The Rane DEQ 60L 1/3-Octave Graphic Equalizer was made to provide a tool you could use to draw the frequency response you wanted on the unit"s front panel. 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. Rane wanted to keep things interesting and flexible--fear not proportional-Q lovers--for each channel of the DEQ 60 is selectable between Perfect-Q or proportional-Q response.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 Analog-controlled DSP XLR, 1/4" TRS, and Euroblock connectors Bypass switch (DSP), bypass relay (power failure) Exceptional RF and magnetic immunity Universal internal switching power supply