Tascam Stereo Receiver US 2x2 User Manual

D01236020D  
US-2x2  
US-4x4  
USB Audio/MIDI Interface  
REFERENCE MANUAL  
Before connecting this unit to a computer, you must download and install dedicated software on the computer.  
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1 – Introduction  
Features  
Conventions used in this manual  
24-bit/96kHz audio interface  
The following conventions are used in this manual.  
Multiple1 analog signals (L/R) can be input simultaneously  
and output to a computer by USB at the same time  
Buttons, connectors and other physical parts of this unit are  
written using a bold font like this: PHONES knob.  
Multiple XLR mic inputs (balanced2) and standard phone  
Information shown on the computer display is written like  
this “OK.  
Additional information is provided as necessary as tips,  
notes and cautions.  
jack inputs (balanced3/unbalanced4)  
Electric guitars and basses, for example, can be connected  
to the standard phone jack inputs when the MIC/LINE INST  
switch is set to INST (instrument input)5  
TIP  
Balanced stereo line6 and headphone7 outputs  
MIDI IN and OUT connectors  
These are tips about how to use the unit.  
Direct monitoring function allows input monitoring with  
low latency  
USB port (USB-B type, USB 2.0 standard)  
Use the included USB cable to connect the unit to a  
computer. To connect to an iOS device, use a Lightning to  
USB Camera Adapter made by Apple Inc.  
NOTE  
These provide additional explanations and describe special  
cases.  
CAUTION  
Failure to follow these instructions could result in injury,  
damage to equipment or lost recording data, for example.  
CAUTION  
When using a US-2x2 that is connected to a computer, it will  
operate using USB bus power.  
However, the power supply will be insufficient when using  
the unit connected to an iOS device by USB, so you will need  
to purchase a separate AC adapter designed for use with  
this unit (TASCAM PS-P520, DC5V). (When using a US-4x4,  
always connect the included AC adapter.)  
A driver is included for use with Windows computers, and a  
Settings panel application is included for use with Macs  
DAW software included (SONAR LE, Cubase LE)  
SONAR LE only supports Windows computers.  
Cubase LE supports both Windows and Mac computers  
Using the TEAC Global Site  
You can download this Reference Manual and the Owner’s  
Manual necessary for this unit from the TEAC Global Site (http://  
teac-global.com/).  
1. Open the TEAC Global Site (http://teac-global.com/).  
2. In the TASCAM Downloads section, click the desired  
language to open the Downloads website page for that  
language.  
NOTE  
If the desired language does not appear, click Other  
1US-2x2: 2 inputs, US-4x4: 4 inputs  
2XLR-3-31 equivalent  
Languages.  
3. Click the product name in the “Search by Model Name”  
section to open the Downloads page for that product.  
US-2x2: 2 inputs, US-4x4: 4 inputs  
The US-2x2 has XLR/TRS combo jacks  
3Standard 6.3mm (1/4") TRS stereo jack  
(MIC/LINE INST switch set to MIC/LINE)  
US-2x2: 2 inputs, US-4x4: 4 inputs  
4Standard 6.3mm (1/4") TRS stereo jack  
(MIC/LINE INST switch set to INST)  
US-2x2/US-4x4: both 2 inputs  
4. Select and download the Owner’s Manual that are needed.  
5Only IN1-IN2 on the US-4x4  
6Standard 6.3mm (1/4") TRS stereo jack  
US-2x2: 2 outputs, US-4x4: 4 outputs  
7Standard 6.3mm (1/4") stereo jack  
US-2x2: 1 output, US-4x4: 2 outputs  
8
Note about computer operation  
If you are unsure about anything related to the basic operation  
of a computer when it is mentioned in an explanation in this  
manual, please refer to the computer operation manual.  
To use this unit with a computer, dedicated software must be  
installed on the computer.  
For details about software installation, see “Installing the  
TASCAM US-2x2/US-4x4  
3
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2 – Names and functions of parts  
Front panel  
1
2
3
4 5  
6
1
2
3
4
5
6
0
w
7
8
9
0
q
w
7
8
q
US-4x4 front panel  
US-2x2 front panel  
Do not supply phantom power to an unbalanced dynamic  
mic.  
Supplying phantom power to some ribbon mics will break  
them. If you are unsure, do not supply phantom power to a  
ribbon mic.  
If you connect this unit to a laptop computer that is running  
on battery power and set the phantom power switch to  
+48V, the computer battery charge will be consumed more  
quickly.  
1SIG indicators  
The SIG indicators light green when signals (of at least −32  
dBFS) are input through the IN1/IN2 jacks (and US-4x4 IN3/  
IN4 jacks).  
2PEAK indicators  
The PEAK indicators light red when signals that are about  
to distort (−1 dBFS or higher) are input through the IN1/IN2  
jacks (and US-4x4 IN3/IN4 jacks).  
3GAIN knobs  
8IN1/IN2 (BALANCED/UNBALANCED) jacks  
Use to adjust the input levels of the IN1/IN2 jacks (and  
These input jacks are XLR/TRS combo jacks on the US-2x2  
and separate XLR and standard TRS jacks on the US-4x4.  
Use the MIC/LINE INST switches on the front of the unit to  
enable balanced line (MIC/LINE) input or unbalanced (INST)  
input for the standard TRS jacks.  
US-4x4 IN3/IN4 jacks).  
Adjust these so that the PEAK indicators do not light red.  
4USB indicator  
This lights when the USB connection is working.  
When directly connecting a guitar, bass or other instrument,  
set the MIC/LINE INST switch to INST.  
5LINE OUT knob  
Use to adjust the output level of the LINE OUT 1-2 jacks.  
9IN3/IN4 (BALANCED) jacks  
6PHONES knob  
These XLR analog mic input and standard line level TRS jacks  
are balanced input jacks.  
Use to adjust the output level of the PHONES jack ( 1 and  
2 jacks on US-4x4).  
NOTE  
CAUTION  
On the US-4x4, the IN1-IN4 (8, 9) inputs each have two  
jacks (XLR and TRS). Do not input signals through both  
jacks of the same input at the same time. If signals are  
input through both at the same time, neither signal will be  
received properly.  
Before connecting headphones, minimize the volume with  
the PHONES knob. Failure to do so might cause sudden loud  
noises, which could harm your hearing or result in other  
trouble.  
7Phantom power switch/indicator  
0MIC/LINE INST switches  
Use this switch to provide +48V phantom power to the IN1/  
Set according to the IN1/IN2 jack input sources.  
