The crossover dbx 224XS is a crossover channel with all the features you would expect from a professional product. It features 24w Linkwitz-Riley for each octave filter, independent output control for level suit, output phase inversion, 40 Hz trim filter, and optional mono synthesizer of frequency output low number (subwoofer). Everything in the design has great precision from "click" controls to high-quality 1/4 "TRS inputs and outputs." Crossover DBX 224XS: Features and characteristics - XLR balanced ins and outs - Mode switch for 2-way stereo or 3-way mono operation - Low frequency output (subwoofer) - x10 range switch on both channels - Altitude 40Hz ( low cut) filter both channels - Phase switch on all outputs - Personal level control on all outputs - 24dB for each octave Linkwitz-Riley filter (professional standard) - The Stereo / Mono status LED indicates the mode selected for 2-year dbx® and labor according