AK120 II
INSTRUCTION BOOK
User Guide
CONTENTS
Start
_01
Components
AK120 II at a Glance
Power Management
Connections
Firmware Upgrade
02
03
04
06
11
Using the Device
Basic Functions
Home Screen
Notification Bar
MQS Streaming
Music Player
Playlist Management
USB DAC Functionality
Bluetooth
Settings
Wi-Fi
Equalizer
Miscellaneous
Safety Precautions
Troubleshooting
Copyright
Certifications
Specifications
Trademarks
Disclaimers
_02
12
13
14
17
20
27
29
30
32
37
38
_03
41
42
44
44
46
47
47
User Guide
Package
Contents
Contents may be changed without prior notice to
improve the performance or quality of the product.
AK120 II
Leather Case
(with warranty)
& Protective Film
Quick Start Guide
& Warranty Card
Micro-USB cable
microSD Card
Slot Cover
Leather Case & Protective Film : Protect the device and its screen.
Warranty for the Leather Case guarantees the quality of the leather.
Micro-USB cable : Connect the device to a computer
or charge the device.
Quick Start Guide : Basic overview of device functionality.
Warranty card : The warranty card is required for
customer & technical support. Do not misplace the card.
User Guide : The User Guide can be downloaded from the Astell&
Kern website [http://www.astellnkern.com > Support > Download].
microSD card slot cover : The cover is used to protect the microSD
card slot when not in use. It's installed on the device by default.
Start 02
User Guide
AK120 II at
a Glance
The appearance of the product, printed and engraved
information may vary depending on the model.
Earphones / Optical Port
Power
Micro-USB port
Balanced audio pin map
R- R+ L+ L-
Balanced
audio port
Previous/
Rewind
Volume
Play/Pause
Next/Fast
Forward
microSD
card slot
LCD
Touchscreen
Home key
Earphones / Optical port : Output sound to connected
earphones. Music can be played back on an SPDIFcapable external device by using an optical cable.
Power : Turn the screen on and off.
Long Press - Turn the device on and off.
Balanced port : Output sound to earphones or headphones
that support balanced audio connections. Connect to
an external audio device by using both the earphone port
(ground) and balanced audio port (LR) in conjunction.
Micro-USB port : Connect to a computer or recharge the device.
Previous/Rewind : Play the previous song or restart the song.
Long press - Rewind.
Start 03
User Guide
Play/Pause : Play or Pause a song.
Next/Fast Forward : Skip to the next song.
Long press - Fast Forward.
microSD card slot : Insert a microSD card and access its files.
Volume : Control the volume by turning the wheel.
LCD Touchscreen : Display with gesture control.
Home button : Show the Home Screen.
Power
Management
Turn On/Off
1. Long press the [ ] button to turn on/off the device.
2. A long press while the device is on will display a
shutdown message.
3. Press [Confirm] to turn off the device.
This device has an automatic shutdown feature to
reduce battery consumption. The device will turn off after
a defined period when there is no user input. [Settings Power Saving - Automatic Shutdown] (See p. 34)
Turn the Screen On/Off
1. Press the [ ] button to turn on the screen.
2. Another short press will turn off the screen.
This device has an automatic timeout feature to reduce
battery consumption. The screen will turn off after a
defined period when there is no user input. [Settings Power Saving - Screen Timeout] (See p. 34)
Start 04
User Guide
Reset Function
1. In cases of unexpected device failure or freeze, press
the [ ] button for 12 seconds to force a shutdown.
The device can be restarted normally after a shutdown.
Resetting the device will not affect the stored data or
time setting. Do not attempt to reset the device while it's
functioning because doing so may corrupt stored data.
Charging
1. Turn on the computer.
2. The device will charge automatically when connected
to a computer via the Micro-USB cable.
When charging via PC connection, the charge time may
change depending on whether the device is On or Off.
The maximum charge time with a 5V 2A charging adapter is
4 hours and 30 minutes. (Fully discharged battery, power Off)
If the device is On and/or being used while charging, the
charge time may be longer or the battery may not fully
charge. Charging with the device turned Off is recommended.
The device may not charge if the PC or USB connection
goes into standby/sleep mode.
The device may charge slowly or not charge at all in
extreme temperatures. Charging in a room-temperature
setting is recommended.
The built-in battery will gradually lose capacity over time
according to the number of charges/discharges.
