But... I need an answer quickly. I am buying a half din EQ which has a crossover switch for 60 or 90 HZ. It doesnt have the option to turn it off. I like to cross at 80 HZ. Could I put it on 60 HZ for the crossover and then 80 HZ on the amp? I know your not supposed to cross the same signal twice at the same frequency but if its at a different frequency I dont know if the same rule applies. The crossover is a clarion EQS746.