My guitar is fitted with two P-90's (soapbars). Im not too sure technically what they are, i understand they are a big single coil the size of a humbucker, basically they sound half way between a single coil and a humbucker, they have the clarity of a single coil but sound a lot fatter and less twangy with a bit more of the growl associated with humbuckers, they are not too suited for thrash metal but they are excellent for blues and classic rock styles to heavier rock styles. If you like the sound of single coils but want to fatten up your sound without the full on growl of a humbucker then P-90's are the way forward.