... , EQ,High-Pass Filter; BSS FCS-966 Graphic Equalizer, Audio Opal, EQ,High-Pass FilterBrief Instrution:BSS ... Audio provides the Opal FCS-966 Constant Q Graphic Equalizer with separate LF and HF contour filters that ... to +18dBu in 8 stepsBSS Audio Opal FCS-966 Graphic Equalizer Specifications:HP filter set to OUT. GAIN, HF, ... , 50/60Hz, 30VA. BSS FCS-966 Graphic Equalizer, Audio Opal, EQ,High-Pass Filter