Citronic CX23 2/3 Way Active Crossover. 2-way stereo or 3-way mono active crossover. The CX23 is a 2-way stereo or 3-way mono active crossover designed to split frequencies so that low frequencies are delivered to the amp driving the sub cabinets and mid/top frequencies are delivered to the AMP driving the mid/top frequency cabs. This type of system is more efficient and delivers more accurate sound quality, especially in larger PA systems. 2-way stereo, 3-way mono crossover. Butterworth filters: 18 dB/octave. Continuously adjustable cutoff frequencies. 40Hz ultra-low frequency cut. Inputs and outputs via XLR. Power supply: 115/230Vac selectable 50/60Hz (IEC).