 500 W
4 Ohms: 750 W
2 Ohms: 1200 W
as you can see, less impedance means an easier flow of current, hence 1200W, and more impedance of flow means that less current will flow for the same amount of original "work"
Wow, I hope that as at least somewhere near clear.