By pressing the button hidden behind the upper left part of thefaceplate during forced closing, you can open the faceplate.Follow the directions below to preset the number of times thatthis button needs to be pressed in order to open the faceplate.Display and setting:"OPEN SW 1" – "OPEN SW 3"The initial setting value is "1" .NOTEManual Open Button SettingFunction of the KDC-X915/KDC-X815Adjust the bass boost level of the external amplifier using themain unit.Display and setting:"AMP BASS Flat" : Bass boost level is flat."AMP BASS +6" : Bass boost level is low (+6dB)."AMP BASS +12" : Bass boost level is high (+12dB).As of December 1999, the power amplifiers controllable by themain unit are as follows:KAC-X501F/PS501F/X401M/PS401M/X301T/PS301T/X201T/PS201TNOTEExternal Amp ControlFunction of the KDC-X915The attenuator gain can be switched to either -20 dB or -60 dB.Choose the -60dB setting when using a high-output amplifier.The factory default is -20dB.Display and setting:"ATT LOW" : The attenuator gain level is set at -20dB."ATT HIGH" : The attenuator gain level is set at -60dB.Attenuator Gain SelectionWhen 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 set ON" : The sound coordinate factors appear andcan be adjusted."Kex/ec4 set OFF" : The sound coordinate factors are notappeared.KEX/ec4 (Sound Coordinate system)Menu settings— 38 —English Function of the KDC-X915/KDC-X815The following operation allows separate sound sources tocontrol the output of the front and rear speakers. The Dualzone system can only be switched on or off when the source isset to the AUX mode.Display and setting:"Zone 2 ON" : The dual zone system function is on."Zone 2 OFF" : The dual zone system function is off.• You must purchase the optional KCA-S210A/CA-C1AX/KDC-CPS82/KDC-CX82/KDC-CPS85/KDC-CX85 device before you canuse this function.• You can choose to send the AUX input through the rearchannel, and the unit’s tuner or CD source through the frontchannel.• The Bass, Treble and Loudness adjustments do not affect therear channel.• When the Dual zone system is turned on, the External disccontrol features cannot be used.• When you set the Dual zone system to on while the non-fadingpreout is switched on, the sound of the non-fading preout doesnot be outputted.NOTEDual Zone System