IN2 jacks (and US-4x4 IN3/IN4 jacks).  
Set to MIC/LINE when connecting electronic instruments,  
audio devices, mics and similar equipment.  
Set to INST when connecting an electric guitar, electric bass  
or other equipment with high output impedance.  
The indicator lights when the phantom power switch is set  
to +48V.  
CAUTION  
Set the LINE OUT and PHONES knobs to their minimum  
values before changing the phantom power setting.  
Depending on the connected mics, sudden loud noises from  
monitoring equipment could occur, and this could damage  
the equipment or harm hearing.  
The phantom power switch changes the setting for both  
US-2x2 input channels (all four US-4x4 input channels)  
simultaneously.  
Do not connect or disconnect mics when the phantom  
power switch is set to +48V.  
Set the phantom power switch to +48V only when using a  
condenser microphone that requires phantom power.  
Turning phantom power +48V when a dynamic mic or other  
mic that does not require it is connected could damage this  
unit and connected equipment.  
qMONITOR BALANCE knob  
When recording input signals, use this to adjust the  
monitoring balance between the signals from this unit's  
input jacks and from the computer.  
The volume of signals input through this unit's input jacks  
increase the more the MONITOR BALANCE knob is set  
to the left (INPUT) and signals output from the computer  
increase the more this is set to the right (COMPUTER).  
This knob does not affect the recording level of input  
signals.  
TASCAM US-2x2/US-4x4  
4
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2 – Names and functions of parts  
NOTE  
wPHONES jack  
Use this standard stereo phone jack to connect stereo  
headphones( 1 and 2 jacks on US-4x4). Each of these  
jacks outputs the same signal as the LINE OUT 1–2 jacks.  
Use an adapter to connect headphones with a mini plug.  
The same signals are output from both the 1 and 2 jacks  
of the US-4x4.  
Rear panel  
e
r
t
y
i
e
r
t
y
u
US-4x4 rear panel  
US-2x2 rear panel  
eLINE OUT (BALANCED) jacks  
These standard TRS jacks are analog line outputs.  
uDC IN 5V connector (US-2x2 only)  
To use this unit when connected to an iOS device, connect a  
DC5V TASCAM PS-P520 adapter here (sold separately).  
The signals output from the LINE OUT 1–2 jacks (1–4 jacks  
on US-4x4) can be set in the Settings Panel. For details, see  
NOTE  
When using a US-2x2 that is connected to a computer, it will  
receive power from the computer's USB port, so a dedicated  
AC adapter (sold separately) should not be necessary.  
rMIDI OUT connector  
This 5-pin DIN is a standard MIDI output connector.  
This outputs MIDI signals.  
Depending on the computer, however, the USB port might  
not be able to supply enough power to operate the unit.  
In this case, use a dedicated AC adapter (sold separately).  
tMIDI IN connector  
This 5-pin DIN is a standard MIDI input connector.  
Use this to input MIDI signals.  
iDC IN 12V connector (US-4x4 only)  
Connect the included DC12V AC adapter (GPE248-120200-Z)  
here.  
yUSB port  
Use the included USB cable to connect the unit to a  
computer.  
(Supports USB 2.0.)  
CAUTION  
When using a US-2x2 that is connected to a computer, it will  
receive power from the computer's USB port. Depending  
on the computer, the USB port might not be able to supply  
enough power to operate the unit.  
When connected to a USB 3.0 port, it will function in High  
Speed mode equivalent to USB 2.0 (480 Mbps maximum).  
After waking a computer from suspend (sleep) mode, if the  
unit does not operate properly, turn it off and turn it on  
again or disconnect and reconnect the USB cable.  
TASCAM US-2x2/US-4x4  
5
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3 – Installation  
System requirements  
Installing the dedicated software  
For the latest information about supported operating systems,  
visit the TEAC Global Site (http://teac-global.com/).  
To use this unit with a computer, dedicated software must be  
installed on the computer.  
The dedicated software might be updated at any time.  
Download the latest software for the operating system you are  
using from the TEAC Global Site (http://teac-global.com/).  
i To use this unit with a Windows computer, install the  
included driver. When you install the driver, a Settings Panel  
application will be installed at the same time.  
i To use this unit with a Mac, install the Settings Panel appli-  
cation. The standard OS driver will be used.  
i When using this unit with an iOS device, the standard OS  
driver will be used, so there is no need to install dedicated  
software.  
Windows  
8
Supported operating systems  
Windows 8 (including 8.1) 32-bit  
Windows 8 (including 8.1) 64-bit  
Windows 7 32-bit SP1 or later  
Windows 7 64-bit SP1 or later  
(Windows Vista and Windows XP are not supported)  
8
Computer hardware requirements  
CAUTION  
Windows computer with a USB 2.0 port  
Before starting to install software, quit other applications.  
8
CPU/processor speed  
2 GHz or faster dual core processor (x86)  
Installing the dedicated driver for Windows  
8
Memory  
NOTE  
2 GB or more  
Complete installation of the driver on the computer before  
connecting the unit to it with the USB cable.  
CAUTION  
Operation of this unit was confirmed using standard  
computers that meet the above requirements. This does  
not guarantee operation with all computers that meet the  
above requirements. Even computers that meet the same  
system requirements might have processing capabilities  
that differ according to their settings and other operating  
conditions  
If you already connected the unit to the computer using the  
USB cable, and the Found New Hardware Wizard launched,  
close the Wizard and disconnect the USB cable.  
When you install the Windows driver, the Settings Panel is  
also installed at the same time.  
8
Driver installation procedures  
1. Download the latest driver for the operating system you are  
using from the TEAC Global Site (http://teac-global.com/)  
and save it on the computer to be used with the unit.  
2. Uncompress the saved driver (zip file) on the computer  
desktop or another location.  
3. When uncompressed, separate folders are created for 32-bit  
and 64-bit versions. To launch the installer software, double-  
click the “US-2x2_US-4x4_ InstallerXX.exeexe file (“XXis the  
number of bits) that is suitable for the OS being used.  
Mac OS X  
8
Supported operating systems  
OS X Yosemite (10.10 or later)  
OS X Mavericks (10.9.1 or later)  
OS X Mountain Lion (10.8.4 or later)  
8
Computer hardware requirements  
Apple Macintosh computer with a USB 2.0 port  
CAUTION  
8
CPU/processor speed  
If you open a zip file without decompressing it and double-  
click the “US-2x2_US-4x4_Installer.exe” file in the folder that  
opens, installation will not start. Right-click the zip file and  
select “Extract All”, for example, to decompress it and then  
try again.  
