The WHARFEDALE's Q230 is a two channel 30 band 1/3 octave graphic equaliser that uses constant Q filters to ensure uniform bandwidth regardless of gain, resulting in transparent adjustments even at high gain levels. This signal processor with a switchable fader range of 6dB to 12dB aids in getting the greatest sound out of rig in any venue circumstance. A swivelable 40Hz-100Hz high pass filter removes undesirable low-end rumble with pinpoint accuracy, boosting total system headroom.