To be sure, test each individual driver with a 1.5 volt AA battery. A driver's terminal is positive if attaching the positive end of the battery makes the cone move forward.
Tony,
I will send you, by private message (PM), my email address. If you email me, I will send you a pdf of the full write up for the new crossover design, along with a photo and diagram of the board I built, and a parts list with prices as of April 2016.
Richard