When this system is set to on, the sound coordinate factors(Bass Frequency, Bass quality, Bass extension, and Treblefrequency) appear during the audio control mode.Display and setting:"Kex/ec4/dB (set) ON" : The sound coordinate factors appearand can be adjusted."Kex/ec4/dB (set) OFF" : The sound coordinate factors are notappeared.KEX/ec4/dB (Sound Coordinate system)Function of the KDC-X615Switch the preout between the rear and non-fading. When youswitch to non-fading, you can adjust the volume separately.The factory default is rear preout.Display and setting:"SWPRE Rear" : Rear preout"SWPRE N-Fad" : Non-fading preoutYou cannot use the high-pass filter with non-fading preout.NOTESwitching preoutDisplay and setting:"BLK MASK/BMSK ON" : The display will turn on by using onlythe upper part of the display and theIN indicator (KDC-X615/6015 only)."BLK MASK/BMSK OFF" : The display will turn on by using thewhole part of the display.This function allows you to turn off the lower part of thedisplay if there is too much information in the display.Black MaskYou can turn the movement of graphic display on and off.The initial setting is ON.Display and setting:"Graphic/GRAP ON" : The graphic display works."Graphic/GRAP OFF" : The graphic display does not work.Switching Graphic DisplayFunction of the KDC-X615/KDC-6015You can dim the display.The dimmer function is not available for units if the dimmer wireis not connected.Display and setting:"Dimmer ON" : The dimmer setting is on."Dimmer OFF" : The dimmer setting is off.NOTEDimmerFunction of the KDC-X615/KDC-6015This adjustment permits easy viewing of the display.Display and setting:"Contrast 0" – "Contrast 10"The initial setting value is "5" .NOTEContrast AdjustmentMenu settings— 30 —English