Alpine CDA-7897 owner manual Bass Focus, Example 2. Listening Position All Seats

Page 13
For setting another channel (speaker), repeat the steps 2 and 3.

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

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* ⋅ 1000 = 5.1 (ms)

*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 the distance to the front left speaker is the same as the distance to the farthest speaker.

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").

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.

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

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

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

3 Divide 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.

Bass Focus

The time difference between the front-rear/left-right speakers, can be adjusted at the same time. With an initial delay of 0.1 ms for each of the 0 to 99 steps, audible time correction can be done.

1 Press the T.CORR button to select the Bass Focus mode.

→Bass Focus mode → Time correction mode

Normal mode ←

2 Press the BAND button to select the front-rear / left- right speakers.

FL

FR

FL

FR

→ RL

RR

→ RL

RR

Front (left-right)

Left (front-rear)

speakers

 

speakers

 

FL

FR ←

FL

FR ←

RL

RR

RL

RR

Rear (left-right)

Right (front-rear)

speakers

 

speakers

 

3 Turn the Rotary encoder to adjust the front-rear / left- right delay.

4

5 After setting, press and hold the T.CORR button for least 3 seconds to return to the normal mode.

NOTES

•Any manual time correction adjustments will also affect corrections made in Bass Focus.

•Bass Focus mode is automatically canceled if no buttons are pressed within 15 seconds.

Continued

11-EN

Page 12 Page 14
Image 13
Page 12 Page 14
Contents CDA-7998/CDA-7897 CHA-1214CHM-S630 CHA-S634Contents CD Player Operation Remote Control OperationMP3 Operation XM Radio OperationPrecautions Never Attempt the Following Basic Operation Audio Mute Function Setting TimeDisplaying Time CDA-7998 onlyAdjusting and Storing the Equalizer Curve Equalizer Presets→ Flatoff ↔ Pops ↔ Rock ↔ News ← Selecting directlyCrossover About the CrossoverTo store the adjusted contents Adjusting and Storing the CrossoverWAY System CDA-7998Press the T.CORR button to return to the normal mode Recalling the Stored Crossover SettingsAbout the Time Correction Example 1. Listening Position Front Left SeatExample 2. Listening Position All Seats Bass FocusFront left-right Left front-rear Speakers Time Difference Table Example of Steps 2 and 3 SettingSetting the MX Mode Adjusting and Storing the Time CorrectionQuick Searching Function Blackout Mode On and OffDisplaying the Title/Text About Title and TextElapsed Time Display Titling Discs/StationsErasing Disc Title/Station Title Switching the Display ModesSwitching the Tuner Mode Setup OperationChanging Lighting Color Dimmer Control CDA-7897 onlyTurning Mute Mode On/Off Setting the Subwoofer OutputScroll Setting Sound Beep Guide FunctionConnecting to an External Amplifier Setting the AUX Mode V-LinkSetting the Defeat Mode External Interrupt CDA-7897 onlyOpening Message ON/OFF Setting CDA-7998 only Adjusting Display Contrast CDA-7897 onlyDemonstration Setting of Calendar Display Pattern Switching CDA-7998 only Switching the Animation Display type CDA-7998 onlyAutomatic Seek Tuning Manual TuningManual Storing of Station Presets Radio OperationTuning to Preset Stations Automatic Memory of Station PresetsCD Player Operation To customers using CD-R/CD-RWOpening and Closing the Movable display PlaybackFast Forward and Backward Music Sensor SkipRepeat Play On handling Compact Discs CD/CD-R/ CD-RWScanning Programs X. Random PlayControlling CD Changer Optional → M.I.X. → ALL M.I.X. → offMulti-Changer Selection Playing MP3 Files ∗ Only when the CD changer is connectedPlaying MP3 Files with the CD Changer Optional → CD CHANGER∗ → TunerFile Search Selecting FoldersMP3 Operation Setting the Range of MP3 File SelectionPlaying MP3 Data About MP3Terminology XM Radio Operation Storing XM Channel PresetsReceiving XM Channels with the XM Receiver Optional Checking the XM Radio ID NumberCategory Search Receiving Stored XM ChannelsChanging the Display Data Downloading Personalize Operation CDA-7998 onlyAbout i-Personalize MobileHub Link OperationOption Telephone Mode ON/OFFAbout MobileHub Link Incoming CallsCalling Short Mail Operation Controls on Remote Control Remote Control OperationBattery Replacement Recalling Operating the Audio ProcessorSteps MEMORY1Case of Difficulty InformationBasic RadioIndication for CD Changer Indication for CD PlayerIndication for XM Radio Mode SpecificationsPrecautions Installation and ConnectionsRemoval InstallationTo prevent external noise from entering the audio system ConnectionsLow frequency range System whose frequency range is divided betweenPage ALPINE-1 Damage during shipment

CDA-7897 specifications

The Alpine CDA-7897 is a versatile and high-performance CD receiver that appeals to audiophiles and casual listeners alike. Renowned for its rich feature set and exceptional sound quality, the CDA-7897 is designed to enhance the in-car audio experience.

One of the standout features of the CDA-7897 is its direct connectivity options. The unit offers multiple inputs, including a front auxiliary input and USB connectivity for playing digital music files. This allows users to easily connect their smartphones or MP3 players directly to the receiver, ensuring that their favorite tunes are always within reach. The receiver is also compatible with Alpine's full-speed iPod connection, which allows for seamless control and playback of iPod music.

The CDA-7897 boasts impressive sound processing capabilities. Its built-in 24-bit digital-to-analog converter (DAC) offers superior audio clarity and fidelity, ensuring that even the most intricate details in music are faithfully reproduced. Additionally, the unit features extensive tuning options, including a 3-band parametric EQ and adjustable crossover settings, allowing users to customize their audio output to their liking. The included built-in amplifier provides a robust 50 watts per channel, delivering powerful sound that fills the car with rich, dynamic audio.

Another noteworthy aspect of the CDA-7897 is its sleek and user-friendly design. The receiver features a stylish front panel with a detachable faceplate for added security. The intuitive interface allows for easy navigation through menus and options, making it simple for users to adjust settings while on the road.

In terms of expandability, the CDA-7897 offers several options for enhancing your audio system. It includes preamp outputs for additional amplifiers and speakers, allowing users to build a more powerful setup over time. The unit also supports a variety of audio formats, including MP3 and WMA, ensuring playback compatibility across different music libraries.

Overall, the Alpine CDA-7897 is a feature-rich CD receiver that combines high-quality audio performance with modern connectivity options. Its blend of technology, customization, and user-friendly design solidifies its place as a top choice for car audio enthusiasts seeking an engaging listening experience. Whether cruising down the highway or parked at a gathering, the CDA-7897 delivers an impressive audio performance that elevates any journey.
Top Page Image Contents