dbx 2/3/4 crossover

The dbx 234s Stereo 2/3 Way Mono 4-Way Crossover is a dual
channel crossover with all the features you would expect from a
professional product. 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. Everything in the design exudes great precision from the solid
"click" controls to the high quality 1/4" TRS inputs and outputs.