Flip-Down/Detachable Face: The CDX-GT640UI
features a manual fold-down face which provides a larger display and greater
protection for the player's CD-slot and your CD discs. In addition, the unit
features a detachable face for theft prevention. The radio does not come with a
protective face case.
Motion Display: This feature
shows moving patterns and a spectrum analyzer on the display when turned on.
Auto Scroll: This feature
allows long displayed items to scroll automatically across the display when the
track is changed on a disc.
Illumination/Clock Display: Pressing the Off button once will turn off audio output, but the clock display
and button illumination remain on. This makes the clock display and
face/button illumination "Keyed" instead of "Unit On" only. To turn the unit off
completely, you must press the Off button for two seconds.
Dimmer: To change the brightness of the display you can set the
CDX-GT640UI to one of three dimmer modes - Dimmer Auto (dims the display
automatically when you turn your vehicle's lights on), Dimmer Off (deactivates
the dimmer), and Dimmer On (display always dim).
Contrast: You can adjust the contrast level of the headunit's display
for better day- and night-time viewing. The contrast level is adjustable in 7
Auto Off: When installing in a vehicle without an accessory power wire at the
radio location, you can set the unit to turn off all lighting a
set amount of time after you turn the power off. The Auto Off feature can be set to 30 seconds, 30 minutes,
60 minutes, or No.
Button Illumination: You can change the heaudnit's button illumination
to blue or green to better match your vehicle's interior dash lighting.
True Fidelity Sound Construction: The Sony Xplod CDX-GT640UI FM/AM compact disc player features a newly developed
sound processor for less distortion, an S-MOSFET IC for smooth signal
transmission, and a large-sized capacitor for deep bass sound.
CEA2006 Compliant Amplifier: The power specifications for
the Sony Xplod CDX-GT640UI are compliant with the CEA2006 Mobile Amplifier Power
Testing and Measurement standards from the Consumer Electronics Association (CEA).
These standards were developed as a way to equitably compare power specs from
model to model and between manufacturers. The power output specs for the
CDX-GT640UI are as follows:
- Continuous Power Output: 17 watts RMS x 4 channels (at 4 ohms,
20Hz-20kHz, 1% THD-N)
- Peak Power Output: 52 watts x 4-channels (208 total watts)
Digital Music Plus Advanced: The Sony CDX-GT640UI features Digital
Music Plus Advanced which is an enhancer technology used to reproduce detail and high
frequency sound from compressed audio.
EQ3 Stage 2: The Sony Xplod
CDX-GT640UI features an EQ3 Stage 2 equalizer with 8 preset equalizer curves for
various types of music. You can choose from Xplod, Vocal, Edge, Cruise, Space,
Gravity, Custom, or Off. The Off mode provides a flat response. The Custom
mode allows you to manually adjust the Low (60 Hz), Mid (1 kHz), and
High (10 kHz) frequencies from +/-10dB.
Dynamic Soundstage Organizer (DSO): Sony's Dynamic Soundstage
Organizer uses proprietary circuitry to induce subtle phase shifts, simulating a
sound source that is placed higher than the actual speakers in the vehicle. For
example, when the DSO function is used in a vehicle equipped with speakers
mounted low in the front doors, it creates virtual speakers in the dash to raise
the soundstage. This unit offers three levels of DSO, each with a larger and
higher soundstage. You can store the DSO setting for each source.
Loudness: This features reinforces bass and treble for clear
sound at low volume levels.
Three 2-Volt Preamp Outputs with Adjustable Crossovers: The CDX-GT640UI contains three pairs of
2-volt RCA preamp outputs for the front and rear channels and for subwoofer operation. A built-in LPF (Low Pass Filter) and HPF (High Pass Filter) work to deliver
overall better sound, and the LPF features a phase shift (Normal/Reverse)
function that reduces low-end reverberation. The
subwoofer output is non-fading with a low pass filter and selectable cut-off
frequency of Off, 80, 100, 120, 140, or 160Hz. The subwoofer volume is adjustable from -10 to
+10. The front and rear speakers offer a selectable high-pass crossover
frequency of Off, 80, 100, 120, 140, or 160Hz.
SSIR-EXA AM/FM Tuner with RDS: The Sony CDX-GT640UI
features a built-in SSIR-EXA AM/FM Tuner with RDS. Radio Data System (RDS)
feature displays radio broadcast information such as artist, title, and album
when listening to compatible AM/FM stations. The CDX-GT640UI
allows you to manual tune or seek tune AM/FM stations. In the Local Seek Mode,
the unit will only tune in stations with very strong signals during Seek tuning.