2 GHz or faster dual core processor  
8
Memory  
2 GB or more  
4. When a “Security Warningor “User Account Controlscreens  
appear, click the “Runor “Yesbutton.  
5. Next, select the desired language and click the “OKbutton.  
Apple iOS devices  
8
Supported operating systems  
iOS 7 or later  
Supported audio drivers  
Windows: ASIO2.0, WDM, MIDI  
Mac: Core Audio, Core MIDI  
TASCAM US-2x2/US-4x4  
6
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3 – Installation  
6. Click the “Nextbutton when the screen below appears.  
Installing the Mac OS X Settings Panel  
NOTE  
Before starting to install the Settings Panel, quit other appli-  
cations.  
During driver installation a warning message like this might  
appear: “US-2x2_US-4x4 Installer.dmg” can't be opened  
because it was not downloaded from the Mac App Store.  
If a message like this appears, follow the instructions in  
with the installation.  
7. Read the contents of the License Agreement, and select  
“I accept the terms in the license agreementif you agree to  
the terms.  
8
Settings Panel installation procedures  
1. Download the latest software for the operating system you  
are using from the TEAC Global Site (http://teac-global.  
com/) and save it on the computer to be used with the unit.  
Then, click the “Nextbutton.  
2. Double-click “US-2x2_US-4x4 Installer.dmg, which is the  
saved disk image file for the Settings Panel, and double-click  
“US-2x2_US-4x4 Installer.pkginside the folder that opens.  
8. Next, click the “Installbutton to start installation.  
NOTE  
Depending on the computer’s settings, the downloaded zip  
file might not have opened automatically. In this case, open  
the zip file first and then double-click the disk image file.  
3. When the installer starts, click the “Continuebutton.  
9. The following screen appears when installation has  
completed.  
Click the “Finishbutton.  
4. Next, select the desired language and click the “Continue”  
button.  
CAUTION  
After installing the driver software, device driver installation  
will be completed the first time the unit is connected to the  
computer by USB. At this time, Windows will automatically  
search Windows Update, so it might take some time before  
the computer recognizes that the unit is connected. If the  
computer still does not recognize the unit after some time,  
open the software installer screen from the notification  
area at the bottom right of the computer display. Click “Skip  
obtaining driver software from Windows Update.to stop  
the search.  
TASCAM US-2x2/US-4x4  
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3 – Installation  
5. Click the “Read Licensebutton and check the contents  
of the Software License Agreement. If you agree to the  
contents of the license, click “Agree.  
Working with Gatekeeper  
When using Mac OS X, depending on the Gatekeeper security  
function setting, a warning message might appear during  
installation.  
Then, click the “Nextbutton.  
The solution depends on the warning message shown.  
See the following explanations for details.  
i When the Gatekeeper setting is “Allow applications  
downloaded from: the Mac App Store”  
The following security warning might be shown: “US-2x2_  
US-4x4 Installer.dmgcan't be opened because it was not  
downloaded from the Mac App Store."  
6. Next, click the “Installbutton to start installation.  
In this case, click the OK button to close the message. Then,  
control-click (or right-click) the file and click “Open.  
Click the “Openbutton if the following security warning  
message appears: “US-2x2_US-4x4 Installer.dmgcan't be  
opened because it was not downloaded from the Mac App  
Store. Are you sure you want to open it?"  
7. The following screen appears when installation has  
completed.  
Click the “Closebutton.  
This warning message might also appear when the  
Gatekeeper setting is something other than “Allow applica-  
tions downloaded from: the Mac App Store.  
The security warning message “US-2x2_US-4x4 Installer.dmg”  
can't be opened because it was not downloaded from the  
Mac App Store." could appear again, and you might not be  
able to open the file.  
In this case, copy the file from the folder where it is to the  
desktop or another folder, and then open it. Alternatively,  
change the Gatekeeper settings to “Allow applications  
downloaded from: the Mac App Store and identified devel-  
opersand try opening it again.  
i When the Gatekeeper setting is not “Allow applications  
downloaded from: the Mac App Store”  
‘“US-2x2_US-4x4 Installer.dmgis an application downloaded  
from the Internet. Are you sure you want to open it?might  
appear as a security warning message. In this case, click the  
“Openbutton.  
TASCAM US-2x2/US-4x4  
8
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3 – Installation  
Changing the Gatekeeper setting  
4. When the “Remove that Programscreen opens, click the  
“Removebutton.  
The Gatekeeper setting can be changed using the “Allow  
applications downloaded from:item on the “Generalpage  
of the “Security & Privacypane of the System Preferences.  
To change this, you must click the lock icon ( ) at the bottom  
left and enter a password to unlock the settings.  
5. The following screen appears when uninstallation has  
completed.  
Click the “Finishbutton.  
This setting will lock again when you click the “Show All”  
button at the top left of the window to close the open pane  
or when you quit the System Preferences by, for example,  
clicking the round button at the top left corner of the  
window ( ) or typing command-Q.  
CAUTION  
Changing the Gatekeeper settings could result in security  
risks.  
Installing the Mac OS X Settings Panel  
Delete “US-2x2_US-4x4_Settings Panelfrom the Applications  
folder to complete uninstallation.  
If you changed the Gatekeeper setting to decrease security  
(use one of the lower settings), set it back to the original  
setting after updating the software and/or firmware. (When  
installing a firmware update immediately after software, do  
this after installing the firmware update.)  
Uninstalling the dedicated software  
NOTE  
Normally, there is no need to uninstall the dedicated  
software. Follow these procedures if a problem occurs or  
you no longer intend to use the unit with the computer.  
Uninstalling the dedicated driver for  
Windows  
1. Double-click the “US-2x2_US-4x4_Installer.exefile used  
for installation. When a “Security Warningor “User Account  
Controlscreen appears, click the “Runor “Yesbutton.  
2. Next, the Installshield Wizard will launch.  
Click the “Nextbutton.  
3. When the “Program Maintenancescreen opens, select  
“Removeand click the “Nextbutton.  
TASCAM US-2x2/US-4x4  
9
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4 – Preparation  
Changing the outlet plug (US-4x4 only)  
3
Connecting the power  
8
US-4x4  
Connect the power to the US-4x4 as shown below.  
2
5
$
%
* The AC adapter for the US-4x4 includes two types of outlet  
plugs. Attach the type of plug that matches the power  
outlet that you are using.  
