Adjust the bass boost level of the external amplifier using themain unit.Display and setting:"AMP Bass Flat" : Bass boost level is flat. (Default setting)"AMP Bass +6" : Bass boost level is low (+6dB)."AMP Bass +12" : Bass boost level is high (+12dB).As of December 2000, the power amplifiers controllable by themain unit are as follows:KAC-X501F/PS501F/X401M/PS401M/X301T/PS301T/X201T/PS201TNOTEExternal Amp ControlDisplay and setting:"Zone 2 ON" : The dual zone system function is on."Zone 2 OFF" : The dual zone system function is off. (Defaultsetting)• You must purchase the optional KCA-S210A/CA-C1AX/KDC-CPS82/KDC-CX82/KDC-CPS85/KDC-CX85/KDC-CPS87/KDC-CX87 device before you can use this function.• You can choose to send the AUX input through the rearchannel, and the unit’s tuner or audio source through the frontchannel.• The Bass, Middle, Treble and Loudness adjustments do notaffect the rear 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.NOTEThe 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.Dual Zone System Toggles on or off the mute control on the built-in amplifier.Turning on this control enhances the preout quality.Display and setting:"Builtin AMP Mute ON" : Built-in Amp Mute is ON."Builtin AMP Mute OFF" : Built-in Amp Mute is OFF. (Defaultsetting)Built-in Amp Mute Control When this system is set to on, the System Q factors (Basscenter frequency, Bass quality factor, Bass extend, Middlecenter frequency, Middle quality factor, and Treble centerfrequency) appear during the audio control mode.Display and setting:"System Q ON" : The System Q factors appear and can beadjusted. (Default setting)"System Q OFF" : The System Q factors are not appeared.System QYou can set the interval during which the open control panelcannot reverse to be hidden. During the period you have set,the faceplate can be removed from the faceplate bracket.Display and setting:"Off Wait" : 0sec / 3sec (Default setting) / 5sec / 10sec / 15sec/ 20sec / 25sec (sec=seconds)Time setting for removing the faceplateMenu settings— 36 —English