— When a speaker is connected to a poweramp delivering output higher than thespeaker’s maximum input power capabil-ity.! If a microphone for acoustical measurement(sold separately) is not placed in an appropri-ate location, the measurement tone may be-come loud and measurement may take a longtime, resulting in battery drainage. Be sure toplace the microphone in the specified loca-tion.Before operating the Auto EQfunction! Perform Auto EQ in as quiet a place as pos-sible, with the vehicle engine and air condi-tioning switched off. Also, cut power to carphones or cellular phones in the vehicle, orremove them from the vehicle before per-forming Auto EQ. Sounds other than themeasurement tone (surrounding sounds,engine sound, telephones ringing, etc.)may prevent correct measurement of thevehicle’s acoustics.! Be sure to perform Auto EQ using the mi-crophone for acoustical measurement(sold separately). Using another micro-phone may prevent measurement, or resultin incorrect measurement of the vehicle’sacoustics.! To perform Auto EQ, the front speakersmust be connected.! When this product is connected to a poweramp with input level control, Auto EQ maybe impossible if the power amp’s inputlevel is set below the standard level.! When this product is connected to a poweramp with an LPF (low pass filter), turn theLPF off before performing Auto EQ. Also,set the cut-off frequency for the built-in LPFof an active subwoofer to the highest fre-quency.! The distance has been calculated by acomputer to provide optimum delay to en-sure accurate results. Do not change thisvalue.— The reflected sound within the vehicle isstrong and delays occur.— The LPF on active subwoofers or exter-nal amps delay the lower sounds.! If an error occurs during measurement, amessage appears and measurement iscanceled. Check the following before mea-suring the vehicle’s acoustics.— Front speakers (left/right)— Rear speakers (left/right)— Noise— Microphone for acoustical measure-ment (sold separately)— Low batteryPerforming Auto EQp Auto EQ changes the audio settings as fol-lows:— “Auto EQ&TA” is set to “On”.= For details, refer to Using the auto-ad-justed equalizer on page 171.— The fader/balance settings return to thecenter position.= For details, refer to Using balance ad-justment on page 162.— The equalizer curve switches to “Flat”.= For details, refer to Using the equali-zer on page 170.— The front and rear speakers will automa-tically be adjusted to a high pass filtersetting.p Previous settings for Auto EQ will be over-written.p For AVIC-8000NEX and AVIC-7000NEXusersDo not press the h button to open or closethe panel when you are using the micro-phone.CAUTIONDo not turn off the engine while the measure-ment is in progress.En172Chapter32 Audio adjustments