4
1
1Move the latch on the AC adapter in the direction of the  
Power outlet  
arrow.  
2Pull off the outlet plug.  
3Replace it with the other outlet plug (A or B).  
DC plug  
GPE248-120200-Z (included)  
4Move the latch on the AC adapter in the direction of the  
arrow again.  
5Attach the outlet plug to the AC adapter.  
This completes changing the outlet plug.  
After changing the outlet plug, confirm that is not loose or  
crooked and that everything is normal before plugging it  
into an outlet  
CAUTION  
8
US-2x2  
Do not use the adapter if there is anything abnormal about  
the plug after changing it. Use when the plug is abnormal  
could cause fire or electric shock. Contact the retailer where  
you purchased the unit or a TEAC service center (on the back  
cover) to request repair.  
Normally, when a US-2x2 is connected to a computer, it will  
operate using USB bus power, so a separate power supply is  
not necessary. However, when using the unit connected to  
an iOS device or when not using USB bus power, a separate  
AC adapter designed for use with this unit (TASCAM  
PS-P520, DC5V) is necessary. In this case, connect the power  
source to the unit as shown below.  
Power outlet  
TASCAM PS-P520  
(sold separately)  
DC plug  
CAUTION  
Always use the AC adapter designed for use with the unit:  
GPE248-120200-Z for the US-4x4 or TASCAM PS-P520 for the  
US-2x2.  
Using a different AC adapter could cause malfunction,  
overheating, fire or other problems.  
TASCAM US-2x2/US-4x4  
10  
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5 – Connections  
Connecting other equipment  
Audio connections  
This is an example of US-4x4 connections.  
Analog audio signals input into this device from mics, guitars,  
keyboards and other audio equipment can be converted into  
digital signals and transmitted to the computer via USB. In  
addition, by connecting speakers (through an amplifier if not  
powered) or headphones to this unit, you can monitor audio  
signals that are input to this unit and output from the computer.  
8
Precautions before making connections  
Carefully read the operation manuals of the devices to be  
connected and then connect them correctly.  
Before making connections, turn this unit and all  
equipment to be connected off (standby).  
If possible, install all connected devices so that they are  
powered from the same AC power supply line. When using  
a power strip or similar device, be sure to use one that  
has high current capacity in order to minimize voltage  
fluctuations in the AC power supply.  
CAUTION  
Before connecting audio equipment, set the GAIN, LINE  
OUT and PHONES knobs to their lowest values. Failure  
to do so could cause sudden loud noises from monitoring  
equipment, and this could damage the equipment or harm  
hearing.  
Microphones  
Dynamic mics  
Connect these to the IN1/IN2 jacks (and US-4x4 IN3/IN4  
jacks) on the front of the unit  
Condenser mics  
Headphones  
Guitar  
When using condenser mics that require phantom power,  
connect them to the IN1/IN2 jacks (and US-4x4 IN3/IN4  
jacks) on the front of the unit, and set the phantom power  
switch to +48V.  
When the phantom power switch is set to +48V, the phantom  
power indicator on the front of the unit lights.  
Vocal mic  
Bass Guitar  
Vocal mic  
CAUTION  
The phantom power switch changes the setting for both  
US-2x2 input channels (all four US-4x4 input channels)  
simultaneously. Do not turn phantom power +48V when  
connecting a mic that does not require phantom power.  
Examples of connections to a US-4x4 (front)  
Do not connect or disconnect mics while phantom power is  
+48V. Doing so could cause a loud noise and might damage  
this unit and connected equipment.  
Set the LINE OUT and PHONES knobs to their minimum  
values before turning phantom power +48V/OFF.  
Depending on the connected mics, sudden loud noises from  
monitoring equipment could occur, and this could damage  
the equipment or harm hearing.  
USB-B plug  
Turning phantom power +48V when a dynamic mic or other  
mic that does not require it is connected could damage this  
unit and connected equipment.  
Supplying phantom power to some ribbon mics will break  
them. If you are unsure, do not supply phantom power to a  
ribbon mic.  
Powered monitor speakers  
with balanced connections  
Powered monitor speakers  
Computer  
Drum machine  
Examples of connections to a US-4x4 (back)  
Guitar  
Computer connections  
When connecting a guitar or bass guitar directly to this unit, use  
the IN1 or IN2 jack on the front of the unit and set the MIC/LINE  
INST switch for that jack to INST.  
Use the included USB cable to connect the unit to a computer  
USB 2.0/3.0 port. When the USB connection is working, the USB  
indicator on the front of the unit lights.  
Electronic instruments and other audio  
equipment  
When connecting an electronic instrument or other audio  
equipment directly to this unit, use the IN1 and IN2 jacks on the  
front of the unit and set their MIC/LINE INST switches to MIC/  
LINE.  
CAUTION  
If you connect this unit to a computer via a USB hub, for  
example, audio signal dropouts, clicking noises and other  
interference could occur due to the influence of other USB  
devices connected to that hub. For this reason, we strongly  
recommend connecting this unit to a separate USB port.  
Connecting USB keyboards and mice, however, to the same  
bus should not be a problem.  
Analog record players  
The output of an analog record player cannot be connected  
directly to this unit. To connect an analog record player to this  
unit, a phono amp and equalizer (or an audio amplifier that has  
phono input jacks) must be connected between them.  
TASCAM US-2x2/US-4x4  
11  
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5 – Connections  
Monitor speakers  
Connecting with iOS devices  
Connect monitor speakers (powered speakers or an amplifier  
and speaker system) to the LINE OUT 1-2 jacks on the back of  
the unit.  
8
US-2x2  
You will need a Lightning to USB Camera Adapter1 and an AC  
Use the LINE OUT knob on the front of the unit to adjust the  
speaker volume.  
adapter2 (sold separately).  
8
US-4x4  
Headphones  
You will need a Lightning to USB Camera Adapter1.  
Connect headphones to the PHONES jack (standard stereo) on  
1You will need to prepare an Apple genuine Lightning to  
USB Camera Adapter (sold separately.  
the front of the unit.  
2DC5V TASCAM PS-P520 AC adapter (sold separately)  
NOTE  
The same signals are output from both the 1 and 2 jacks  
of the US-4x4.  
CAUTION  
Before connecting headphones, minimize the volume with  
the PHONES knob. Failure to do so might cause sudden loud  
noises, which could harm your hearing or result in other  
trouble.  
