ITC Audio T-20AP User manual

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.
MIXER AMPLIFIER
T-20AP
OPERATION MANUAL
AUDIOAUDIO
PUBLIC ADDRESS SYSTEM
ON
OFF
MIC1
INPUT
BASS
-5
0
-1
-2
-3
-4
+1
+2
+3
+4
+5
TREBLE
-5
0
-1
-2
-3
-4
+1
+2
+3
+4
+5 0
1
2
3
456
7
8
9
10
MIC2
TEL
0
1
2
3
456
7
8
9
10
OUTPUT LEVEL
246 8 10
PROT
POWER
0
1
2
3
456
7
8
9
10
MIC1
AUX
0
1
2
3
456
7
8
9
10
T-20AP
MIXER AMPLIFIER
5
0
1
2
3
4 6
7
8
9
10
MASTER

TABLE OF CONTENTS
1. SAFETY PRECAUTIONS .......................................................................................1
2. FEATURES ...............................................................................................................3
3. NOMENCLATURE AND FUNCTIONS
3.1 Front Panel ............................................................................................................ 4
3.2 Rear Panel...............................................................................................................5
4. CONNECTIONS
4.1. Speaker Connections .............................................................................................6
5.MACHINE OPERATION ..........................................................................................7
6. APPLICATIONS .......................................................................................................8
BLOCK DIAGRAM...................................................................................................9
8.SPECIFICATIONS ..................................................................................................10
9.DIMENSIONAL DIAGRAM ....................................................................................11
7.

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 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 dealer.
ITC
ITC
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
1. SAFETY PRECAUTIONS
T-20AP

2
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
Never plug in nor remove the power supply plug
with wet hands, as doing so may cause electric
shock.
When unplugging the power supply cord, be sure
to grasp 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.
When moving the unit, be sure to remove its power
supply cord from the wall outlet. Moving the unit
with the power cord connected to the outlet may
cause damage to the power cord, resulting in fire or
electric shock. When removing the power cord, be
sure 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.
Loud noise produced at high volume when power is
switched on can impair hearing.
Do not operate the unit for an extended period of
time with the sound distorting. This is an indication
of a malfunction, which in turn can cause heat to
generate and result in a fire.
Contact your dealer as to the cleaning. If dust
is allowed to accumulate in the unit over a long
period of time, a fire or damage to the unit may
result.
ITC
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.
1. SAFETY PRECAUTIONS
T-20AP

3
2. FEATURES
T-20AP
1. 1 channel MIC2 one-port input (5mv 1Kohms) and 1 channel (300mv 10Kohms) AUX input
2. 1 channel MIC1 balanced/unbalanced input (2.5/5mv 1/2Kohms)
3. 1 channel TELinput (sensitivity: 1V 2Kohms).
4. built-in treble bass adjusting bass 10dB at 100Hz treble 10dB at 10KHz
5. built-in priority functions, TEL priority:Tel override Aux and MIC(1-2),MIC1 is second
priority,override AUX signal except tel signal.

4
3.1 FRONT PANEL
2. POWER SWITCH
On top of the opening Power
Press the end, power shut down
4. TREBLE
Adjust treble response. Rotate clockwise to increase
treble output and anticlockwise to reduce it.
1. POWER
Power indicator
3. BASS
Adjust bass response. Rotate clockwise to increase
bass output and anticlockwise to reduce it.
5. AUX
AUX volume control
3. NOMENCLATURE AND FUNCTIONS
T-20AP
7
6. TEL
TEL volume control
. MIC1 \MIC2
MIC volume control (MIC1/MIC2)
8. MIC1 INPUT
MIC1 input 6.3 Microphone jack input
9. LEVEL INDICATORS
Level meters 6 output level indicators
10. PROT
Protection indicator
12345678
910
T-20AP
MIXER AMPLIFIER
POWER
ON
OFF
OUTPUT LEVER
MIC1
INPUT
BASS MIC1AUX TELTREBLE
1
2
3
456
7
8
9
10
0
-4
-3
-2
-1 0+1
+2
+3
+4
+5
-5
-4
-3
-2
-1 0+1
+2
+3
+4
+5
-5
1
2
3
456
7
8
9
10
0
1
2
3
456
7
8
9
10
0
1
2
3
456
7
8
9
10
0
MIC2
PROT 2 4 6 8 10

