Digital Clarity Tuner: The Sony CDX-GT56UI is equipped with a Digital Clarity Tuner for clear
AM/FM stereo sound with digital processing technology.
RDS: The Radio Data System (RDS) feature displays radio
broadcast information such as artist & track information when listening to
compatible AM/FM stations.
Preset Stations: The radio features 5 memory bands to store
and receive AM/FM stations. You can store up to 6 presets each in band (FM 1-3,
Best Tuning Memory (BTM): This feature automatically selects
stations with the best signals within the selected band (FM 1-3), AM 1-2) &
stores them in order of their frequency.
Manual/Seek Tuning: The CDX-GT56UI
allows you to manual tune or seek tune AM/FM stations.
- Manual Tuning: You can
manually tune & find your favorite radio stations one by one.
- Seek Tuning:
You can use the seek button to help you search quickly through the available
Local Mode: In the Local Seek Mode,
the unit will only tune in stations with very strong signals during Seek tuning.
Mono Mode: The Mono Mode allows you improve poor FM reception by
selecting a monaural signal instead of a stereo signal.
SiriusXM Ready: The Sony CDX-GT56UI comes ready for SiriusXM
programming with access to XM and Sirius Satellite Radio stations. Thanks to its
proprietary SiriusXM Connect port, you can add the optional
SXV200V1 SiriusXM Connect tuner and receive more than 150 channels of
exclusive programming directly from SiriusXM, via the "SiriusXM
All Access" package (subscription required). Visit
for a complete list of subscription options and channel guide. Additional features
of the SXV200 SiriusXM Connect tuner include:
- Channel list displays a list of all available channels
- Category Search searches for channels in a certain category
- Displayed Information such as Channel Name, Artist Name, & Song Title
can be viewed on the head unit's LCD
- Up to 18 SiriusXM Satellite Radio station presets
- Channels containing unsuitable content for children can be blocked
Note: A separate SiriusXM Satellite Radio subscription
is required (operates on the XM Network). If you already have a Sirius
Satellite Radio subscription, this radio cannot be added as a discounted
second unit. If you have an existing XM Satellite Radio subscription, you
can add this unit as a discounted second unit.
Disc Compatibility: The unit features a single disc player
that will playback CD-Audio, CD-Text, and finalized CD-R/CD-RW audio discs (12cm
MP3/WMA/AAC Playback: The Sony CDX-GT56UI allows you to
playback CD-Rs or CD-RWs loaded with MP3, WMA, or AAC songs (up to 320 kbps)
recorded in ISO 9660 level 1 or 2, Joliet/Romeo, or Multi-Session. The
CDX-GT56UI can support up 150 folders, and a combined 300 folders & files on a
disc. The head unit will also display song information for MP3, WMA, and AAC
music files (Joliet: up to 32 characters, Romeo: up to 64 characters).
Note: Not all MP3, WMA, AAC files may playback due to
file variations. Copyright protected ACC-LC files cannot be played back.
Compressed Audio Display Information: The CD receiver can
display the following CD-TEXT or ID3/WMA-tag information - Track number, Elapsed
Playing Time, Song Title, Artist Name, or Album Label.
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% increments.
Zappin: With the Zappin feature, you can play music (files
or folders) in 6, 15, or 30-second clips until you find the song you are looking
for on your CD or connected USB device.
Off Insert/Eject: A CD disc can be inserted or ejected with
the power off. The head unit will automatically begin disc playback, when a disc
is inserted with the receiver set to a different source or powered off.
Auto Reload: The CD player will automatically reinsert the
disc if it's ejected, but not removed for 20 seconds or more.
Mounting Angle: For proper CD playback, this unit must be
mounted between 0° (horizontal) and 45°.
USB Port: The receiver's front-panel (type-A) USB port can
be used for plugging in a (MSC) Mass Storage Class or MTP (Media Transfer
Protocol) type USB device. The head unit can play music files stored on the USB
device in MP3, WMA, or AAC formats (up to 320 kbps). The head unit can recognize
up to 128 folders with 500 tracks each when connected to a USB Mass Storage
Device. The CDX-GT56UI offers the following USB search, playback, and display
- Search Modes:
- Quick-BrowZer: allows you to search for a track on
a connected USB device easily by category (Genre, Artist, Album, or
- Jump Mode: gets you closer to the song you want by
allowing you to fast forward through a music category in 10% increments
- Zappin: play music (files or folders) in 6, 15, or
30-second clips until you find the song you are looking for on your
connected USB device
- Playback Modes:
- Repeat: repeat a single track or repeat an entire
- Random: shuffle all tracks or a specific album
- Display Information:
- Numeric Text: track number and elapsed playing time
- Alphanumeric Text: song title, artist name, and
Note: This unit cannot recognize USB devices via a
USB hub. Not all MP3, WMA, AAC files may playback due to file
variations. Copyright protected ACC-LC files cannot be played back.