Be sure to use a high-powered USB 2.0 port. A lowpowered USB port (i.e. keyboard or USB hub without a
dedicated power supply) will increase the charge time.
Do not use a Micro-USB cable other than the one supplied
with the device because doing so may cause a malfunction.
Start 05
User Guide
Connections
Earphones/Headphones
1. Connect earphones or headphones to the earphones port.
OR
Balanced Earphones/Headphones
1. Connect supported earphones or headphones to the
Balanced port.
OR
Balanced Audio Device
1. Connect to an external audio device by using both the
Earphones port and Balanced port in conjunction.
Earphones port
(Ground)
Balanced port (LR)
Start 06
User Guide
Optical Out
1. Music can be played back on an SPDIF-capable
external audio device by using an optical cable.
DSD format is not supported while using Optical Out.
Connecting to a Computer
1. Turn on the device and the PC.
2. Connect the device to a PC as a standard USB device by
using the supplied Micro-USB cable. [Settings - Connect USB]
USB drive : Transfer files from the PC to the device.
DAC input : Listen to music from the PC on the device.
(See pp. 29)
Mac users need to download and install the MTP program
from the Astell&Kern website. [http://www.astellnkern.com
> Support > Download] For an optimal connection, quit all unnecessary
programs before connecting the device to the computer.
Do not use a Micro-USB cable other than the one supplied
with the device because doing so may cause a malfunction.
Windows XP users require Service Pack 2 and Windows
Media Player 10
to be installed for the computer to recognize the USB device.
Download necessary Service Packs and Windows Media
Player from the Microsoft website. http://www.microsoft.com
Start 07
User Guide
Disconnecting from the Computer
1. Verify that all operations have completed before
attempting to disconnect the device from the computer.
Disconnecting the device from the computer during an
operation (i.e. file transfer) may corrupt data on the
device.
Copy Files/Folders to the Device
1. Select the appropriate files/folders from the computer
and Drag & Drop them into the USB device.
Make sure that the Micro-USB cable is securely
connected.
Removing the Micro-USB cable or turning off the
device/computer during a file transfer may corrupt data
on the device.
File transfer speeds may be affected by the computer
and/or the OS environment.
Start 08
User Guide
Delete Files/Folders on the Device
1. Select the file/folder to delete, right click, and select
[Delete].
2. Select [Yes] in the [Confirm File/Folder Deletion]
window to delete the selected files/folders.
Insert/Remove a microSD Card
1. Refer to the diagram and
gently insert a microSD
card into the microSD
card slot.
2. To safely remove a microSD card,
select [Safely remove SD card]
from the Notification Bar or
select [Unmount SD card] from
[Settings - System Information].
3. Gently press the microSD card
to release it from the slot.
Start 09
User Guide
Recommended microSD Cards
Brand : SanDisk, Transcend
Notes on inserting a microSD card.
- Do not force the microSD card into the slot. Doing so may
cause damage to the device and/or the microSD card.
- Do not repeatedly insert/remove the microSD card.
- If the microSD card is improperly inserted, it may
become immovable or cause damage to the device.
Notes on removing a microSD card.
- Be sure to safely unmount and remove the microSD card
from the device. Not following the proper procedure may
corrupt data and cause serious damage to the system.
- Do not remove the microSD card while it's in use.
Doing so may cause data corruption/deletion,
malfunction, and damage to the microSD card.
Miscellaneous
- If the device is unable to recognize the microSD card and
/or is malfunctioning, format the memory card before use.
(See p. 36)
- Using microSD cards other than the recommended
brands may cause device malfunction.
- A microSD card is not included with this device. Please
purchase separately.
If the device is unable to recognize the microSD card and
/or is malfunctioning, format the memory card before use.
A microSD card is not included with this device. Please
purchase separately.
Start 10
User Guide
Firmware
Upgrade
Wi-Fi Update / OTA (Over-the-Air)
1. Connect to a wireless network.
2. When a new firmware version is found, a Firmware
Update Guide window will display on screen.
3. Select [Update] and choose the items for update.
4. Follow the on-screen instructions and proceed with
the Firmware Upgrade.
Refer to page 37 of the manual for more information on
connecting to a wireless network.
Firmware Upgrade may not initialize when the battery
level is too low (A minimum battery level of 50% is
required). Moving to another screen during the file
download will cancel the download.
