A pickup with a low DC resistance will generally sound thinner and twangier, with more pronounced attack and clearer treble. A hotter wound pickup will sound warmer with more pronounced mids, dampened treble, and drive the amp a little harder as well. Other factors such as magnet strength and pole piece distance each play their own part, but the resistance, or at least the number of winds, plays one of the largest roles in the overall shape of the sound. That in mind, I decided to measure a few of my own guitars and share the results for the science-y aspect of it and hope that you find it interesting, if not necessarily extremely useful.
The "standard" by which many other pickups can be measured is the original Gibson PAF humbucker. Famous on all the classic,
Finally I checked the resistance of the Ibanez RG8 eight string. The neck pickup was a fairly hot 12K ohms but the bridge was an astounding 25K ohms. On a six string, this would be a blasting-ly compressed and hot pickup, but spread out on the 8 string scale it manages to be rather weak and thin sounding, quite surprisingly. Perhaps in this case the magnets have something to do with the output as well, because even adding another two strings, 25K ohms should be enough to put out a meatier tone, but I suppose there's a lot more to it than general intuition.
In the meantime, I've been scouring the internet for other pickup specs and I have an Excel spreadsheet in the works to get together a reasonably comprehensive and unified resource for any other curious pickup dabblers, let me know if you'd be interested in helping find some of the specs for that project :)
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