ITC T-B20 User manual

MIXER AMPLIFIER
T-B20
T-B40
T-B60
Please follow the instructions in this manual to obtain the optimum results from this unit.
We also recommend that you keep this manual handy for future reference.
OPERATION MANUAL
PUBLIC ADDRESS SYSTEM

TABLE OF CONTENTS
1. SAFETY PRECAUTIONS .........................................................................................3
2. .......................................................................................5
3. FEATURES .................................................................................................................5
4. NOMENCLATURE AND FUNCTIONS
4.1 Front Panel ............................................................................................................... 6
4.2 Rear Panel.................................................................................................................7
4.3 Remote control...........................................................................................................7
5. ..................................................................................8
6. .......................................................................................11
7.
8.
GENERAL DESCRIPTION
OPERATION ILLUSTRATION
CONNECTION DRAWING
BLOCK DRAWING..............................................................................................12
SPECIFICATION................................................................................................. 13
2

Be sure to read the instructions in this section carefully before use.
Make sure to observe the instructions in this manual as the conventions of safety symbols and messages
regarded as very important precautions are included.
We also recommend you keep this instruction manual handy for future reference.
Safety Symbol and Message Conventions
Safety symbols and messages described below are used in this manual to prevent bodily injury and property
damage which could result from mishandling. Before operating your product, read this manual first and
understand the safety symbols and messages so you are thoroughly aware of the potential safety
Indicates a potentially hazardous situation which, if mishandled, could
result in death or serious personal injury.
Indicates a potentially hazardous situation which, if mishandled, could
result in moderate or minor personal injury, and/or property damage.
When Installing the Unit
Do not expose the unit to rain or an environment
where it may be splashed by water or other liquids,
as doing so may result in fire or electric shock.
Use the unit only with the voltage specified on the
unit. Using a voltage higher than that which is
specified may result in fire or electric shock.
Do not cut, kink, otherwise damage nor modify the
power supply cord. In addition, avoid using the
power cord in close proximity to heaters, and never
place heavy objects -- including the unit itself -- on
the power cord, as doing so may result in fire or
electric shock.
Be sure to replace the unit's terminal cover after
connection completion. Because high voltage is
applied to the speaker terminals, never touch these
terminals to avoid electric shock.
Be sure to ground to the safety ground (earth)
terminal to avoid electric shock. Never ground to a
gas pipe as a catastrophic disaster may result.
Avoid installing or mounting the unit in unstable
locations, such as on a rickety table or a slanted
surface. Doing so may result in the unit falling
down, causing personal injury and/or property
damage.
When the Unit is in Use
Should the following irregularity be found during
use, immediately switch off the power, disconnect
the power supply plug from the AC outlet and
contact your nearest ITC dealer. Make no further
attempt to operate the unit in this condition as this
may cause fire or electric shock.
If you detect smoke or a strange smell coming
from the unit.
If water or any metallic object gets into the unit
If the unit falls, or the unit case breaks
If the power supply cord is damaged (exposure of
the core, disconnection, etc.)
If it is malfunctioning (no tone sounds.)
To prevent a fire or electric shock, never open nor
remove the unit case as there are high voltage
components inside the unit. Refer all servicing to
your nearest ITC dealer.
Do not place cups, bowls, or other containers of
liquid or metallic objects on top of the unit. If they
accidentally spill into the unit, this may cause a fire
or electric shock.
Do not insert nor drop metallic objects or
flammable materials in the ventilation slots of the
unit's cover, as this may result in fire or electric
shock.
1. SAFETY PRECAUTIONS
3

