Someone told me that the DC resistance of pickups are directly related to their output
being an electrical idiot that I am, I have no idea whether this is true or not

so does it pretty much mean the output?

thanks for the help
* Custom "does-it-all" Strat
*'12 James Tyler Studio Elite HD Burning Water (HSH)
* EVH Wolfgang Special Stealth HT
No, it doesn't.

It's a factor in determining the output but it doesn't directly correlate to it.
Actually called Mark!

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^ True. As with speaker impedance, there is a relationship to DC resistance, but that is all.
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The resistance isn't directly related to the output.
A good example is the Dimarzio Steve Morse neck pickup and the D-Activator X bridge model. The D-Activator X has 500mV output and a DC resistance of 14.5k, while the Steve Morse neck has a whopping 21k resistance, but has half the output, with only 250mV.