Do not disconnect from the wireless network during a
Firmware Upgrade. Doing so may cause data corruption
and/or damage to the system.
If an error occurs or the notice in the Notification Bar
disappears during an upgrade, download the Firmware
Upgrade again through [Settings - Update - System
Update].
Start 11
User Guide
Basic
Functions
LCD Touchscreen
1. This device features an LCD Touchscreen.
Interact with the device by touching the screen to
access a variety of features.
Do not use a sharp object or excessive force to prevent
damage to the screen.
Moving up/down in the list
1. Scroll through a list by dragging [Bottom
[Top Bottom] on the screen.
Top] /
Home Screen
1. Press the [Home] button at any time to return to the
Home Screen.
Home Screen
2. Long press the [Home] button to move to the Music
Player.
Using the Device 12
User Guide
Home
Screen
1
2
3
4
1 Notification Bar Pull down on the Notification Bar to
view its contents. (See pp. 14-16)
2 Current Song
Currently playing artist/song information.
3 Menu items
Select a menu button to
move to the corresponding screen.
4 Search options View the list of songs by different
search options.
Menu items other than [MQS Streaming/Settings] can
be long-pressed and dragged to change their locations.
Using the Device 13
User Guide
Notification
Bar
1
9
2
10
3
11
4
12
5
6
13
7
14
8
Using the Device 14
User Guide
1
Notification
Bar
Press the Notification Bar
to close.
2
Wi-Fi
Press [
or off.
3
Bluetooth
Press [ ] to turn Bluetooth
on or off.
4
Equalizer
Press [
] to turn the EQ on
or off. The most recent EQ
settings are used by default.
5
Gapless
Playback
Press [
] to turn Gapless
Playback on or off.
6
Play Mode
Press [
] to cycle through
different Play Modes.
: Sequential playback.
: Shuffle playback.
7
Repeat
Press [
] to cycle through
different Repeat modes.
: Repeat the entire Playlist.
: Repeat the current song.
: Disable Repeat.
8
Notifications
Display
Notification contents are
displayed in this area.
9
Search
Enter keywords to display
a list of items containing the
search terms.
] to turn Wi-Fi on
Using the Device 15
User Guide
10
Computer
Connection
11
Screen Lock Press [
] to turn the Screen
Lock on or off. The volume
wheel will not function when
the screen is locked.
12
Line Out
Turn Line Out on or off.
13
Balanced
Output
Turn Balanced Output on or off.
14
Brightness
Use the adjustment bar to
control the display brightness.
Long press [
screen.
/
Select the appropriate mode
when connected to a computer.
:USB drive mode for
transferring media files.
:Listen to music from the
PC through the device.
/
] to move to the corresponding
Using the Device 16
User Guide
MQS
Streaming
The AK120 II can access music files stored on a
computer on the same network.
MQS Streaming Server Installation
1. Visit the Astell&Kern website and download the server
installer that corresponds to your operating system.
[http://www.astellnkern.com > Support > Download]
2. Run the downloaded installer and follow the onscreen instructions.
3. Check the User Guide within the program for detailed
information on using the MQS Streaming Server.
Minimum system requirements.
PC
- OS : Windows XP, Windows 7, 8 (32 & 64 bit)
Mac
- Mac OS X Lion (10.7)
Running the MQS Streaming Server
1. Run the MQS Streaming Server
from the computer.
2. Connect the AK120 II to the same
network as the computer and
select [MQS Streaming] from
the Home Screen.
Using the Device 17
User Guide
3. The MQS Streaming Server is
displayed in the list.
4. Selecting the server will connect
automatically and direct the user
to the server Home Screen.
5. Select a search option at the
bottom of the server Home
Screen to display a list of music.
Refer to page 37 of the manual for more information on
connecting to a wireless network.
Using the Device 18
User Guide
MQS Streaming and Download
1. Select a search option from the
server Home Screen to display
a list of music.
2. Select a song to begin streaming.
3. Long press a song to display an
option for downloading the song
to the device.[Download /
Selected Download]
Select the appropriate option to
download songs.
- A message on the Notification
Bar will indicate a completed
download.
Depending on network conditions, song loading may be
slow and streaming may stutter.
Server response may be slow when the server computer
is under a load.
Depending on network conditions and server status, the
AK120 II's performance may be affected when streaming
and downloading simultaneously.
Terminating MQS Streaming or pressing the item being
downloaded within the Notification Bar will stop downloads.
