Activate your X spot – Crossover that is. You can with Marchand Electronics who offer a variety of electronic crossovers. Shown here is the 2-way XM66 [$1'200] which features XLR/RCA i/o and a selectable 4th-order hi/lo-pass filter between 20 and 4'500Hz. A 4-digit display shows the selected value in red, blue or green while each output has its own attenuator. There's also a damping control, a mono summing feature for single subwoofer use, phase inversion and a 20Hz low cut.