MIDI connections  
Connect sound modules, keyboards, synthesizers, drum  
machines and other MIDI devices to the unit in the following  
manner.  
i If you want to monitor sound from a MIDI device, connect its  
outputs to this unit's LINE IN or use in external mixer.  
i You can also use the MIDI IN and MIDI OUT connectors  
on the back of the unit to send and receive MIDI timecode  
(MTC). By doing this, you can use an application that  
supports MTC to synchronize a multitrack recorder (MTR) and  
MIDI devices.  
CAUTION  
The MIDI IN and USB indicators might stay lit even after  
the connected computer is shut down. This is because some  
computers continue to provide power through USB cables  
even after being shut down.  
The MIDI IN indicator lights when the unit is receiving MIDI  
data through the MIDI IN connector. If you connect a device  
that sends MIDI active sensing messages, this indicator will  
blink constantly. In order to avoid this, disable MIDI active  
sensing on the connected device.  
When using Windows Media Player, if the “Sound and Audio  
Devices Properties” Control Panel “MIDI music playback  
(default device)” is set to “Microsoft GS Wavetable SW  
Synth”, you will not be able to hear MIDI performances  
through this unit's LINE OUT [BALANCED] or PHONES  
jacks.  
TASCAM US-2x2/US-4x4  
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6 – Using the Settings Panel  
Opening the Settings Panel  
Settings Panel screen  
You can use the Settings Panel to make settings for the various  
functions of the unit.  
Open the Settings Panel in the following manner.  
1
2
3
4
8
Windows OS  
Select the Settings Panel from “All Programsor “All apps”  
5
6
Windows 7  
Start button All Programs q select “TASCAM US-2x2 &  
US-4x4 Settings Panelunder TASCAM and opened the  
Settings Panel.  
Windows Settings Panel screen  
Windows 8  
In Windows 8, right-click the Start screen and click the “All  
apps” button (in Windows 8.1, the â button that appears  
4
5
1
2
at the bottom left of the Start screen) to open the Apps  
screen. On this screen, click the “TASCAM US-2x2 & US-4x4  
Settings Panel” item under “TASCAM” to open the Settings  
Panel.  
6
In Windows 8, select “TASCAM US-2x2 & US-4x4 Settings  
Panelon the Start screen to open the Settings Panel.  
Mac Settings Panel screen  
1Status display area  
This shows the current status of the software.  
NOTE  
In Windows 8.1, the application is not automatically added  
Item displayed  
Driver Ver (Windows)  
Panel Ver (Mac)  
Device  
Meaning  
to the Start screen.  
Open the Settings Panel from the Control Panel.  
Windows 7  
This is the software version.  
This is the name of the  
connected unit.  
1. Click the Start button and select “Control Panelto open  
the Control Panel.  
(“No Deviceis shown when no  
device is connected.)  
This is the firmware version used  
by the connected unit.  
2. If the Control Panel is showing categories, set the “View  
by:item to “Large iconsor “Small icons.  
Firmware Version  
(Nothing is shown when  
no device is connected.)  
Sample Rate  
(Nothing is shown when  
no device is connected.)  
3. Select “TASCAM US-2x2 & US-4x4 Settings Panelto open  
the Settings Panel.  
This shows the sampling  
frequency.  
i The sampling frequency can  
only be set in the Windows  
version.  
Windows 8  
In Windows 8, right-click the Start screen and click the “All apps”  
button (or â button in Windows 8.1) that appears at the bottom  
1.  
right of the screen, and click “Control Panelto open it.  
Use the displayed value  
pull-down menu to select the  
frequency (44.1, 48, 88.2 or  
96 kHz).  
2. If the Control Panel is showing categories, set the “View  
by:item to “Large iconsor “Small icons.  
3. Select “TASCAM US-2x2 & US-4x4 Settings Panelto open  
the Settings Panel.  
2Direct Monitor Settings  
NOTE  
Input 1-2 and Input 3-4 (US-4x4 only)  
In Windows 8, you can also open the Control Panel by  
clicking the Control Panel item in the menu that appears if  
you right-click the bottom left corner of the desktop.  
Set the monitoring signal for the IN1-IN2/IN3-IN4 jacks to  
“Monoor “Stereo.  
o
When set to “Mono”  
8
Mac OS X  
Stereo signals sent to the computer remain unchanged,  
but are output as mono signals from the LINE OUT  
(BALANCED) and PHONES ( 1 and 2 jacks on US-4x4)  
jacks.  
Using the Finder, open the Applications folder and click  
TASCAM US-2x2 & US-4x4 Settings Panelto open the  
Settings Panel.  
In the Audio Devices window of the Audio MIDI Setup  
application, right-click (control-click) “US-2x2or “US-4x4”  
(or click the settings icon when the unit name is selected)  
and click “Configure deviceto open the Settings Panel.  
o
When set to “Stereo”  
Stereo signals sent to the computer remain unchanged,  
and are output as stereo signals from the LINE OUT  
(BALANCED) and PHONES ( 1 and 2 jacks on US-4x4)  
jacks.  
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6 – Using the Settings Panel  
3Buffer Size item (Windows Only)  
The driver for the unit stores the audio input and output  
signals transferred to and from the computer temporarily in  
a buffer.  
This buffer size can be adjusted.  
Smaller buffer sizes result in less audio signal delay (latency),  
but require high-speed processing by the computer.  
If the processing cannot keep up, for example, due to other  
system operations, clicking and popping noises might occur  
and the audio signal might even drop out.  
Increasing the buffer size will stabilize operation and  
suppress negative effects on audio signals, but the delay in  
audio signals sent to the computer will increase.  
You can use the slider on the panel to adjust the buffer size,  
according to the use conditions.  
Use the slider to select fixed values that increase from left to  
right (64, 128, 256, 512, 1024 and 2048 samples).  
4Audio Input items  
Turn input on/off for each channel separately.  
i Turn an input on by putting a check in its checkbox.  
When an input is on, signals on that channel will be  
input.  
i Turn an input off by removing the check from its  
checkbox . When an input is off, signals on that  
channel will not be input.  
5Line Outputs items  
Line Output 1-2  
i Select the signals output from the unit’s LINE OUT 1-2  
and PHONES ( 1 and 2 jacks on US-4x4) jacks.  
Line Output 3-4 (US-4x4 only)  
i Select the signals output from the unit’s LINE OUT 3-4  
jacks.  
Options  
“MONITOR”  
The signals from the channels selected using the  
Audio Input On/Off items and the signals sent from  
the computer by USB are mixed using the MONITOR  
BALANCE knob. This mix is output from the LINE OUT 1-2  
and PHONES jacks.  
