The spacing of the coils also matters because it cancels out certain overtones.
For example, an open E string on a MM spaced humbucker has the overtone at 1550 Hz complete killed, as in 0 db are left. That is highly audible, just try it with a regular bass and an EQ to see how audible that is. If you use a narrower pickup you kill significantly higher frequencies.
Then there are the ultra fat polepieces which re-shape the magnetic field significantly compared to regular ones, not to mention compared to blades.
I don't follow photobucket links in sales ads.
Last edited by uOpt : 08-27-2013 at 04:42 PM.