USB 1-Wire iPod/iPhone Control: The GT56UI's front-panel
USB port allows you to connect your iPod/iPhone via a single cable (iPod dock
connector-to-USB cable; not included with the head unit). This USB 1-Wire for
iPod/iPhone connection lets you directly connect, charge, & control select iPod/iPhones
via the USB jack on the front of the unit, as well as view metadata like song
title & artist name on the front display.
- Bypass iPod DAC: The USB connection allows your
iPod/iPhone's stored music to be loaded instantly to the head unit and sound
quality to be maximized through the head unit's 24-bit D/A converter
(bypassing iPod/iPhone DAC), allowing for a Signal-to-Noise ratio up to
- Information Display: The head unit will display your
iPod/iPhone's music file information, including - Track #, Elapsed playing
time, Song title, Artist name, and Album label.
- Music Navigation: You can choose to control the
iPod/iPhone from the head unit or from your iPod/iPhone's clickwheel or
- Quick-BrowZer: the Quick-BrowZer feature allows you
to browse your iPod/iPhone's music library by Artist, Album, Song,
Genre, Playlist, or Podcast
- Alphabetical Search: search within a specific
Quick-BrowZer category or All tracks alphabetically (A-Z)
- Zappin: with the Zappin feature, you can play music
tracks & albums in 6, 15, or 30-second clips until you find the song you
are looking for on your connected iPod/iPhone
- Repeat & Shuffle Play: Repeat (Track/Album) &
Shuffle (Album) playback modes
- Charging: While connected and the ignition switch is
set to ACC or ON, the head unit's USB connection will power and charge your
iPod/iPhone. If your iPod/iPhone has no initial battery charge,
then this unit will not recognize it.
Note: If you have an iPod nano (7th gen), iPod touch
(5th gen), or iPhone 5; use the Lighting-to-USB cable that came with your
Apple device to connect to the head unit.
iPod/iPhone Compatibility Chart: The Sony CDX-GT56UI is
"Made for iPod/iPhone" compatible and supports the following iPod/iPhone model
features (as of 9/25/2012):
| Apple Device || Generation || Tested Version || Media Type || Control Type || Display Type || Charge |
| Audio || Video || Head Unit || iPod || App mode || Artist/Song Text || Track Info |
| iPhone || 2G || 3.1.3 || Y || N || Y || Y || Y || Y || Y || Y |
| 3G || 4.2.1 || Y || N || Y || Y || Y || Y || Y || Y |
| 3GS || 5.1.1 || Y || N || Y || Y || Y || Y || Y || Y |
| 4 || 6.1 || Y || N || Y || Y || Y || Y || Y || Y |
| 4S || 6.1 || Y || N || Y || Y || Y || Y || Y || Y |
| 5 || 6.1 || Y || N || Y || Y || Y || Y || Y || Y |
| touch || 1st || 2.2.1 || Y || N || Y || Y || N || Y || Y || Y |
| 2nd || 4.2.1 || Y || N || Y || Y || N || Y || Y || Y |
| 3rd || 5.1.1 || Y || N || Y || Y || N || Y || Y || Y |
| 4th || 6.1 || Y || N || Y || Y || N || Y || Y || Y |
| 5th || 6.1 || Y || N || Y || Y || N || Y || Y || Y |
| nano || 1st || 1.3.1 || Y || N || Y || N || N || Y || Y || Y |
| 2nd || 1.1.3 || Y || N || Y || Y || N || Y || Y || Y |
| 3rd || 1.1.3 || Y || N || Y || Y || N || Y || Y || Y |
| 4th || 1.0.4 || Y || N || Y || Y || N || Y || Y || Y |
| 5th || 1.0.2 || Y || N || Y || Y || N || Y || Y || Y |
| 6th || 1.2PC || Y || N || Y || Y || N || Y || Y || Y |
| 7th || 1.02 PC || Y || N || Y || Y || N || Y || Y || Y |
| classic || 80GB || 1.1.2 || Y || N || Y || Y || N || Y || Y || Y |
| 120GB || 2.0.1 || Y || N || Y || Y || N || Y || Y || Y |
| 160GB || 2.0.4 || Y || N || Y || Y || N || Y || Y || Y |
| video || 5th || 1.3 || Y || N || Y || N || N || Y || Y || Y |
| iPad || 1 || 5.1.1 || Y || N || Y || Y || Y || Y || Y || N |
| 2 || 6.1 || Y || N || Y || Y || Y || Y || Y || N |
| 3 || 6.1 || Y || N || Y || Y || Y || Y || Y || N |
| 4 || 6.1 || Y || N || Y || Y || Y || Y || Y || N |
| mini || 6.1 || Y || N || Y || Y || Y || Y || Y || N |
Note: Apple iPod/iPhone software updates may change
functionality results. If you download a newer software version, you may
need to reset the head unit and your iPod/iPhone to regain functionality. If
this doesn't work, you may need to wait until a newer software update is
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.