NOTE  
Set the MONITOR BALANCE knob all the way to the left  
(INPUT) to monitor only the input channel signals and set it  
all the way to the right (COMPUTER) to monitor only signals  
output from the computer. At other positions, both signals  
will be mixed.  
“Computer 1-2”  
Only the “Computer 1-2signals sent from the computer  
by USB are output from the LINE OUT [BALANCED] and  
PHONES jacks.  
”Computer 3-4 (US-4x4 only)“  
Only the “Computer 3-4signals sent from the computer  
by USB are output from the LINE OUT [BALANCED] and  
PHONES jacks.  
6Auto Power Save On/Off  
When this setting is on, if operating in standalone mode and  
no input signal (above −60 dBFS) has been detected for 30  
minutes, the unit will turn itself off (start standby) automat-  
ically.  
Options  
“ON(default) : The automatic power saving function is on.  
“OFF”  
: The automatic power saving function is off.  
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7 – Standalone Mode  
Overview  
This unit will operate in standalone mode if it is turned on when  
it is not connected to a computer by USB.  
You can use this unit as a mic preamp and to monitor input  
signals.  
This function is convenient when you want to practice an  
instrument without recording, for example.  
However, when using US-2x2 in standalone mode, a TASCAM  
PS-P520 DC5V AC adapter (sold separately), which is designed  
for use with this unit, is necessary.  
Settings in standalone mode  
When operating in standalone mode, input signals pass-through  
the built-in digital mixer and output selector, which are set at  
fixed values, and are output from the output jacks. In addition,  
when operating in standalone mode, the USB indicator will  
blink.  
Settings Panel settings  
The Settings Panel will be set as follows.  
o Direct Monitor Settings Input 1-2 : Mono  
o Direct Monitor Settings Input 3-4 : Mono  
(US-4x4 only)  
o Audio Input On/Off  
: All on  
o Line Outputs 1-2  
: MONITOR  
: MONITOR  
o Line Outputs 3-4  
(US-4x4 only)  
o ERP2 Setting On/Off  
: Current setting retained  
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8 – Application Guide  
In this chapter, we explain how to set some audio applications  
for use with this unit.  
If you still cannot hear sound after making the settings and  
completing the procedures above, restart the computer.  
If you make this setting, sound will be output through  
this unit, but no sound will be output from the computer’s  
speakers or headphone jack.  
DAW software  
8
Windows 7  
7. Quit all applications and open the “Control Panelfrom the  
Start button menu.  
8. Open “Sound.  
SONAR LE and Cubase LE  
Download quickstart guides for the included DAW software  
them for instructions about downloading, installing and making  
settings in these applications.  
NOTE  
If you do not see this item, click “Hardware and Sound”.  
Other DAW software  
When using any other DAW software, consult its operation  
manual.  
9. On the “Playbackpage, right-click “Speakers TASCAM  
US-2x2(or “Speakers TASCAM US-4x4”), and click “Set as  
Default Devicein the pop-up menu that appears.  
Windows Media Player  
When you do this, the green check mark (“4”) appears  
next to “Speakers TASCAM US-2x2(or “Speakers TASCAM  
US-4x4”).  
8
Windows 8  
1. Quit all applications and right-click the Start screen and then  
click the“All appsbutton that is at the bottom right of the  
screen to open the Apps screen.  
NOTE  
In Windows 8.1, click the â button that appears at the bot-  
tom right of the Start screen.  
2. Click “Control Panel.  
3. Click “Hardware and Sound, and then open the “Sound”  
window.  
4. On the “Playbackpage, right-click “Speakers TASCAM  
US-2x2(or “Speakers TASCAM US-4x4”), and click “Set as  
Default Devicein the pop-up menu that appears.  
When you do this, the green check mark (“4”) appears  
next to “Speakers TASCAM US-2x2(or “Speakers TASCAM  
US-4x4”).  
NOTE  
To use this unit as the recording device, open the  
“Recording” page and use Set as Default Device for Line In  
TASCAM US-2x2 (or TASCAM US-4x4)”.  
10. After completing the setting, click the “OKbutton.  
11. Start Windows Media Player, select an audio file and begin  
playback.  
NOTE  
If you change the setting while Windows Media Player is  
running, the software will not recognize that the device has  
been changed. In this case, restart Windows Media Player.  
If you still cannot hear sound after making the settings and  
completing the procedures above, restart the computer.  
If you make this setting, sound will be output through this  
unit, but no sound will be output by the computer’s speakers  
or headphone jack.  
NOTE  
To use this unit as the recording device, open the  
“Recording” page and use Set as Default Device for “Line In  
TASCAM US-2x2(or Line In TASCAM US-4x4).  
5. After completing the setting, click the “OKbutton.  
6. Launch Windows Media Player, select an audio file and start  
playback.  
NOTE  
If you change the setting while Windows Media Player is  
running, the software will not recognize that the device has  
been changed. In this case, restart Windows Media Player.  
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8 – Application Guide  
Mac OS X and iTunes  
1. Open the Utilities folder within the “Applications folder,  
and double-click “Audio MIDI Setup. Then open the “Audio  
Deviceswindow.  
2. Click “TASCAM US-2x2 Audio Device(or “TASCAM US-4x4  
Audio Device”) to select it and right-click or control-click it.  
Then, click “Use this device for sound outputin the pop-up  
menu.  
The speaker mark appears next to “TASCAM US-2x2 Audio  
Device(or “TASCAM US-4x4 Audio Device”).  
NOTE  
To use this device as the recording device, select “Use this  
device for sound input” for the TASCAM US-2x2 Audio  
Device” (or TASCAM US-4x4 Audio Device”).  
3. Launch iTunes, select an audio file and start playback.  
TASCAM US-2x2/US-4x4  
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9 – MIDI Implementation Chart  
8
MIDI Implementation Chart  
Function  
Transmit  
Recognize  
Remarks  
When power on  
Settable  
Basic channels  
Thru  
When power on  
Messages  
Altered  
Mode  
Thru  
....................  
Note number  
Velocity  
Range  
Thru  
Thru  
Note on  
Note off  
Polyphonic  
Channel  
Aftertouch  
Thru  
Pitch bend  
Thru  
Thru  
Control change  
Program change  
System exclusive  
Thru  
Thru  
Setting range  
....................  
