The DBX's 530 is a signal processor that provides a unique degree of equalization flexibility in the popular 500 Series format. If you install the dbx 530 parametric EQ in your 500 series rack, you'll find yourself using it on every project, and possibly every track. You have complete parametric control over three bands, which overlap to enable for creative sound-sculpting. Vbizz engineers like the "infinite notch" mode, which turns any band into a notch filter for extreme attenuation of problem frequencies. The "In" switch quickly compares your sculpted sound to the dry source. The dbx 530 module provides a dependable EQ that consistently works well on any source in your 500 series rack.