In the early 80's, the idea of mounting a humbucker in the stable position on a Stratocaster came up and many people were hooked. In response, EMG put together a set with the SA/SA/81. Since then, we have put together basically every conceivable combination of accessories and they are all available and fully assembled.
As all EMG mics use Quik-Connect, you can reconfigure your system at any time without having to solder.