5
NOMENCLATUREAND FUCTIONSNOMENCLATUREAND FUCTIONS
3.2 REAR PANEL
T-20AP
SERIAL NO:
PUBLIC ADDRESS SYSTEM
RISQUE DE CHOC ELECTRICUS
-NE PAS QUVRIR
AVIS:
RISK OF ELECTRIC SHOCK
DO NOT OPEN
TEL INPUT
G-+COM 4-16 70V 100V
OUTPUT
LINE
OUT
AUX
MIC 2
MIC 1
INTERRUPT
TIME
ADJ
MIC 1
XLR/6.30 INPUT
BAL / UNBAL
+48V
PHANTOM
~220V-240V 50/60Hz
T1AL 250V
11. Mute adjustor
Adjust the mute degree from 0-
20dB when MIC1 input override all
the other inputs.
12. MIC input with phantom power
MIC1 input compatible of XLR and
6.3 MIC
13. MIC 2 input
MIC2 input of 6.3 MIC
AUX input
AUX for extra equipments input
Line output
onnect to other audio processing
equipments
16. TEL INPUT
17.
14.
15.
C
SPEAKER TERMINALS
Connectors for 4-16 ohms or 70V and 100V
speaker
18.~220V-240V 50/60Hz AC POWER INPUT
11 12 13 14 15 16 17 18

6
70V 100V
COM 4-16 70V 100V COM 4-16
100V LINE
70V 100V
COM 4-16
(T-20AP)
245
70V LINE
4.1 SPEAKER CONNECTIONS
4.2 XLR CONNECTIONS
4-16
4. CONNECTIONS
T-20AP
70V/
(T-20AP)
500

1 Tel has priority over all inputs.
2 MIC 1 is second priority, adjust mute electric
potential can override other input signal except
tel signal.
3 It is the same level of MIC 1, when one of the
two port connect with MIC, another conn ect
MIC port is in vain.
MUTE FUNCTION
1 Machine is in protection
condition in case of high
temperature
2 Wrong wire connection
OPERATIONATTENTION
The four output connectors only can choose two
connectors work together. If voltage is 70V/100V,
the speakers must be with transformer and make
sure the total power wattage of speaker is 15%
less than the power wattage of amplifier.
GUIDANCE OF EXCLUDING ERRORS
No voice output in
normal condition
All the wires are
connected well
but no voice output
Cause
1 No power or wrong
plug connection
2 Fuse is burned
3 Volume is town off
4 No input signal
Power on but ala-
rming signal
1 Overloading or short
circuit
2 Voltage is not stable,
too high or low
Phenomena
5. MACHINE OPERATION
7T-20AP

8
6. APPLICATIONS
T-20AP
SERIAL NO:
PUBLIC ADDRESS SYSTEM
RISQUE DE CHOC ELECTRICUS
-NE PAS QUVRIR
AVIS:
RISK OF ELECTRIC SHOCK
DO NOT OPEN
TEL INPUT
G-+COM 4-16 70V 100V
OUTPUT
LINE
OUT
AUX
MIC 2
MIC 1
INTERRUPT
TIME
ADJ
MIC 1
XLR/6.30 INPUT
BAL / UNBAL
+48V
PHANTOM
~220V-240V 50/60Hz
T1AL 250V
TEL INPUT
MIC 2
AUDIO
OUT
R L
COM
ADRESS TAG
RISK OF ELECTRIC SHOCK
DO NOT OPEN
RISQUE DE CHOC ELECTRICUS
-NE PAS QUVRIR
AVIS:
PUBLIC ADDRESS SYSTEM
SERIAL NO:
AUDIO SOURCES
LINK
INPUTS
RISK OF ELECTRIC SHOCK
DO NOT OPEN
RISQUE DE CHOC ELECTRICUS
-NE PAS QUVRIR
AVIS:
PUBLIC ADDRESSSYSTEM
SERIAL NO:
XLR BAL
1-GND 2-HOT+ 3-COLD
1
2
3
12
3
OUTPUTS
INPUTS
POWER AMPLIFIER
SPEAKERS
MIC1
~220V-240V 50/60Hz
T1AL250V
~220V-240V 50/60Hz
T1AL250V

