The MB4 range are direct upgrades from the"P Bass" type pickups with 61mm hole spacing fitted to Epiphone Mandobirds.
The MB4L single coil gives a brighter, more balanced tone and string response to compensate for the "weak E" commonly found when guitar based pickups are used. The 5.4k wind is slightly hotter than standard and the neodymium magnets give chord playing increased clarity.
The MB4HC is a 4 wire humbucker with each coil wound to 3.5k which is the typical standard wind.
Although the control cavity is quite a tight fit, there is room for a standard push/pull mini potentiometer which opens up a range of switching options - particularly useful is series/parallel wiring giving a noticeable boost when switching from rhythm to solo.
Adjustable pole pieces give the potential for fine tuning the string balance and to minimise feedback, the MB4s are resin potted. These "half a P Bass" pickups are also ideal for any similarly equipped E-Mando with a string spacing of around 10mm.