Rane DEQ 60L 1/3-Octave Graphic Equalizer Perfect-Q: what you see is what you get No EQ filter interaction Proportional-Q: classic smooth response Independent accelerated-slope 3-band full-cut tone controls Low-cut and high-cut filters Switchable boost/cut or cut-only modes Input and output level controls 8 segment metering for each input and output 2 boost/cut ranges: +/-6dB or +/-12dB Each channel may use A or B channel controls Stereo linking 2 "analog memories" A-curve/B-curve comparison&lt;B For years, graphic equalizers compromised the seemingly unattainable goal of a response that truly matches the slider settings--until Rane designed the DEQ 60L Digital Signal Processing (DSP) allows filter technology not possible with analog designs Rane coined this new technology "Perfect-Q" to describe the world's first true graphic equalizer whose output response precisely matches its front-panel settings Perfect-Q features virtually no band interaction and extremely low ripple between adjacent bands