An all-pole mains switch with a contact separation of at least 3 mm in each pole shall be incorporated in
the electrical installation of the building.
When Installing the Unit
Ne ver plug in nor remove the power supply plug
with wet hands, as doing so may cause electric
shock.
Wh en unplugging the power supply cord, be sure
to g rasp the power supply plug; never pull on the
cord itself. Operating the unit with a damaged
power supply cord may cause a fire or electric
shock.
Wh en moving the unit, be sure to remove its power
sup ply cord from the wall outlet. Moving the unit
wit h the power cord connected to the outlet may
cau se damage to the power cord, resulting in fire or
ele ctric shock. When removing the power cord, be
sur e to hold its plug to pull.
Do not block the ventilation slots in the unit's cover.
Doing so may cause heat to build up inside the unit
and result in fire.
Avoid installing the unit in humid or dusty locations,
in locations exposed to the direct sunlight, near the
heaters, or in locations generating sooty smoke or
steam as doing otherwise may result in fire or
electric shock.
When the Unit is in Use
Do not place heavy objects on the unit as this may
cause it to fall or break which may result in
personal injury and/or property damage. In
addition, the object itself may fall off and cause
injury and/or damage.
Make sure that the volume control is set to
minimum position before power is switched on.
Lo ud noise produced at high volume when power is
switched on can impair hearing.
Do not operate the unit for an extended period of
tim e with the sound distorting. This is an indication
of a malfunction, which in turn can cause heat to
ge nerate and result in a fire.
Co ntact your ITC dealer as to the cleaning. If dust is
allowed to accumulate in the unit over
a lo ng period of time, a fire or damage to the
unit may result.
If dust accumulates on the power supply plug or in
the wall AC outlet, a fire may result. Clean it
periodically. In addition, insert the plug in the wall
outlet securely.
Switch off the power, and unplug the power supply
plug from the AC outlet for safety purposes when
cleaning or leaving the unit unused for 10 days or
more. Doing otherwise may cause a fire or electric
shock.
4
SAFETY PRECAUTIONS

This is desktop mini size constant voltage power amplifier, beautiful looking, light, portable, can used in
family, cafe, class room, and other small room for broadcasting.
2. GENERAL DESCRIPTION
5
3. FEATURES
1. .
2. , ,
3. s
.
4.
5. .
6. .
7. .
8.
9.
10.
11. .
12. .
Beautiful, light and portable desktop amplifier
Can used in different sound effect place: 20W 40W 60W for choose.
Good sound with 4~16 ohm output and 100V output, can play music in short distance and can
broadcasting in long distance
Adopt 6.3 audio mic input and RCA input for customer to choose.
1 Mic input with independent volume control
2 audio input with independent volume control
With function of auto play MP3 and power memory
With function of priority, when MIC 1 is in, other audio signal can disconnect.
With power indication light, when power on, the light turn blue.
With signal indication light and can show different color according to different signal.
With function of short circuit, over load, over temperature
With function of MP3 module, can read MP3 in USB flash disk, SD card, support mobile blue tooth

4. NOMENCLATURE AND FUNCTIONS
4.1 FRONT PANEL
6
12345678910 11
12
13
14
1516
17
1819
1.
2.
3. P
4.
5.
6. Mode selection
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
MIC1 input
MP3 power switch
revious track/volume down
Play/Pause
Next one/volume up
MP3-volume control knob
BASS
Adjust bass response. Rotate clockwise to increase bass output and anticlockwise to reduce it.
TREBLE
Adjust treble response. Rotate clockwise to increase treble output and anticlockwise to reduce it.
MASTER
ON/OFF
Power switch, press switch, power on, press again, power off.
POWER
Power indicator light, when power is on, power light is on, otherwise is off.
Electronic Level signal indication light.
AUX2 line input volume control, clockwise rotation, volume increase, otherwise decrease.
AUX1 line input volume control.
MIC1 volume control knob.
USB port.
LED display screen.
SD/MMC card port.
Master volume controls all size of input signal level.

