... Equalizer, Audio Opal, EQ,High-Pass Filter; BSS FCS-966 Graphic Equalizer, Audio Opal, EQ,High-Pass FilterBrief Instrution:BSS Audio provides ... Stage monitors also benefit from the application of a high-pass filter to remove bass signals (e.g. from vocal- ... center detent on 45mm long-throw precision faders * HP Filter - Sweepable high pass filter, frequency adjustable from OUT (flat) up to 250Hz* ...