Depending on the guitar there can be one, two, or more of them, of varying types and configurations. The test signal is induced by an electromagnetic coil placed near the pickup-under-test (PUT ...
Electric guitar pickups rely on steel strings interfering ... Funnily enough, this type of pickup will work just fine on both nylon and steel strings, if you were so inclined to try it.
It could potentially be the first time in history that mini-humbuckers have come as standard in a slab-bodied Les Paul Special ...