NOMENCLATURE AND FUNCTIONS
4.2 REAR PANEL
20. power
21. Vents
22.
23.
24.
AC input
Connecting the speaker terminal. COM is for public terminal which could be connected with
negative terminal and the ground wire. 4~16 terminal is used to connect the speaker with
impedance 4~16 ; 70V terminal is used to connect the speaker with 70V; 100V terminal is
used to connect the speaker with 100V.
AUX1 unbalance signal input port.
AUX2 unbalance signal input port.
SPEAKER TERMINALS
7
20 21 22 23 24
MODEMODE
STOPSTOP
EQEQ
1
2
3
4
5
6
7
8
910
4.3 Remote control
1. Power switch
2. Mode
3. Previous/next
4. Volume increase/decrease
5. 0~9 number button
6. Play/pause
7. Sound effect control
8. Mute
9. Cycle play button
10. Pause
Normal usage distance of remote control:
Remote control distance: 8 meter, angle: level 35, vertical 15.
Remote control usage attention:
1. When install battery, please mind electrode.
2. Please let remote control aim right with window of host machine.
3. When found remote distance get short and insensitive, please change battery.
4. Please take out battery when don't use it for a long time.
5. Take it easy in case of falling.

5.OPERATIONILLUSTRATION
5.1
5.2
Power indication
Power switch
Figure 5.1/5.2
Note:
Need to confirm device is power on, or please contact with supplier for damage.
Figure 5.3
Note:
1. .
2. .
When mic in, but 6.3 mic is not complete in, can not paging
Before using mic in, should adjust volume to lowest level, or will come to noise
MIC1 adopt 6.3 port, when MIC1 is in, adopt with constant voltage or resistance speaker output, control
volume by knob on panel, and adjust BASS/TREBLE to reach the effect what you want.
5
.3 MIC1 input(6.3mm)
When power switch is "ON", power is on and power indication light is on(Red).
When power switch is "OFF", power is close and light is die out.
8
MIC1
5
0
1
2
3
4 6
7
8
9
10
5
0
1
2
3
4 6
7
8
9
10
5
0
1
2
3
4 6
7
8
9
10
5
0
1
2
3
4 6
7
8
9
10
5
0
1
2
3
4 6
7
8
9
10
MUSIC
ON
OFF
AUX1 MIC1
AUX2
MASTERBASS TREBLE
OUTPUT LEVEL POWER
-8
-6
-4
-2 0+2
+4
+6
+8
+10-10
-8
-6
-4
-2 0+2
+4
+6
+8
+10-10
USB MP3
SD MHZ
OFFON MODE IN V- V+
88:8.8
MIC1
5
5
0
0
1
1
2
2
3
3
4
4
6
6
7
7
8
8
9
9
10
10
5
5
0
0
1
1
2
2
3
3
4
4
6
6
7
7
8
8
9
9
10
10
5
5
0
0
1
1
2
2
3
3
4
4
6
6
7
7
8
8
9
9
10
10
5
5
0
0
1
1
2
2
3
3
4
4
6
6
7
7
8
8
9
9
10
10
5
5
0
0
1
1
2
2
3
3
4
4
6
6
7
7
8
8
9
9
10
10
MUSICMUSIC
ONON
OFFOFF
AUX1AUX1 MIC1MIC1
AUX2AUX2
MASTERMASTERBASSBASS TREBLETREBLE
OUTPUT LEVELOUTPUT LEVEL POWERPOWER
-8-8
-6-6
-4-4
-2-2 00+2+2
+4+4
+6+6
+8+8
+10+10-10-10
-8-8
-6-6
-4-4
-2-2 00+2+2
+4+4
+6+6
+8+8
+10+10-10-10
USB MP3
SD MHZ
OFFON MODE IN V- V+
88:8.8

