Front-Panel USB Port: The Sony DSX-A40UI digital
media receiver's front-panel USB (type-A)port can be used for plugging in a USB
Mass Storage Class (MSC) device; such as select Android smartphones (Froyo/Gingerbread
OS only), portable digital audio players, or USB thumbdrives. The head unit can
play music files stored on the USB device in MP3 or WMA formats (up to 320
kbps). The head unit can recognize up to 128 music folders and 512 music files
per folder on a single USB Mass Storage Device. The DSX-A40UI offers the
following USB search, playback, display, and charging functions.
- 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
- 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
- Charging: USB devices that can be charged via USB will be charged when
plugged into the digital media receiver's USB port (1A) and the vehicle's ignition switch
is set to ACC or On.
Note: Not compatible with newer Android smartphones and
tablets which have an operating system of Honeycomb or newer. Not compatible
with USB hubs.
USB 1-Wire iPod/iPhone Control: The DSX-A40UI's front-panel
USB port allows you to connect your iPod/iPhone via the iPod dock or
Lightning connector-to-USB cable that comes with your iPod or iPhone (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 1-bit D/A converter
(bypassing iPod/iPhone DAC), allowing for a Signal-to-Noise ratio up to
- Music Navigation: You can choose to control the
iPod/iPhone from the head unit or from your iPod/iPhone's clickwheel or
touchscreen. The Quick-BrowZer feature allows you to browse your
iPod/iPhone's music library by Artist, Album, Song, Genre, Playlist, or
Podcast from the head unit. The unit also offers Repeat (Track/Album) & Shuffle (Album) playback modes
- 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.
- Charging: While connected and the ignition switch is
set to ACC or ON, the head unit's USB (1A) connection will power and charge your
iPod/iPhone. If your iPod/iPhone has no initial battery charge, then this
unit will not recognize it.
Apple Device Compatibility Chart: The Sony DSX-A40UI is
"Made for iPod/iPhone" compatible and supports the following iPod/iPhone model
features (as of 11/25/2013):
| Apple Device || Generation || Tested Version || Media Type || Control Type || Display Type || Charge |
| Audio || Video || Head Unit || iPod || Artist/Song Text || Track Info |
| iPhone || 2G || 3.1.3 || Y || N || Y || Y || Y || Y || Y |
| 3G || 4.2.1 || Y || N || Y || Y || Y || Y || Y |
| 3GS || 5.1.1 || Y || N || Y || Y || Y || Y || Y |
| 4 || 7.0.4 || Y || N || Y || Y || Y || Y || Y |
| 4S || 7.0.4 || Y || N || Y || Y || Y || Y || Y |
| 5 || 7.0.4 || Y || N || Y || Y || Y || Y || Y |
| 5C || 7.0.4 || Y || N || Y || Y || Y || Y || Y |
| 5S || 7.0.4 || Y || N || Y || Y || Y || Y || Y |
| touch || 1st || 2.2.1 || Y || N || Y || Y || Y || Y || Y |
| 2nd || 4.2.1 || Y || N || Y || Y || Y || Y || Y |
| 3rd || 5.1.1 || Y || N || Y || Y || Y || Y || Y |
| 4th || 6.1.3 || Y || N || Y || Y || Y || Y || Y |
| 5th ||
7.0.4 || Y || N || Y || Y || Y || Y || Y |
| nano || 1st || 1.3.1 || Y || N || Y || N || Y || Y || Y |
| 2nd || 1.1.3 || Y || N || Y || Y || Y || Y || Y |
| 3rd || 1.1.3 || Y || N || Y || Y || Y || Y || Y |
| 4th || 1.0.4 || Y || N || Y || Y || Y || Y || Y |
| 5th || 1.0.2 || Y || N || Y || Y || Y || Y || Y |
| 6th || 1.2 PC || Y || N || Y || Y || Y || Y || Y |
| 7th || 1.02PC || Y || N || Y || Y || Y || Y || Y |
| classic || 80GB || 1.1.2 || Y || N || Y || Y || Y || Y || Y |
| 120GB || 2.0.1 || Y || N || Y || Y || Y || Y || Y |
| 160GB || 2.0.4 || Y || N || Y || Y || Y || Y || Y |
| video || 5th || 1.3 || Y || N || Y || N || Y || Y || Y |
| iPad || 1 || 5.1.1 || Y || N || Y || Y || Y || Y || N |
| 2 || 7.0.4 || Y || N || Y || Y || Y || Y || N |
| 3 || 7.0.4 || Y || N || Y || Y || Y || Y || N |
| 4 || 7.0.4 || Y || N || Y || Y || Y || Y || N |
| mini || 7.0.4 || Y || N || Y || Y || Y || Y || Y |
Air || 7.0.4 || Y || N || 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 Aux 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.
Digital Clarity Tuner: The Sony DSX-A40UI is equipped with a
Digital Clarity Tuner for clear AM/FM stereo sound with digital processing
technology. The Digital Clarity Tuner delivers industry leading signal to
noise ratios, lower interference, better multipath rejection and better stereo
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 DSX-A40UI 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 AM/FM stations.
Dynamic Reality Amp: The redesigned, internal Dynamic Reality Amp
circuitry boasts 47% lower internal resistance compared to conventional
receivers, delivering 55 watts x 4 channel (peak power) to your interior
speakers. This allows you to crank up the volume while maintaining low
distortion, low noise levels and smooth frequency response. Your music isn't
just louder, its clearer too. The power output specs for the DSX-A40UI are as
- Continuous Power Output: 17 watts RMS x 4 channels (at
4 ohms, 20Hz-20kHz, 1% THD-N)
- Peak Power Output: 55 watts x 4-channels (208 total
Note: The power specifications for the Sony DSX-A40UI are
compliant with the CEA-2006 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
EQ3 Stage 2: The Sony DSX-A40UI 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), & High (10 kHz) frequencies from +/-10dB.
Loudness: This features reinforces bass & treble for clear
sound at low volume levels.
2V/2Ch Preamp Output: The Sony
DSX-A40UI is equipped with a 2-volt preamp output
for connecting an external amplifier. The preamp output is full-range and will
fade with the rear speaker channels (it is not switchable).
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 w/ Caution Alarm: The DSX-A40UI features a
detachable face for theft prevention. No face case is included with this unit.
An optional soft face case (142DFC1X,
sold separately) can be purchased for this unit. A face-fixing screw is supplied
for making the face non-detachable, if desired. If you turn the ignition switch
to the Off position without detaching the front-panel, the caution alarm will
sound for a few seconds. The alarm will only sound if the built-in amplifier is
Single-Line LCD w/ Auto Scroll: The easy-to-read single line LCD shows
source information, clock, station ID, and track data when playing back digital
files from your external USB devices. The Auto Scroll
feature allows long displayed items to scroll automatically across the display
when the track is changed on a USB device.
Display 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 DSX-A40UI feature a dimmer mode to dim the
brightness of the display. You can choose from either Dimmer On or Dimmer 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.
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.