Cleaning the unit
To clean the unit, wipe it gently with a soft dry cloth.
Do not wipe with chemical cleaning cloths, benzene,
thinner, alcohol or other chemical agents. Doing so
could damage the surface or cause discoloration.
Names and functions of parts
Front panel
US-4x4 front panel
1
2
7
8
1 SIG 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).
2 PEAK 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).
3 GAIN knobs
Use to adjust the input levels of the IN1/IN2 jacks
(and US-4x4 IN3/IN4 jacks).
4 USB indicator
This lights when the USB connection is working.
5 LINE OUT knob
Use to adjust the output level of the LINE OUT
1-2 jacks.
6 PHONES knob
Use to adjust the output level of the PHONES jack
( 1 and
2 jacks on 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.
7 Phantom power switch/indicator
Use this switch to provide +48V phantom power
to the IN1/IN2 jacks (and US-4x4 IN3/IN4 jacks).
The indicator lights when the phantom power
switch is set to +48V.
6
TASCAM US-2x2/US-4x4
3
4 5
9
0
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User registration
Customers in the USA, please visit the TASCAM
website (http://tascam.com/) to register as a user
online.
US-2x2 front panel
6
1
w
7
8
8 IN1/IN2 (BALANCED/UNBALANCED) jacks
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 XLR/TRS
combo jacks and standard TRS jacks.
9 IN3/IN4 (BALANCED) jacks
These XLR analog mic input and standard line
level TRS jacks are balanced input jacks.
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.
0 MIC/LINE INST switches
Set according to the IN1/IN2 jack input sources.
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.
2
3
4 5 6
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0