I am planning to build two tower enclosures using 8" B&W speakers. i got 10 8" B&W woofers from my job, we used to service them, since we dont anymore they were given to me. i wanted to know if anyone out there knows where i can find what their frequency range is. there are no markings on them pertaining to their model, except for bass/mid range on the back sticker. i want to fiqure out what kind of crossover they need. ideally i want to use two of these 8" B&W with 2 4" speakers and a tweeter.