PROFESSIONAL 2/3/4-WAY AUDIO STEREO SOUND PROCESSING CROSSOVER 19" Rack Mount ***BRAND NEW -- NEVER USED*** Very high quality Audio Stereo 2/3/4-Way Crossover professionally distributed sound system and speaker set up MUSYSIC MU-CO4W One Year Limited Manufacturer Warranty in USA The MUSYSIC MU-CO4W is a professional 2/3/4-Way Audio Stereo Sound Processing Crossover. If you are designing a sound stage, setting up your studio or even setting up an indoor or outdoor venue such as a conference room or even your yard or deck, properly sending your sound to the correct speakers is a must do. The MU-CO4W is your answer in setting up a professionally distributed sound system and speaker set up.