Using the Device 19
User Guide
Music
Player
Selecting Music
1. Select a search option from the Home Screen to
display a list of music.
2. Select a song from the list to begin playback.
Select [Folder] to search by folder.
Continuous Playback: Approximately 10 hours (Basis:
FLAC, 16 bit, 44 kHz, Unbalanced output, Volume 40, EQ
Off, LCD Off)
Supported file formats: FLAC, WAV (8-192 kHz, 8/16/24
bit), WMA (8-320 kbps), MP3(8-320 kbps), OGG, APE
(Normal, Fast, High), AAC, AIFF, ALAC, DFF, DSF
Listening to Music
- Select an album cover from the Home Screen to
begin playback.
- Turn the [Volume Wheel] to adjust the volume.
- Press [ ] during playback to pause and [ ] to resume
playback.
+ Press the [ ] button on the device to pause/resume
playback.
- Press [
/
] during playback for the previous/next
song.
+ Press the [ / ] button on the device for the previous
/next song.
- Long press [
/
] during playback to rewind/fast
forward.
+ Long press the [ / ] button on the device to rewind
/fast forward.
- Press [
] to return to the previous screen.
Using the Device 20
User Guide
- Press the [Home] button on the device to go to the
Home Screen.
- Press [
] to display the current Playlist.
- Long press a song on the Playlist for Playlist options.
+ [Add to Playlist/Remove/Add to end of Playlist/Add
after current song] are available from the Playlist.
- Drag the progress bar to the desired location during
playback.
- Press the Album Cover during playback to show lyrics.
+
: Add current song to Playlist.
+
: Show song information.
Using the Device 21
User Guide
Playlist Screen
1
3
2
1 Current
location
Indicates the current location. Press to
move return to the previous screen.
2 Playlist
Displays the playlist for the current
location. Long press a song to add to
or remove from the playlist.
3 List sorting Select a method for
sorting the playlist.
Using the Device 22
User Guide
Playlist Option
1
2
4
3
1 Add to Playlist Add the selected song to a Playlist.
2 Remove from
Playlist
Remove the selected song from
the Playlist.
3 Add to End
of Playlist
Add the selected song to
the end of the Playlist.
4 Add After
Current Song
Add the selected song after
the song currently playing.
Using the Device 23
User Guide
Music Player Screen
1
7
2
8
3
4
5
6
9
10
11
12
Using the Device 24
User Guide
1
Previous Screen Return to the previous screen.
2
Album Cover
3
Song Progress Song title information.
4
Song Title
File name is displayed when
ID3 metadata is unavailable.
5
Artist
Artist name.
6
Play/Pause
Play or pause the current song.
7
Playlist
Indicates the current playlist.
8
Details
Displays bitrate and sampling
frequency data.
9
Song
Duration
Indicates song duration.
Press to switch from elapsed
time to remaining time.
10
Progress Bar
Indicates song progress.
Drag the indicator to move to
the desired time.
11
Previous/
Rewind
Short press: Previous song.
Long press: Rewind the
current song.
12
Next/Fast
Forward
Short press: Next song.
Long press: Fast forward the
current song.
Displays album covers. Press
the album cover to show lyrics,
add the current song to a playlist,
or view song information.
Indicates the elapsed time.
Using the Device 25
User Guide
2
1
3
1
Add to Playlist
Add current song to a playlist.
2
Lyrics
Lyrics for the current song.
3
Details
Detailed song information.
Using the Device 26
User Guide
Playlist
Management
Create a Playlist
1. Press [Playlists] from the
Home screen to display
a list of playlists.
2. Press [All Playlists], then
press [+ Add].
3. Enter a name for the playlist
and press [Create] to create
a new playlist.
- Long press to [Delete/
Rename] a playlist.
Add a Song to a Playlist
1. Press [All Playlists] to display
a list of playlists.
2. Select a playlist and press
[+ Add] to display a list of songs.
3. Check the box next to the
desired song and press [Add]
to add the song to the selected
playlist.
Using the Device 27
User Guide
Remove a Song from a Playlist
1. Press [All Playlists] to display
a list of playlists.
2. Selected the desired playlist
and press [- Remove].
3. Check the box next to desired
song and press [Remove] to
remove the song from the
selected playlist.
Edit the Playlist Order
1. Long press [
playlist order.