Position  
System common  
System real-time  
Song select  
Tune  
Thru  
Thru  
Clock  
Command  
Local on/off  
All notes off  
Active sense  
Reset  
Other  
Notes  
Thru  
Mode 1: OMNI ON, POLY Mode 2: OMNI ON, MONO  
: YES  
Mode 3: OMNI OFF, POLY Mode 4: OMNI OFF, MONO : NO  
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10 – Troubleshooting  
Please read this chapter if you are unable to use the unit  
properly even after setting it following the procedures in this  
manual.  
If you are still unable to resolve a problem, please contact  
TASCAM customer support with the following information  
about the operating environment and details about the trouble.  
8
I cannot hear any sound even when audio is played  
back on the computer.  
Confirm that the MONITOR BALANCE knob on the unit is not  
turned all the way to the left (toward INPUT). If that is the case,  
turn the MONITOR BALANCE knob to the right of center.  
In addition, check the status of the unit's connection with the  
computer.  
Moreover, if you make the following settings, sound will be  
output through this unit, but no sound will be output by the  
computer’s speakers or headphone jack.  
8
Operating environment  
Computer manufacturer :  
Model :  
CPU :  
Memory (RAM) :  
Operating system :  
Applications used :  
Antivirus software :  
Wireless LAN use:  
Windows 7/8  
See the “8 – Application Guideon page 16 ”- “Windows 8”  
or “Windows 7instructions in the “Windows Media Player”  
section in this manual, and make settings as necessary for  
the OS.  
Conduct “procedures 1–4 for Windows 8or “procedures 1–3  
for Windows 7to set the default device for playback.  
See the end of this document for contact information.  
Mac OS X  
8
I cannot install the dedicated software.  
1. Quit all applications and open “System Preferencesfrom  
the Apple menu.  
1. Check the operating system  
The operating system being used might not be compatible  
with the software that you are trying to install. Check the  
compatible operating system of the software you are trying  
to install again.  
2. Open “Sound.  
3. On the “Outputtab, select “US-2x2or “US-4x4.  
After completing the setting, restart the computer and  
check the sound of playback. Depending on the application  
that you are using, you might need to make additional  
device settings. In particular, DAW software operate using  
audio engines with settings that are different from the  
OS settings, so confirm the DAW driver settings first after  
installing the dedicated software for this unit.  
2. Stop software running in the background  
Antivirus software and other software that runs in the  
background can prevent installation. Quit software that runs  
in the background and try installation again.  
8
The unit is connected, but the computer does not  
recognize it.  
Please see the manuals for the applications that you are  
using for detailed setting procedures.  
1. Install the dedicated software  
2. Change the USB port  
8
Sound breaks up or there is noise.  
The processing load on the computer causes sound to break up  
and noise to occur.  
Here are some methods to reduce the load on the computer.  
This unit cannot be used with USB 1.1. Use a USB 2.0 or USB  
3.0 port.  
Do not use a USB hub with this unit. Always connect the  
unit directly to a USB port on the computer.  
If the above methods do not resolve the problem, connect  
the unit to a different USB port on the computer.  
1. A wireless LAN and software running in the background,  
including antivirus software, regularly put processing loads  
on the computer, which can cause sound to break up and  
other noise.  
Stop wireless LAN transmission, antivirus software and other  
software running in the background when using this unit.  
2. Set the buffer size (latency) in the audio application that you  
are using or in this unit's Settings Panel to a larger value.  
NOTE  
Consult the maker of the audio application that you are  
using for methods to reduce its load on your computer.  
3. Change the settings of your computer so that they are  
optimal for audio processing.  
Windows 8  
1In Windows 8, right-click the ordinary Start screen (Metro  
user interface screen) and then click “All apps.  
2Right-click “Computerand select “Properties.  
3Click “Advanced system settings.  
4Click “Settingsin the “Performancesection of the  
“Advancedtab of the “System Propertieswindow.  
5In the “Visual Effectstab of the “Performance Options”  
window, select “Adjust for best performance.  
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10 – Troubleshooting  
Windows 7  
a) Turn “Aero” off.  
1Right-click the desktop and select “Personalize.  
2Select a “Basicor “High Contrasttheme.  
b) Performance settings  
1Right-click “Computerand select “Properties.  
2Click “Advanced system settings.  
3Click “Settingsin the “Performancesection of the  
“Advancedtab of the “System Propertieswindow.  
4In the “Visual Effectstab of the “Performance Options”  
window, select “Adjust for best performance.  
Mac OS X  
1Open “System Preferencesfrom the Apple menu, and  
select “Energy Saver.  
2Set “Computer sleepto “Never.  
3Set “Display sleepto “Never.  
NOTE  
Depending on the Mac OS X version and Macintosh  
computer model, this setting might not be available.  
8
SONAR LE support  
Our company does not provide support for SONAR LE.  
Please refer to the SONAR LE help menu for instructions about  
using the application.  
8
Cubase LE support  
Our company does not provide support for Cubase LE. Please  
refer to the Cubase LE help menu for instructions about using  
the application.  
