Sorry to butt in here again -- I've been doing passive eq (compensation) with an active crossover or even better in my opinion a passive line level crossover for a while now. It really works great. Nothing different in designing one. You just leave out the passive crossover and keep the eq and zobel. If your using a big ss or tube amp to drive the drivers you probably should put a cap in for safety (crossover and amp turn on thumps and nasty old DC). My (almost all) drivers get loud with less than a watt (you don't have to pad them down as far when you biamp) so I (carefully) leave the cap out.