] to edit the
Using the Device 28
User Guide
USB DAC
Functionality
The USB DAC functionality allowed the AK120 II to be
registered as a sound card on the computer.
Music from the computer is played through the device
for an enhanced listening experience.
USB DAC Specifications
- USB DAC Supported OS
+ Windows XP (32 bit) / Windows 7(32 & 64 bit) /
Windows 8 (32 & 64bit)
- USB DAC Support Specifications
+ Supported formats: WAV, FLAC, WMA, MP3, OGG,
APE (Normal, High, Fast), AAC, ALAC, AIFF, DFF, DSF
+ Sampling ate: 44.1kHz - 96kHz
+ Bitrate: 16 bit / 24 bit
- Control the volume with the AK120 II's volume wheel.
Volume control is unavailable when the LCD screen is
Off during USB DAC connection. The Previous, Next,
and Play buttons are unavailable during USB DAC
connection. Playback may stutter when computer
performance is slow or the USB connection is strained
from heavy usage.
There may be issues with audio-to-video synchronization during video playback depending on the sound
quality and operating environment.
Optical output (S/PDIF) is unavailable during USB DAC
connection. Volume cannot be adjusted via the
Windows volume control. The volume wheel on the
device or volume control on the appropriate program
must be used to adjust the volume.
Using the Device 29
User Guide
Bluetooth
Connect a Bluetooth device to listen to music wirelessly.
Turn Bluetooth On/Off
A Bluetooth device must be paired
with the AK120 II prior to use.
Refer to the Bluetooth device's
User Guide for details.
1. Select [ ] from the Home
Screen or select [On/Off] from
[Settings - Bluetooth].
Bluetooth Pairing
1. Select the appropriate Bluetooth device from the list
of available devices.
A Bluetooth device must be paired with the AK120 II prior
to use. Refer to the Bluetooth device's instruction
manual for details.
Terminate Bluetooth Connection
1. Press the connected Bluetooth
device and confirm the message
prompt to disconnect the device.
Using the Device 30
User Guide
Remove Bluetooth Pairing
1. Press the paired device to be
directed to the settings screen.
2. Select 'Remove Pairing' to
complete the process.
Bluetooth Support Specifications
- Profile: A2DP
- Device performance may be affected during Hi-Fi
playback. (48 kHz or lower is recommended)
DSD playback is unavailable with Bluetooth. Do not turn
off the device during a Bluetooth connection.
Power cycle the Bluetooth device in case of malfunction.
Pairing methods may be different for each individual
Bluetooth device. Always refer to the respective
instruction manual for details.
Maintain a distance of 20 cm (8 in) between the AK120 II
and the paired Bluetooth device. Audio quality will
degrade with longer distances, and the pairing may
disconnect at a distance of 2 m (6.5 ft). (Distances may
vary depending on the device and environment)
Crosstalk may occur while using Bluetooth.
For multipoint devices, make the necessary connections
prior to use.
Car audio Bluetooth connections are not supported.
Malfunction, noise, and other undesirable effects may
occur due to the device's battery level and the environment.
- Instances in which signal interference affects data
transmission. (i.e. holding the device while wearing a
Bluetooth device, holding the device while holding
another electronic device, etc.)
- Instances in which the device or Bluetooth headset's
radio transmitters are touching parts of the body.
- Instances in which the transmission strength is
affected by walls, corners, partitions, etc.
- Instances in which devices using the same frequencies cause
interference (i.e. medical devices, microwave ovens, Wi-Fi, etc.)
- Areas with a great deal of interference or where signals
are weak (i.e. elevators, underground, etc.)
Using the Device 31
User Guide
Settings
Set up the device according to the user's needs.
The settings menu may vary depending on the
Firmware version.
Setup
1. Select [Settings] from the Home Screen.
2. Select the desired item.
Wi-Fi
Change wireless network settings and turn Wi-Fi on
or off.
Refer to page 37 of the manual for more information on
connecting to a wireless network.
Bluetooth
Connect a Bluetooth device to listen to music wirelessly.
Refer to page 30 of the manual for more information on
using a Bluetooth connection.
Equalizer
Set the Equalizer according to the user's preferences.
- Pro EQ: EQ Preset recommended by professionals.
- User EQ: Adjust the frequencies according to the
user's preferences.
Using the Device 32
User Guide
Equalizer is not supported during DSD playback.
Using the equalizer may affect device performance.