OPERATION ILLUSTRATION
9
5.4 input
AUX1/AUX2
Figure 5.4
When back panel AUX1/AUX2 assist in, its volume should be control by AUX1/AUX2 knob, and combine
with BASS/TREBLE adjustment to reach effect you want.AU X1/AUX2 assist input should adopt RCA
unbalance connect port input, can used to connect with CD/MP3/TUNER .
5.5
4~16 /100V speaker output
Figure 5.5
The loudspeaker output with constant resistance and constant voltage in two ways, convenient to choose.
100V and 4~16 output can only have one and COM at the same time use the connection at the same time
corresponding constant pressure or constant resistance horn. With line between the transformer and the
speaker of the total power should be less than the rated power output power amplifier.
Note:
1. When using assistant input, should adjust volume in middle level to prevent noise.
2. Don't let audio source to many device, or will cause noi es.
Note:
1. When use the device, pay attention to the positive and negative connection, avoid burning the
speaker.
2. Connection terminals fender is completed, please be sure to set up. Speaker terminals with high
voltage, do not touch, to avoid electric shock.
Volume control
CD
ON
OFF
POWER
OPEN/
CLOSE
CD/
USB
/SD
PLAY STOP NEXTPREVIOUS
USB
4 16 speaker~100V speaker

OPERATION ILLUSTRATION
10
5.7
The Blue tooth function operation instruction on the mobile-phone
Press the "MODE" button on the MP3 player to set it on Blue tooth mode.
Find the Blue tooth setting on the mobile-phone.
Turn on the Blue tooth of the mobile-phone. If the Blue tooth is on, then skip this step.
As the systems of the mobile-phones vary, the setting screen may have slightly difference.
It needs to note that the mobile-phone needs to be set Visible to all nearby Blue tooth devices.
Otherwise, it may fail to do the searching and matching.
When the device is found, choose it to connect with the MP3 player. Then the music of the
mobile-phone can be played on the amplifier.
5.6
The Operation Instruction of Built-in MP3
The MP3 can be switched on/off separately. The USB interface and SD card take the priority of others.
"OFF/ON" switch: when the switch is set to ON, the power is on; when the switch set to OFF,
the power is off.
"MODE" button: there are 3 modes for choice: radio, blue tooth, audio.
" " button: short press to select the previous track, long press to reduce the volume.
" " button: in the audio status, press the first time to pause, the second time to continue.
" " button: short press to select the next track, long press to increase the volume.
The "RPT" button on the remote control can set two modes: single cycle and all cycle.
The "EQ" button on the remote control can choose different sound effects according to the users
preferences.
Note:
1. The user needs to push the button with a proper strength to avoid destroying the button.
2. Operate the remote control in a possibly short range since when obstacles exist, the remote
control can not work in a long distance.
3. If the button is loose or fail to work, please change the remote control or battery. If the problems
occur again, please contact the supplier.
4. The SD card or USB interface must be inserted in the right way to avoid the damage to the SD
card or USB interface.

6.CONNECTION DIAGRAM
11
MODE
STOP
EQ
CD player
Power input
ON
OFF
POWER
OPEN/
CLOSE
CD/
USB
/SD
PLAY STOP NEXTPREVIOUS
USB
100V speaker
4~16 speaker
MIC1 input

7. BLOCK DIAGRAM
12

8. SPECIFICATIONS
Input sensitivity/impedance
Frequency response
Loudspeaker output
Tone
Input Sensitivity & source impedance
Signal to noise ratio
THD
Protection
Power supply
Power Consumption
Dimension(mm)
Weight
Priority
13
2.8Kg
4~16 /100V
80Hz~16KHz(-3dB)
75dB
Rated power output, distortion 1%
40W
MIC IN: +5mV, unbalanced 6.3 connection terminal
AUX IN: 350mV, unbalanced RCA connection terminal
MIC1
Model T-B20 T-B40 T-B60
20W 40W 60W
Bass: 100Hz 10dB
Treble: 10KHz 10dB
thermal-shutdown protection, short-circuit protection,
overload, protection
284x188x 66.5
~110V 50Hz ~110V 60Hz
~120V 50Hz ~120V 60Hz
~220V 50Hz ~220V 60Hz
~230V 50Hz ~230V 60Hz
~240V 50Hz ~240V 60Hz
80W 120W
3.5Kg 4.2Kg

PUBLIC ADDRESS SYSTEM
VersionV0.1