How to calculate wire length needed on a coil for a given impedance?
Let's say you have a 3" diameter voice coil, using 30 gauge copper round wire. How long does this wire need to be to give you a 2 ohm impedance? I am talking about a single coil here, no dual voice coil configurations.
I know there are programs like SpeaD from Redrock Acoustics that will tell you this, but what is the formula for doing this by hand?
2011 Honda Civic EX Coupe
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