Refer to pages 38-40 of the manual for more information
on using the Equalizer.
Gapless Playback
Play the next song without any interruptions/silence.
- Gapless playback is only supported between two
files with identical bitrate, sampling rate, and channels.
Line Out
Turn Line Out on or off.
- Enabling Line Out will lock the volume level at
maximum.
Do not use earphones with the Line Out feature enabled.
Doing so may cause permanent hearing loss.
Balanced Output
Turn Balanced Output on or off.
- Balanced Output will take priority when enabled.
- When connecting earphones while Balanced Output
is enabled, the earphone port will be enabled after
turning off Balanced Output from the volume window.
Disconnecting the earphones at this point will
automatically enable Balanced Output.
Using the Device 33
User Guide
Left-Right Balance
Adjust the Left-Right Balance for earphones/
headphones.
Screen Brightness
Adjust screen brightness settings.
Theme
Change the Theme.
Date & Time
Set the current Date, Time, and Region.
Language
Select the displayed Language.
- English, Korean, Japanese, Chinese (Simplified /
Traditional)
Power
Automatic Shutdown: The device will turn off after a
defined period when there is no user input.
Screen Timeout: The screen will turn off after a
defined period when there is no user input.
Sleep Timer: Music playback will stop, and the device
will turn off after a defined period.
Using the Device 34
User Guide
Connect USB
Media Device (USB Drive): Connect to a computer to
transfer media files.
DAC Input: Listen to music from a PC on the device.
Download
Select a folder for downloaded files.
Select a default folder for downloading music during
MQS Streaming. 'Select Folder' will prompt the user to
manually select a folder for each downloaded file.
Update
System Update: Update the system when a new
version is found.
Application Update: Update the default applications
(including the Store) when new versions are found.
System Information
System Information: View model number, firmware version,
and data storage information. The microSD card can
be mounted/dismounted, and data can be deleted.
Formatting the microSD card will delete all data on the
memory card. Be sure to backup any important files
before formatting.
When formatting the microSD card from a computer, be
sure to select the FAT32 system.
Using the Device 35
User Guide
System Restore
Default Settings: Revert all user settings back to their
original settings.
Factory Reset: Delete all user data and restore the
device to its original factory settings.
Using the Device 36
User Guide
Wi-Fi
Connect to a Wireless Network
1. Long press [ ] from the
Notification Bar or select
[Settings - Wi-Fi] to display
a list of Access Points (AP).
2. Select an appropriate AP to
connect to the wireless network.
- Additional information
(encryption key, index, etc.)
may be required depending
on the network settings.
3. Long press the network name
and select [Network Settings]
to edit specific network settings.
Networks requiring browser or other additional certifications are supported.
Using the Device 37
User Guide
Equalizer
Equalizer Setup
1. Long press [EQ] from the
Notification Bar or turn on the
feature from [Settings - Equalizer].
2. Press [Pro] from the drop-down
list and select [Add New].
3. Enter a name for the custom
EQ settings and select [Add].
Using the Device 38
User Guide
4. Adjust the frequencies according
to the user's preferences.
Reset Equalizer
1. Select the desired EQ setting
and select [Reset] to revert the
EQ to its default settings.
Using the Device 39
User Guide
Delete Equalizer
1. Select [Delete] and choose the
desired EQ setting for deletion.
2. Press [Confirm] to complete
process.
Rename Equalizer
1. Select [Rename] and enter
a new name for the EQ setting.
2. Press [Rename] to complete
the process.
Using the Device 40
User Guide
Safety
Precautions
Device
Displaying one image for an extended period may
cause screen burn-in (afterimage).
When a plug is inserted into the earphones, balanced,
or USB port, do not apply any force or shock to the plug.
Do not insert any metal (coins, hairpins, etc.) objects
or flammable debris into the device.
Do not place heavy objects on the device.
In case the device gets wet (rain, water, chemicals,
medicine, cosmetics, sweat, moisture, etc.), do not power
on the device and allow it to dry thoroughly, then contact
to the nearest iriver Customer Support Center.
(Water-damaged devices will be repaired for a fee regardless
of warranty status, but the device may not be repairable.)
Avoid places with excess moisture, dust, or smoke.
Never attempt to repair the device yourself.
Avoid exposing the device to direct sunlight or extreme
temperatures (-5℃ - 40℃ / 23°F - 104°F).