True Fidelity Sound Construction: The Sony CDX-GT56UI AM/FM compact disc player features a newly developed
sound processor for less distortion, an S-MOSFET IC for smooth signal
transmission, and a large-sized high power capacitor for deep bass sound.
Dynamic Reality Amp: The CDX-GT56UI is equipped with Sony's Dynamic
Reality Amp to produce 3 dimensional sound staging for more realistic sound
inside your vehicle.
CEA2006 Compliant Amplifier: The power specifications for
the Sony CDX-GT56UI 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-GT56UI 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)
Switchable Rear/Subwoofer 2V Preamp Output: The Sony CDX-GT56UI is equipped with a switchable rear/subwoofer 2-volt
preamp output for connecting a full-range or subwoofer amplifier.
Subwoofer Controls: When the unit's subwoofer output is
activated, the preamp output becomes non-fading & a low pass filter is activated
with a selectable cut-off frequency of 50Hz, 60Hz, 80Hz, 100Hz, 120Hz, or Off.
You can also adjust the slope (1/2/3) of the low-pass crossover. You can adjust
the subwoofer preamp output's volume level independently from the head unit's
volume control from -10 to +10 in 1dB increments. In addition, you can select
the phase of the subwoofer output from Normal or Reverse.
High-Pass Filter: The front & rear speaker outputs offer a
selectable high-pass crossover frequency of 50Hz, 60Hz, 80Hz, 100Hz, 120Hz, or
Off. You can also adjust the slope (1/2/3) of the high-pass crossover.
Advanced Sound Engine: Sony's Advanced Sound Engine creates
an ideal in-car sound field with digital signal processing. Advanced Sound
Engine contains the following features: EQ7, Listening Position, DM+ Advanced,
Rear Bass Enhancer, & Dynamic Loudness.
- EQ7: You can select an equalizer curve from eight music
types - Xplod, Vocal, Edge, Cruise, Space, Gravity, Custom, or Off (Flat).
The Custom EQ7 mode allows you to make your own equalizer settings. You
can adjust the level (+/-6dB) of seven different frequency bands - Band1
(63Hz), Band2 (160Hz), Band3 (400Hz), Band4 (1kHz), Band5 (2.5khz), Band6
(6.3khz), and Band7 (16.0kHz).
- Listening Position: This unit can change the
localization of sound by delaying the sound output from each speaker to suit
your position, and simulate a natural sound field with the feeling of being
in the center of it wherever you sit in the car. You can choose from Front
Right, Front Left, Front Center, or Off. You can also set the subwoofer
distance of the subwoofer to Near, Normal, or Far
- RBE (Rear Bass Enhancer): RBE enhances the bass sound
by applying the low-pass filter setting to the rear speakers. This function
allows the rear speakers to work as a subwoofer even if there is no
- Dynamic Loudness: Dynamic Loudness refers to
compensating for volume level & signal gain.
- DM+ Advanced: DM+ Advanced improves digitally
compressed sound by restoring high frequencies lost in the compression
process (works only for USB).
Automatic Level Optimizer: Automatic Level Optimizer
analyzes each track's playback level & adjusts the output level to optimize
transitions between tracks & sources.
Beep Tone: The in-dash head unit provides an audible beep to
confirm button operation. This function can be turned On or Off.
Detachable Face: The Sony CDX-GT56UI features
a detachable face for theft prevention. A face-fixing screw is supplied for
making the face non-detachable, if desired. No face case is included with this unit. An
optional soft face case (142DFC1X,
sold separately) can be purchased for this unit.
Caution Alarm: If you turn the ignition switch to the Off position
without detaching the head unit's front-panel, the caution alarm will sound for a
few seconds. The alarm will only sound if the unit's built-in amplifier is used.
1-Line LCD Display: The Sony CDX-GT56UI features a
1-line LCD display for viewing radio & song information.
Motion Display: This feature shows moving patterns 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 Source/Off button once will
switch sources. Pressing and holding the Source/Off button for one second will turn off audio output, but the clock display
and button illumination remain on. To turn the unit off
completely, you must press and hold the Source/Off button for two seconds.
Dimmer: The CDX-GT56UI feature a dimmer mode to dim the
brightness of the display. You can choose from either "Dim On" or Dim Off".
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.
Demo Mode: The head unit's demo mode can be turned On or
Wireless Remote Control: The head unit comes supplied with an
IR wireless remote control (RM-X211) for easy operation. The included wireless
remote allows you to control the basic functions of the Sony head unit
while keeping your eyes on the road.
Steering Wheel Remote Compatibility: The head unit features
an OEM steering wheel remote control input on the rear of the unit that lets you
keep your vehicle's factory radio steering wheel remote controls when used with
steering wheel audio control adapter (sold separately). Please consult
Outfit My Car to see if your vehicle is compatible.