I have heard a rack produce DRASTIC effects on what you heard. However, if it isn't doing it in passive mode, it isn't going to do it in active mode. My guess is that something is wrong in the active crossover section. The slopes may not be adjusted correctly, the hinge frequencies not be summed properly, etc... I would check into it, as my experience is that a well set up active crossover / multi-amped system is FAR superior to any passive crossover system. Sean
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