HELLO FREAK ,BOUGHT THE lascalas ABOUT 6 MONTHS AGO , the crossovers are the aa type (year of speakers are 1977)no proplem with the speakers (they realy kick butt )just been doing some research on speakers and a lot of people say if you dampon the box's and the horns you will basicaly emprove your speaker sound ? i'm running a 400cx2 fisher preamp and a set of quick silver8417 amps( all tube system )thanks for reply lee1