The Ashly MQX-2150 is a 15-band graphic equalizer that features 2 channels of fifteen-band 2/3 octave equalization and a switchable high-pass filter in 1RU. MQX Series EQ's use precision filter design and summing circuitry, with each filter exhibiting true constant "Q" response. The center-detented position of each fader acts as an on/off switch for its filter (to minimize any possible degradation to signal noise levels), ensuring absolutely flat response and high signal-to-noise ratios.