Do not place the device near magnetic objects
(magnets, TV, monitors, speakers, etc.).
Never use chemicals or cleaning products on the device
because doing so may alter the paint and surface coating.
Avoid dropping or exposing the device to any strong
impact (excessive vibration, etc.).
Do not press multiple buttons simultaneously.
Do not disconnect the Micro-USB cable during data transfer.
Use a USB port at the back of the computer for USB
connections. Connecting to a defective or damaged
USB port may damage the device.
Do not insert any foreign objects into the earphones port.
Using poor quality protective films or adhesive stickers
on the screen may cause damage.
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Miscellaneous
Do not use earphones/headphones or operate the
product while operating any type of vehicle. Not only
is it dangerous, it may be illegal in certain regions.
Do not use the product during any physical activity
(driving, walking, hiking, etc.).
Always use in a safe environment to avoid the risk of
an accident.
Always be aware of your surroundings when using
the device while moving.
Avoid using the device during thunderstorms to
reduce the possibility of electric shock.
If you experience ringing in your ears, lower the
volume or stop listening to the device.
Do not listen to music at excessive volumes for extended periods.
Do not use the earphones/headphones at excessive volumes.
Be careful not to get the earphones/headphones
caught in other objects.
Do not sleep with earphones in your ears or leave
them in for extended periods.
To prevent possible hearing damage, do not
listen at high volume levels for long periods.
Troubleshooting
Check for solutions to common problems.
1. The device won't turn on.
The battery may need to be recharged. Charge the
device for at least one hour and try again.
Reset the device and try again.
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User Guide
2. The device will not charge when connected to a
computer via USB cable.
Use a USB port on the back of the computer, and
check that the USB port is functioning properly.
Check the USB cable connections.
3. The computer won't recognize the device or an error
occurs when connected.
Use a USB port on the back of the computer.
Check the USB cable connections.
For Windows XP, verify that Service Pack 2 (or higher)
and Windows Media Player 10 is installed.
Check that the device is connected properly on a
different computer.
4. The screen turns off.
The screen turns off automatically after a defined
period to reduce battery consumption. Set the time
at [Settings - Power Saving - Screen Timeout].
5. The screen is not displaying properly.
Check whether debris is on the screen.
6. There is no sound or there's static.
Verify that the volume isn't set to [0].
Check that the earphones are plugged in properly,
and make sure debris isn't in the port or on the plug.
Verify that the music file is not corrupted.
Verify that the audio settings have been properly
set (balanced, line out, etc.)
7. File will not playback or a specific file causes instability.
The following may occur due to the condition of the file:
- Playback is unstable or difficult.
- The device may not function properly.
- The file may sound different from a computer.
- There may be a difference in the performance of
playback or other functions.
- The file may not be compatible with playback
specifications.
A file conversion or using a different file is recommended.
Miscellaneous 43
User Guide
Copyright
iriver Limited retains the rights to patents, trademarks,
copyright, and other intellectual property rights related
to this manual. No contents of this manual may be copied
or duplicated in any form or by any means without the
prior written consent of iriver Limited. Using or reproducing,
in whole or part, the contents of this document is subject
to penalties. Software, audio, video, and any copyrighted
contents are protected in accordance with copyright laws.
Unauthorized reproduction or distribution of the copyrighted
contents from this product is the legal responsibility of the user.
Companies, organizations, products, people, and events
used in the examples are not based on actual data. It is
not the intention of iriver Limited to correlate any companies,
organizations, products, people, and events with this
manual. It is the responsibility of the user to comply with
applicable copyright laws.
©1999-2014 iriver Limited. All rights reserved.
Certifications
KCC / FCC / CE / TELEC
Class B Device (Communication equipment for residential use):
This is a Class B Device and is registered for EMC
requirements for residential use. This device can be
used not only in residential areas but in all other areas.
FCCID: QDMPPM21
This device complies with Part 15 of the FCC Rules,
Operation is subject to the following two conditions: (1)
this device may not cause harmful interference, and (2)
this device must accept any interference received, including
interference that may cause undesired operation.
Changes or modifications not expressly approved by the
party responsible for compliance could void the user's
authority to operate the equipment.
Miscellaneous 44
User Guide
Body-Worn operation
This device was tested for typical body-worn operations
with the back of the portable music player kept 1cm.
from the body. To maintain compliance requirements,
use only belt-clips, holsters or similar accessories that
maintain a 1cm separation distance between the user’s
Body and the back of the phone, including the antenna.
