omnitronic xo 300 active crossoverActive crossover, stereo 3 way operation 3 way stereo operation Variable 24 dB per octave Linkwitz Riley filters Individual output level controls for each frequency range Continuously adjustable crossover frequencies low mid and mid high Individual muting for input signal and each frequency range CD horn EQ for smoother treble selectable Switchable low and mid phase Input level adjustable Balanced XLR inputs and outputs (19") 48. 3 cm rack