In general, the more wire you wind around a stronger magnet, the more the inductive potential rises and hence, so does the output voltage, while the high frequency response decreases. The inductive value of the wire is the filter's corner frequency, acting as a lowpass. The magnetic field strength of the poles determines the overall amount of current, and hence, low end output. That's why Gibson mudbuckers are mudbuckers; they're much stronger and larger pickups than Fender-style pickups.
