I recently came across a pair of 15" Eminence speakers that were taken from a set of 80s Crate 3-way PA cabs. According to the code stamped on them, they were manufactured in '87. Apparently, these were the drivers that were fed the lowest frequencies in the 3-way system. Other than the ribbed cones that these have, they look exactly like the Eminence drivers in my '78 Acoustic 408 bass cab. Anyone know whether these would work in a 2x15 shelf ported bass cab?