I recently purchased an AVR 250 and am wondering about its internal sub crossover settings. I've been running the bass management frequency sweep (20 hz - 150 hz) on the Digital Video Essentials DVD targetted directly at the subwoofer channel. My sub is passive and has no variable crossover setting. According to the bass management sweep, it rolls off around 145 hz. But no matter what setting I choose for the sub crossover within the AVR 250, my sub continues to roll off at exactly the same point in the sweep. Does this mean that the crossover function in the 250 is not working? If I set the crossover to 60 hz, shouldn't that mean that I hear little or nothing beyond the 60 hz point in the sweep? Or is there something else I should be aware of? Thanks, Jurgen S.