The Mono Mode allows
you improve poor FM reception by selecting a monaural signal instead of a stereo
signal. The radio features 5 memory bands to store and receive AM/FM stations. You can store up to 6
presets each in FM1, FM2, FM3, AM1 and AM2. Other tuner
- Best Tuning Memory (BTM): This feature selects stations with the best signals within the selected
band and stores them in order of their frequency. You can select from FM1, FM2,
FM3, AM1, and AM2.
- Manual Tuning: You can
manually tune and find your favorite radio stations one by one for FM1, FM2,
FM3, AM1, and AM2.
- Auto Tuning: You can use
the seek button to help you search quickly through the available stations
and then choose your own presets from these available stations.
HD Radio Ready: The CDX-GT640UI is compatible with Sony's
optional XT-100HD add-on HD Tuner (158XT100HD, sold separately) through its UniLink Bus
connection. HD Radio technology, where available, offers higher quality sound
than conventional analog broadcasts and receives text data. HD Radio provides FM
broadcasts that are equal to CD sound quality and AM broadcasts that are as good
as analog FM stereo broadcasts. HD Radio also provides a variety of data,
including station name, song title, artist name, album name, etc. Once
connected, all AM and FM broadcasts are received by the XT-100HD. HD appears as
an additional source, with five preset banks; HD1 (FM1), HD2 (FM2), HD3 (FM3),
HD4 (AM1), and HD5 (AM2). In addition to conventional broadcasts, with HD Radio
broadcasting it is possible to choose from up to 8 multicast programs (HD1 to
HD8 and analog). There are also data programs for each program.
Satellite Radio Ready: There are several options for
connecting an optional satellite radio receiver to this head unit:
- SIRIUS Satellite Radio: To receive
SIRIUS Satellite Radio, you can connect the optional SCC1
SiriusConnect Vehicle Tuner and the optional SNYSC1 Sony
interface module (package item number
- XM Satellite Radio: To receive XM Satellite Radio
connect the optional CNP2000UCA XM Tuner and the Sony CNP-SON1 adapter cable
(package item number
700XMSON2, sold separately).
- Portable: A portable satellite radio
can be connected to the head unit via the auxiliary input
or the Sony XA-300 UniLink auxiliary input adapter (item
Note: A subscription is also
required to receive satellite radio programming
from SIRIUS or XM.
Multi-Format Playback: Multi-format playback lets you play
CDs, CD-Rs, or CD-RWs loaded with MP3, WMA, or AAC songs. The headunit also
supports CD Text. Below are the requirements and features for
compressed audio file playback:
- ISO: compatible with the ISO 9660 level 1 / level 2
format, Joliet/Romeo in the expansion format, and Multi Session
- The Maximum number of:
- folders or albums is 150 including root and empty folders (MP3, WMA,
- files or tracks and folders contained in a disc is 300 or less if a
folder/file names contain many characters (MP3, WMA, AAC)
- displayable characters for a folder/file name is 32 (Joliet), or 64
- ID3 Tag: ID3 tag versions 1.0, 1.1, 2.2, 2.3, and 2.4
apply to MP3 only. ID3 tag is 15/30 characters (1.0 and 1.1) or 63/126
characters (2.2, 2.3. and 2.4). WMA tag is 63 characters.
Note: Copyright protected ACC-LC files cannot be played back.
Compressed Audio Display Information: The CD receiver's display can display the following information: Track
number/Elapsed playing time, Disc/Artist Name, Album/Group Number, Album/Group Name, Track
Name, Text Information and Clock.
Quick-BrowZer: The unit's Quick-BrowZer feature allow you to
search for a track on a CD, iPod, or from your connected USB Mass Storage Device easily
by category (Genre, Artist, Album, or Playlist).
Jump Mode: Jump
Mode gets you closer to the song you want by allowing you to fast forward
through a music category in 10 percent increments.
Zappin: With the Zappin feature, you can play music (files
or folders) in 6, 9,
or 30-second clips until you find the song you are looking for on your CD or
connected USB device.
Off Eject: The CD disc can be
ejected with the power off. The CD player will automatically reinsert the
disc if it's ejected but not removed for
20 seconds or more.
For proper CD playback, this unit must be mounted between 0 (horizontal)
and 45 degrees.
Front Panel Auxiliary Input: A front panel stereo 3.5mm mini-jack is provided to allow the connection of a portable
audio source. Just connect your portable digital music player to this unit,
and you can listen to the audio from the portable player through the speakers in
your mobile audio system. The volume level of the auxiliary input is adjustable
from -8 to +18 dB to compensate for any difference between the unit and your
portable device. The aux input can be deactivated in the menu so it do