https://www.seymourduncan.com/blog/the-tone-garage/tapping-into-versatility-with-a-tapped-single-coil schrieb:
A standard single coil is a spool of very thin copper wire wound around a set of magnets. The coil has a start and an end, which are connected to the two lead wires coming off the pickup. You connect those two leads, a “hot” lead and a “ground” (or “earth” if you’re from across the pond) lead, to your guitar’s controls. The hot lead comes off the end of the coil, and it’s what carries the sound of your strings from the pickup to your amp.
With a tapped pickup, you get two hot leads. One lead is connected to the end of the coil, just like with a standard single coil. The other is connected to a point somewhere in the middle of the coil, effectively “tapping into” the coil to access a different tone. The tapped lead gives you a lower output version of the full coil, thus giving you access to two tones from the same single coil pickup.
