Alpine CDA-9855, CDA-9853 Recalling the Stored Crossover Settings, About Time Correction, 19-EN

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Recalling the Stored Crossover Settings

1Press and hold MENU for at least 2 seconds.

2Select the Crossover (X-OVER) mode by sliding your finger on the GlideTouch bar to the left or right. Press the GlideTouch bar under the Crossover (X-Over) mode.

3Press FUNC. or the GlideTouch bar to activate the preset mode.

4Select any one of the preset numbers (1 through 6) by sliding your finger on the GlideTouch bar to the left or right. Press the GlideTouch bar under the desired preset to recall the stored contents.

5Press and hold MENU for at least 2 seconds to return to normal mode.

If MENU is pressed while adjusting or setting the itmes in the MENU mode, the unit will return to the previous selection secreen.

By pressing the GlideTouch bar under RETURN in the MENU mode, the unit will return to the normal mode.

About Time Correction

The distance between the listener and the speakers in a car vary widely due to the complex speaker placement. This difference in the distances from the speakers to the listener creates a shift in the sounds image and frequency characteristics. This is caused by the time delay between the sound reaching the listener’s right versus the left ear.

To correct this, the CDA-9855/CDA-9853 is able to delay the audio signal to the speakers closest to the listener. This effectively creates a perception of increased distance for those speakers. The listener can be placed at an equal distance between the left and right speakers for optimum staging.

The adjustment will be made for each speaker in 0.1 ms steps.

Example 1. Listening Position: Front Left Seat

Adjust the time correction level of the front left speaker to a high value and the rear right to zero or a low value.

5.1ms

0.5m

2.25m

The sound is not balanced because the distance between the listening position and the various speakers is different.

The difference in distance between the front left speaker and the rear right speaker is 1.75 m (68-7/8").

Here we calculate the time correction value for the front left speaker in the diagram on the above.

Conditions:

Farthest Speaker – listening position : 2.25 m (88-9/16")

Front left speaker – listening position : 0.5 m (19-11/16")

Calculation: L = 2.25 m – 0.5 m = 1.75 m (68-7/8") Time correction = 1.75 ÷ 343*1 1000 = 5.1 (ms)

*1 Speed of sound: 343 m/s (765 mph) at 20˚C

In other words, giving the front left speaker a time correction value of 5.1 ms makes it seem as if its distance from the listener is the same as the distance to the farthest speaker.

Time correction eliminates the differences in the time required for the sound to reach the listening position.

The time of the front left speaker is corrected by 5.1 ms so that its sound reaches the listening position at the same time as the sound of other speakers.

Example 2. Listening Position: All Seats

Adjust the time correction level of each speaker to almost the same level.

1Sit in the listening position (driver’s seat, etc.) and measure the distance (in meters) between your head and the various speakers.

2Calculate the difference between the distance to the farthest speaker and the other speakers.

L = (distance to farthest speaker) – (distance to other speakers)

3Divide the distances calculated for the speakers by the speed of sound (343 m/s (765 mph) at 20˚C). These values are the time correction values for the different speakers.

Continued

19-EN

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Contents CDA-9855 CDA-9853 Contents Installation and Connections Operating Instructions Never Attempt the Following On handling Compact Discs CD/CD-R/CD-RW Move your finger on the GlideTouch bar to the left or right About the GlideTouch Bar OperationTouch or press the desired position on the GlideTouch bar Turning Power On and Off Setting Time CDA-9853 onlyPress SOURCE/POWER to turn on the unit Getting StartedAdjusting Volume Display Tilt AdjustmentLowering Volume Quickly Opening and Closing the Movable DisplayManual Storing of Station Presets Automatic Memory of Station PresetsRadio Changing the Radio Frequencies for each CountryTuning to Preset Stations CD / MP3 / WMAStation Title Search Function Freqency Search FunctionPress FUNC. to activate the audio function mode Press the Glide Touch bar under RPT to select the RPT modeRepeat Play 11-ENX. Random Play Scanning ProgramsSearching from CD Text File/Folder Name Search concerning MP3/ WMAFolder Name Search mode File Name Search modeQuick Search About MP3/WMATerminology 14-ENSound Setting Equalizer PresetsSetting Users EQ mode 15-EN16-EN Adjusting and Storing the Parametric Equalizer CurveAdjusting and Storing the Graphic Equalizer Curve Way mode Recalling the Stored Equalizer CurveAbout the Crossover 17-ENAdjusting and Storing the Crossover Settings Press SOURCE/POWER to adjust the slopeAdjust the output level by turning the Rotary encoder WAY SystemRecalling the Stored Crossover Settings About Time CorrectionExample 1. Listening Position Front Left Seat Example 2. Listening Position All SeatsSetting the Time Correction Unit Adjusting and Storing the Time CorrectionDisplay Setup menu is displayed 20-EN21-EN Recalling the Stored Time Correction SettingsSetting the MX Mode Other Functions Displaying the Title/Text22-EN Press TitleAbout the indicator display CDA-9853 only 23-ENAbout Title and Text TitleBlackout Mode On and Off CDA-9855 only Titling Discs/StationsErasing Disc Title/Station Title Displaying TimeSetting Amplifier Link Displaying the External Amplifier InformationIf a Mono Amplifier is Connected If a 4ch Amplifier is Connected26-EN About i-PersonalizeIf you want to use colors other than the above Data downloading starts Data Downloading27-EN General Setting 28-EN29-EN Tuner SettingAudio Setting 30-EN Display SettingDemo Setting Storing Channel Presets SAT Radio Receiver OptionalReceiving Channels with the SAT Radio Receiver Optional Checking the SAT Radio ID NumberReceiving Stored Channels Quick Search FunctionChannel/Category Search Function Changing the DisplaySetting the Auxiliary Data Field Display 33-ENSearching for a desired Song Searching by PlaylistSearching by artist name 34-ENRandom Play Shuffle M.I.X Searching by album name35-EN To search for an album of the selected artistDisplaying the Text 36-ENSong will be played back repeatedly Each press changes the displayChanger Optional Controlling CD Changer OptionalPlaying MP3 Files with the CD Changer Optional Multi-Changer Selection OptionalRemote Control Controls on Remote ControlOperating the Audio Processor 38-ENBattery Replacement InformationCase of Difficulty BasicIndication for CD Player 40-ENIndication for SAT Receiver Mode Indication for CD Changer41-EN Call42-EN SpecificationsIndication for iPod Mode Installation and Connections 43-ENInstallation 44-ENSlide the mounting sleeve into the dashboard RemovalConnections 45-ENAmplifier Link Connector 46-EN47-EN To prevent noise/interference in the audio systemCHA-S634 CHA-1214 CHM-S630Limited Warranty Page Page Page