AF Alternative Frequencies | Boss Audio Systems 648UA guide

2) AF [ALTERNATIVE FREQUENCIES]

When AF switching mode is selected and the state of AF switching mode is displayed by AF segment in display.

Segment off: AF switching mode off.

Segment on: AF switching mode on, and has RDS information.

Segment flashing: AF switching mode on, but RDS information is not received yet.

When AF switching mode is selected, the radio checks the signal strength of AF all the time. The interval of checking time of each AFs depends on the signal strength of current station, from a few minute for strong station to a few seconds for weak station. Every time that new AF is stronger than current station, it switches over to that frequency for very short time, and

NEW FREQUENCY is displayed for 1-2 seconds. Because the mute time of AF switching or checking time is very short, it is almost inaudible in case of normal program.

During FM mode, when AF is on, SEEK, (SCAN), AUTO-MEMORY function can only receive and save RDS program.

20. SD CARD SLOT

When you need to play the file in the SD card, insert the SD card into the SD card slot. The system will change into the SD mode automatically, and then play the first file in the SD.

Note:

When SD card and USB stick are both inserted into their slot or socket, the system will change into the playback mode of the latter one.

INSTALLATION METHOD

This is an anti-theft installation method.

The main unit wears a METAL MOUNTING SLEEVE.

Please connect the wiring, eg, the Power supply, the Speakers and the Antenna according to the requirements of this Instruction Manual, then install the metal mounting sleeve into the car as per the diagram illustrated below.

3) TA SEEK/TA ALARM:

TA SEEK mode: when newly tuned station does not receive TP information for

5 seconds, the radio retunes to next station which has a different PI to the last station, but has the TP information.

When TP information gets lost at the current station for retune time which is set by RETUNE SHORT(60 seconds) or RETUNE LONG(90 seconds), the radio starts to retune to next same PI station. When same PI station does not receive in 1 cyclic search, the radio retunes to next station with TP information. TA ALARM mode: when this mode is selected, any automatic retune mode is not activated. Only double beep sound(ALARM) will be heard.

When newly tuned station does not have TP information for 5 seconds, beeps are sounded.

To raise the anti-skip capability of the unit, please ensure the metal support strap is

connected firmly to the car chassis.

METAL SUPPORT STRAP

DASHBOARD

METAL MOUNTING SLEEVE

To properly fix the metal mounting sleeve, bend the tabs of the sleeve against the DASH BOARD with a screwdriver.

UNIT CHASSIS

PLASTIC TRIM RING

FRONT PANEL

When TP information gets lost at the current station for retune time, the beep sound will be heard.

When newly tuned station has no RDS signal, PI SEEK is suppressed .

To remove the CD player out of the mounting sleeve, insert the two supplied keys into the left and right side slots of the chassis at the same time.

4) PI SOUND/ PI MUTE:

PI SOUND mode: if a car cruises between buildings that could cause reflecting signals, a phenomenon may occur, due to different PI codes being received from the same AF source. when different PI sounds (DIP) are heard occassionally, this will happen for less than 1 second.

PI MUTE mode: under above same situation, a mute sound will be heard for less than1second.

5) RETUNE L / RETUNE S:

The initial time of automatic TA search or PI SEARCH mode is selected. When PI information is not received for retune interval , the radio starts to retune to next same PI station.

When same PI station does not receive 1 cyclic search, the radio goes to last station and waits for 4-5 minutes until PI code is received.

RETUNE L mode: selected as 90 seconds.

RETUNE S mode: selected as 60 seconds.

NOTE

Before installing and operating the CD player, remove the metal mounting sleeve illustrated by the arrows.

Remove the two screws that protect the CD player during transportation before operating the player.

To attach the removable faceplate, insert the right side of the faceplate into the right of the CD player chassis first. Then push the left side

of the faceplate into the chassis until you hear

it “click”.

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648UA specifications

Boss Audio Systems 648UA is a highly regarded car audio system designed for those seeking an impressive sound experience on the road. This model stands out with its combination of functionality, versatility, and cutting-edge technology, making it an ideal choice for both casual listeners and audio enthusiasts.

One of the primary features of the 648UA is its user-friendly interface. The system is equipped with a front USB port and an auxiliary input, allowing users to connect a wide range of devices, including smartphones and MP3 players. This connectivity ensures that you can play your favorite tunes directly from your personal library without any hassle.

The 648UA boasts Bluetooth technology, enabling wireless streaming of music and hands-free calling. This feature not only enhances the overall convenience but also facilitates safe driving by allowing you to take calls without reaching for your phone. The Bluetooth range is robust, ensuring a stable connection even when your device is in a different part of the vehicle.

In terms of audio quality, the Boss Audio Systems 648UA delivers a powerful performance with its built-in amplifier. This amplifier supports 50 watts x 4 max power output, providing clear and dynamic sound across a wide range of frequencies. The adjustable equalizer enables users to customize the audio settings, allowing for a more personalized listening experience that suits various genres of music.

Moreover, the system includes a removable front panel for added security. This feature is crucial for protecting your investment from theft, as the detachable faceplate can be easily removed when the vehicle is parked. Additionally, the LCD display is bright and easy to read, even in direct sunlight, ensuring that you can navigate through your music effortlessly.

Another noteworthy characteristic of the 648UA is its compatibility with various audio formats. It supports MP3, WMA, and WAV files, making it versatile for different audio sources. The device also features a radio tuner capable of receiving AM/FM signals, offering even more listening options.

Overall, the Boss Audio Systems 648UA combines advanced technology with practical features, making it a fantastic option for anyone looking to enhance their in-car audio experience. With its Bluetooth capability, powerful sound output, and ease of use, this car stereo system is sure to satisfy the audio needs of any driver.