Behringer Super-X Pro CX2310 Professional High-Precision Stereo 2-Way/Mono 3-Way Crossover with Subwoofer Output Professional stereo 2-way/mono 3-way crossover featuring state-of-the-art Linkwitz-Riley filters with 24 dB/octave Additional subwoofer output with independent Frequency control Absolutely flat summed amplitude response, zero phase difference Individual output Gain controls for all bands Individual output Mute switches for easy band adjustment