The use of belt-clips, holsters and similar accessories
should not contain metallic components in its assembly.
The use of accessories that do not satisfy these requirements
may not comply with CE RF exposure requirements,
and should be avoided.
Body-worn accessory exposure conditions
“Specific information must be included in the operating
manuals to enable users to select body-worn accessories
that meet the minimum test separation distance
requirements. Users must be fully informed of the
operating requirements and restrictions, to the extent
that the typical user can easily understand the
information, to acquire the required body-worn
accessories to maintain compliance. Instructions on
how to place and orient a device in body-worn accessories,
in accordance with the test results, should also be
included in the user instructions. All supported bodyworn accessory operating configurations must be clearly
disclosed to users through conspicuous instructions in
the user guide and user manual to ensure unsupported
operations are avoided. All body-worn accessories
containing metallic components must be tested for
compliance and clearly identified in the operating
manual. The instruction must inform users to avoid
using other body-worn accessories containing metallic
components to ensure RF exposure compliance.”
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User Guide
Specifications
General Specifications
PRODUCT NAME AK120 II
Model
PPM21
Body Color
STONE SILVER
Body Material
Aluminum
Display
3.31 inch WVGA (480x800) AMOLED Touch Screen
Supported Audio WAV, FLAC, WMA, MP3, OGG, APE (Normal, High, Fast),
Formats
AAC, ALAC, AIFF, DFF, DSF
Sampling rate
FLAC, WAV, ALAC, AIFF: 8 kHz - 192 kHz (8/16/24 bits per sample)
DSD: DSD64(1 bit 2.8 MHz), DSD128, Stereo
Output Level
Unbalanced 2.1 Vrms/ Balanced 2.3 Vrms (Condition No Load)
DAC
Cirrus Logic CS4398 x 2 (Dual DAC)
Decoding
Support up to 24 bit / 192 kHz Bit-to-Bit Decoding
Input
USB Micro-B input (for charging & data transfer (PC & Mac)) /
Connection Mode: MTP (Media Device)
Outputs
PHONES (3.5 mm )/ Optical Out (3.5 mm) /
Balanced Out (2.5 mm, only 4-pole supported)
Wi-Fi
802.11 b/g/n (2.4GHz)
Bluetooth
v4.0
Dimensions
2.16” (55mm)[W] x 4.64” (118mm)[H] x 0.58” (14.9mm)[D]
Weight
6.24 oz (177g)
Feature Enhancements Firmware upgrade supported (OTA)
Audio Specifications
Frequency
±0.023 dB (Condition: 20 Hz - 20 kHz) Unbalanced & Balanced /
Response
±0.3 dB (Condition: 10 Hz - 70k Hz) Unbalanced & Balanced
S/N
116 dB @ 1 kHz, Unbalanced / 117 dB @ 1 kHz, Balanced
Crosstalk
130 dB @ 1 kHz, Unbalanced / 135 dB @ 1 kHz, Balanced
THD+N
0.0007% @ 1 kHz, Unbalanced / 0.0005% @ 1 kHz, Balanced
IMD SMPTE
0.0004% 800 Hz 10 kHz (4:1) Unbalanced/
0.0003% 800 Hz 10 kHz (4:1) Balanced
Output impedance Balanced out 2.5mm (1ohm) / PHONES 3.5mm (2ohm)
Clock Jitter
50 ps (Typ)
Memory
Built-in Memory
128GB(NAND)
External Memory
microSD (Max. 128 GB) x 1
Battery
Capacity
3,250 mAh 3.7V Li-Polymer Battery
Supported OS
Supported OS
Windows XP, Windows 7,8 (32 & 64 bit)
Mac OS X 10.7
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Trademarks
Windows 2000, Windows XP, Windows Vista, Windows 7,
Windows 8, and Windows Media Player are Trademarks
of Microsoft Corp.
Disclaimers
The manufacturer, importer, and distributor shall not be
liable for damages including accidental and personal
injury due to the improper use or operation of this
product. The information in this user manual was written
based on current product specifications. The manufacturer,
iriver Limited, is currently adding new complementary
features and will continue to apply new technologies in
the future. All standards are subject to change without
prior notice.
There is no warranty against data loss due to the use of
this product.
Miscellaneous 47