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11 – Specifications  
Analog outputs  
Outputs (LINE OUT (BALANCED))  
US-2x2  
US-4x4  
Audio resolution  
8
Sampling frequencies  
44.1, 48, 88.2, 96 kHz  
Quantization bit depth  
16/24-bit  
: LINE OUT 1-2  
: LINE OUT 1-4  
Connectors  
:
6.3mm (1/4") standard TRS stereo jacks  
(Tip: HOT, Ring: COLD, Sleeve: GND)  
8
Output impedance  
Rated output level  
Maximum output level : +20 dBu (7.75 Vrms)  
: 110 Ω  
: +4 dBu (1.273 Vrms)  
Analog inputs  
Mic inputs (balanced)  
Headphone output (PHONES)  
US-2x2  
: IN 1-2  
Connector  
: 6.3mm (1/4") standard stereo jack  
US-4x4  
Connectors  
: IN 1-4  
: XLR-3-31 equivalent  
(1: GND, 2: HOT, 3: COLD)  
Maximum output  
US-2x2  
:
:
18 mW + 18 mW or higher  
(THD+N 1% or less, into 32 Ω  
load)  
45 mW + 45 mW or higher  
(THD+N 1% or less, into 32 Ω  
load) ( 1 and 2 total)  
Input impedance  
Rated input level  
: 2.2 kΩ  
: −65 dBu (0.0004 Vrms)  
(gain knob at MAX)  
: −8 dBu (0.3090 Vrms)  
(gain knob at MIN)  
US-4x4  
Rated input level  
Control input/output ratings  
Maximum input level : +8 dBu (1.9467 Vrms)  
Gain range : 57 dB  
MIDI IN connector  
Connector  
Format  
: 5-pin DIN  
: standard MIDI  
Instrument inputs (unbalanced)  
IN 1-2  
MIDI OUT connector  
Connector  
(MIC/LINE INST switch set to INST)  
: 5-pin DIN  
Connectors  
: 6.3mm (1/4") standard TS stereo jacks  
Format: standard MIDI  
(Tip: HOT, Sleeve: GND)  
Input impedance  
Rated input level  
: 1 MΩ or more  
: −63 dBV (0.0007 Vrms)  
(gain knob at MAX)  
: −6 dBV (0.5015 Vrms)  
(gain knob at MIN)  
USB  
Connector  
Transfer rate  
: 4-pin USB B-type  
: USB 2.0 High Speed (480 Mbps)  
Rated input level  
Audio performance  
Mic amp EIN (equivalent input noise)  
Maximum input level : +10 dBV (3.162 Vrms)  
Gain range : 57 dB  
−127 dBu or less  
(150Ω termination, gain knob at MAX)  
Line inputs (balanced)  
US-2x2  
Frequency response  
: IN 1-2  
IN1-IN4 q LINE OUT (BALANCED), Headphone (HP) output  
US-4x4  
: IN 1-4  
At 44.1kHz and 48kHz  
(MIC/LINE INST switch set to MIC/LINE)  
20Hz  
20kHz  
20kHz  
At 88.2kHz and 96kHz  
20Hz  
40kHz  
40kHz  
:
:
:
+0dB/−0.3dB (JEITA)  
+0dB/−0.1dB (JEITA)  
+0dB/−0.5dB (HP output, JEITA)  
Connector  
: 6.3mm (1/4") standard TRS stereo jack  
(Tip: HOT, Ring: COLD, Sleeve: GND)  
: 10 kΩ  
: −53 dBu (0.0017 Vrms)  
(gain knob at MAX)  
: +4 dBu (1.228 Vrms)  
(gain knob at MIN)  
Input impedance  
Rated input level  
:
:
:
+0dB/−0.3dB (JEITA)  
+0dB/−0.3dB (JEITA)  
+0dB/−2.0dB (HP output, JEITA)  
Rated input level  
Maximum input level : +20 dBu (7.75 Vrms)  
Gain range : 57 dB  
S/N ratio  
101 dB or higher  
(MIC/LINE input to LINE OUT, gain knob  
at MIN, JEITA)  
Distortion  
0.003% or less  
(MIC/LINE input to LINE OUT, 1kHz  
sine wave, at nominal input level and  
maximum output level, JEITA)  
Crosstalk  
95 dB or more  
(MIC/LINE input to LINE OUT, 1 kHz,  
JEITA)  
TASCAM US-2x2/US-4x4  
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11 – Specifications  
Computer system requirements  
General  
Check the TEAC Global Site (http://teac-global.com/) for the  
latest information about supported operating systems.  
Power  
US-2x2 : Supplied by computer over USB*  
US-4x4 : Dedicated AC adapter  
(GPE248-120200-Z), DC12V  
Windows  
* When using with an iOS device, a separate AC adapter  
designed for use with this unit (TASCAM PS-P520, DC5V) is  
necessary.  
Supported operating systems  
Windows 8 (including 8.1) 32-bit  
Windows 8 (including 8.1) 64-bit  
Windows 7 32-bit SP1 or later  
Power consumption  
US-2x2 : 2.5 W  
Windows 7 64-bit SP1 or later  
US-4x4 : 5 W  
(Windows Vista and Windows XP are not supported)  
External dimensions  
US-2x2 : 186 × 65 × 160 mm (width × height × depth)  
US-4x4 : 296 × 65 × 160 mm (width × height × depth)  
Computer hardware requirements  
Windows computer with a USB 2.0 port  
CPU/processor speed  
2 GHz or faster dual core processor (x86)  
Weight  
US-2x2: 1.1 kg  
US-4x4: 1.6 kg  
Memory  
2 GB or more  
Operating temperature range  
5–35 °C  
CAUTION  
Operation of this unit was confirmed using standard  
computers that meet the above requirements. This does  
not guarantee operation with all computers that meet the  
above requirements. Even computers that meet the same  
system requirements might have processing capabilities  
that differ according to their settings and other operating  
conditions  
Bundled DAW software  
SONAR LE (for Windows)  
Cubase LE  
Dimensional drawings  
Mac OS X  
8
US-4x4  
Supported operating systems  
OS X Yosemite (10.10 or later)  
OS X Mavericks (10.9.1 or later)  
OS X Mountain Lion (10.8.4 or later)  
Computer hardware requirements  
Apple Macintosh computer with a USB 2.0 port  
CPU/processor speed  
2 GHz or faster dual core processor  
ꢀꢁꢂ  
ꢂꢅ  
Memory  
2 GB or more  
iOS devices  
Apple devices running iOS 7 or later  
8
US-2x2  
Supported audio drivers  
Windows: ASIO2.0, WDM, MIDI  
Mac: Core Audio, Core MIDI  
ꢀꢄꢁ  
ꢁꢃ  
Illustrations in this reference manual might differ in part  
from the actual product.  
Specifications and external appearance might be changed  
without notification to improve the product.  
TASCAM US-2x2/US-4x4  
22  
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TASCAM US-2x2/US-4x4  
23  
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TEAC CORPORATION  
Phone: +81-42-356-9143  
1-47 Ochiai, Tama-shi, Tokyo 206-8530 Japan  
TEAC AMERICA, INC.  
Phone: +1-323-726-0303  
1834 Gage Road, Montebello, California 90640 USA  
TEAC MEXICO, S.A. de C.V.  
Phone: +52-55-5010-6000  
Río Churubusco 364, Colonia Del Carmen, Delegación Coyoacán, CP 04100, México DF, México  
TEAC UK Ltd.  
Phone: +44-8451-302511  
2 Huxley Road, Surrey Research Park, Guildford, GU2 7RE, United Kingdom  
TEAC EUROPE GmbH  
Phone: +49-611-71580  
Bahnstrasse 12, 65205 Wiesbaden-Erbenheim, Germany  
TEAC SALES & TRADING(SHENZHEN) CO., LTD  
Phone: +86-755-88311561~2  
Room 817, Block A, Hailrun Complex, 6021 Shennan Blvd., Futian District, Shenzhen 518040, China  
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