BBE MAX-X2 2 Way Stereo Crossover with Full Featured Sonic Maximizer BBE Sonic Maximizer adds clarity and definition Easy to use operation makes setting-up a 2-way system simple and fun 30Hz high pass filter on each channel to minimize infrasonic rumble 30Hz high pass filter on each channel to minimize infrasonic rumble 115dB of dynamic rangemore than any other crossover in its class BBE Sonic Maximizer adds clarity and definition Easy to use operation makes setting-up a 2-way system simple and fun 30Hz high pass filter on each channel to minimize infrasonic rumble 115dB of dynamic range-more than any other crossover in its class