9
7. BLOCK DIAGRAM
T-20AP
COMP
COMP
GAIN/AMP
GAIN/AMP
GAIN/AMP
POWER
AMP
GAIN/AMP

8. SPECIFICATIONS
10
T-20AP
MIXER AMPLIFIER WITH CDMIXER AMPLIFIER WITH CD
Model
Speaker Line Input
Amplifier Section(amp In @ 1khz,8ohm Load Output)
Rated maximum output power (THD 1%)
Input sensitivity/impedance
Frequency response(At 1KHz Half power output)
MIC(1~2) input section( MIC in@1Khz, preamp out)
Input sensitivity/impedance
AUX input section(AUX in@1Khz, preamp out)
Input sensitivity/impedance
T-20AP
4~16 ,70V,100V
20W
1V/20Kohms
80Hz~16KHz(+1dB/-3dB)
5mV/500ohms/unbalance
2.5mV/500ohms/balance
300mV/500ohms
TEL input section(AUX in@1Khz, preamp out)
Input sensitivity/impedance 1V/500ohms
Power source
Power consumption
Net weight
Dimensions(mm)
~220V-240V 50/60Hz
30W
4.3Kg
276 x270x66
Frequency response(At 1KHz Half power output) 160Hz~16KHz(+1dB/-3dB)

11
100
Over
100
Over
Over
100
UNIT :mm
9. DIMENSIONAL DIAGRAM
UNIT :mm
6
64
64
270
264
66
72
273
276
T-20AP
T-20AP
MIXER AMPLIFIER
POWER
ON
OFF
OUTPUT LEVER
MIC1
INPUT
BASS MIC1AUX TELTREBLE
1
2
3
456
7
8
9
10
0
-4
-3
-2
-1 0+1
+2
+3
+4
+5
-5
-4
-3
-2
-1 0+1
+2
+3
+4
+5
-5
1
2
3
456
7
8
9
10
0
1
2
3
456
7
8
9
10
0
1
2
3
456
7
8
9
10
0
MIC2
PROT 2 4 6 8 10
SERIAL NO:
PUBLIC ADDRESS SYSTEM
RISQUE DE CHOC ELECTRICUS
-NE PAS QUVRIR
AVIS:
RISK OF ELECTRIC SHOCK
DO NOT OPEN
TEL INPUT
G-+COM 4-16 70V 100V
OUTPUT
LINE
OUT
AUX
MIC 2
MIC 1
INTERRUPT
TIME
ADJ
MIC 1
XLR/6.30 INPUT
BAL / UNBAL
+48V
PHANTOM
~220V-240V 50/60Hz
T1AL 250V
T-20AP
MIXER AMPLIFIER
POWER
ON
OFF
OUTPUT LEVER
MIC1
INPUT
BASS MIC1AUX TELTREBLE
1
2
3
456
7
8
9
10
0
-4
-3
-2
-1 0+1
+2
+3
+4
+5
-5
-4
-3
-2
-1 0+1
+2
+3
+4
+5
-5
1
2
3
456
7
8
9
10
0
1
2
3
456
7
8
9
10
0
1
2
3
456
7
8
9
10
0
MIC2
PROT 2 4 6 8 10

2010-08 Version0.1
PROFESSIONAL PUBLIC ADDRESS SYSTEM
AUDIOAUDIO
Guangzhou ITC Electronic Technology Limited
Http://www.itc-pa.com.cn