The dbx 234xs is a dual channel 2/3 Way/Mono 4-Way crossover with heavy-duty XLR connections. It features Linkwitz-Riley 24dB per octave filters, independent output gain controls for level matching, output phase inversion, 40 Hz low cut filter, and optional mono summing of the low frequency (subwoofer) output. It’s your secret weapon for improved performance from your PA system.The dbx 234xs exhibits extremely low noise as it uses precision filters to separate the audio signal and direct the correct frequency to the correct speaker. The result is cleaner, more defined sound since signal distortion is all but eliminated. Colorful LED indicator lights are easy to read and let you know the status of the process at a glance.Connections are balanced XLR inputs and outputs with crossover.