ITC TA-H4 PRECISION SERIES User manual

OWNER'S MANUALOWNER'S MANUAL
PROFESSIONAL POWER AMPLIFIERS
TA-H4/TA-H6/TA-H8/TA-H10/TA-H12
PRECISION SERIES
POWER
CH1 CH2
ON
OFF
0
1
2
3
456
7
8
9
10 0
1
2
3
456
7
8
9
10
PROTECT
SIGNAL
PEAK
2-CHANNEL AMPLIFIER
TA-H4

1
2
3
4
5
7
8
BACK PANEL
CONNECTIONS
SPECIFICATIONS
DIMENSIONAL
DESCRIPTION
FEATURES
FRONT PANEL
CONTENT
TTENTION: This unit must be protected from moisture because of the risk of
fire and the possibility of electrical shock.
1. Make sure that you have the correct mains voltage. Only operate the unit at the
mains voltage marked on the rear panel.
2. Make sure that nothing, especially metal objects, are inserted into the
amplifier. This could result in a severe electric shock or malfunction.
3. If the unit is subjected to extreme fluctuations of temperature, e.g. on being
transported from outside into a heated room, condensation can form. The unit
should not be used until it has reached room temperature.
4. In the event of water or any other fluid being accidentally spilt on the unit,
switch the unit off immediately and send it to a qualified service workshop for
inspection.
5. Make sure that the unit is always well ventilated and never exposed to direct
sunlight.
6. Do not use sprays to clean the unit as they have a detrimental effect on the unit
and Could ignite ITC denly.
WARNING

Thank you very much for choosing an ITC PRECISION SERIES amplifier. We are sure it will
give you many years of satisfying performance.
ITC power amplifiers of the PRECISION SERIES meet the stringent requirements of tough to-
uring applications. They are protected against over-temperature, overload, shorted outputs,
radio frequency interference and DC faults. The power transistors are protected from damage
from reverse feeding of electrical energy by means of an additional special protective circuit.
For the so-called soft-start, the power outputs are switched on delayed via relays. An inrush
current limiter circuit prevents the mains fuses from being blown.
Maximum precision is also guaranteed as regards mechanical construction and finish. The
robust steel chassis features remarkable torsion resistance and-is specially designed to cope
with the tough wear and tear associated with going on tour. Thermal stability is guaranteed by
several low noise 3-stage fans which also means that they can be used inside the studio. Comp-
arator circuits constantly compare the power amplifiers' input and output signal and control the
Iimiters under non-linear operating conditions.They protect the loudspeakers from overload due
to power stage clipping. The PRECISION S-ERIES power amplifiers feature excellent transmi-
ssion properties. The power amplifier topology also makes for extremely low distortion rates.
Distortion factor (THD), intermodulation distortion (SMPTEIM) and transient intermodulation
distortion (DIM 30 and DIM 100) are so low that they are only detectable with the most sophis-
ticated measuring equipment.Generously dimensioned power supplies with low-leakage toroidal
-core transformers provide considerable headroom well above the nominal ratings. V/I foldback
limner circuits were deliberately not included in the PRECISION SERIES power amplifiers to
facilitate operation at complex loads up to a phase angle of +/- 90.
The inputs are electronically balanced on XLR connectors. (Isolation transformers can be re-
trofitted). Direct Outs in the form of XLR connectors (male), to loop the signal through, are also
standard features. The modes DUAL/Stereo can be selected via the Input Routing Switch. Fur-
thermore, the PRECISION SERIES power amplifiers can also be operated in "Bridged" mode.
The front panel accommodates the dB-calibrated input Gain controls which are designed as
especially precise and safe-to-operate detented potentiometers. The LED display provides in-
formation about the power amplifers' operating status. For the two channels, they demonstrate
readiness to operate, whether there is a signal at the input or output, when the Limiters have
been activated and whether one of the protective features has been triggered. The power out-
puts Channel A, Channel B and Bridged Out are available on Speakon connectors. The rear
side of the unit accommodates the ON/OFF switches for the integrated Hi and Lo cut filters, a
groundlift switch which separates the housing from the circuit ground thus helping to prevent
hum loops and the operating modes selector to mono bridged operation. They also feature ex-
tremely quiet fans with front-to-rear airflow, facilitating operation in large and narrow amplifier
racks.
This Owner's Manual is meant to help you familiarize yourself with all the PRECISION SERIES'
other features. Please read it through carefully and we guarantee that your new power amplifier
of the PRECISION SERIES from ITC will give you great pleasure.
( PAGE 1 )
DESCRIPTION:
DESCRIPTION

Features:
1. Two-channel amplifier will stop 2 * 200 @ 2 /4 /8 , 2 * 300 @ 2 /4 /8,
2*400@2R/4R/8R, 2*500@2R/4R/8R, 2*600@2R/4R/8R output
2. Balanced input
3. Output level indicating
4. With automatic voltage limited output signal function
5. Amp short circuit, overload, over-temperature protection
6. Built-in 150Hz high-pass filter
7. Parallel Output
8. Bridge output
FEATURES
( PAGE 2 )

POWER
CH1 CH2
PROTECT
SIGNAL
PEAK
ON
OFF
0
1
2
3
456
7
8
9
10 0
1
2
3
456
7
8
9
10
Front:
123
654654
FRONT PANEL
1. Level Control
Calibrated detented potentiometers to alterthe total gain of the power amplifier. In orderto avoid disto-
rtion in mixing consoles upstream, these controls should normally be positioned between 0 dB and
-1.5dB. The calibrated markings show the additional attenuation directly.
2. POWER Switch
The unit is switched on via the power switch.The loudspeaker outputs are switched on via delayed rel-
ays so that no startup transients are audible. A current limiter prevents startup peaks on the mains line
and prevents the mains fuse from blowing.
3.Power indication
This LED lights up when the mains switch is pressed. If it does not light up, the unit is not connected to
the mains or the mains fuse has blown.
4.
5.
6. PEAK
Protection indicator
3 seconds before booting the machine boot process, at this time (yellow) to protect light is on, if the
normal self-test machine, then 3 seconds after the start the machine and to protect the lights go out.
If you are in a long time after the boot to protect the state machine is illustrated in Have trouble, please
contact the dealer.
Signal Indicator
When the machine is the normal signal input, the (green) lights. When the machine fails or is not corr
-ect input signal Seeded, (green) light does not shine.
Indicator
When the machine (in red) light is lit when the signal, then the output signal has been distorted, indi-
cating the input signal over Large, reduce the input signal.
( PAGE 3 )

Back:
BACK PANEL
1.Power cord
The power cord connects hear. Only ~220-240V 50/60Hz voltage is acceptable.
2.Power amplifier output XLR-type connectors
SPEAKON output connectors are provided for the power amplifier channels 1 and 2.
3.Power amplifier output connectors
By using the vertically aligned connector for the power amplifier channels 1 and 2.Connecting
your speakers when your amplifier is in the bridge mode. In this way only one speaker is con-
nected.
4.Mode selection (1/2/3/4)
Pull dynamic code "1 / 4" switch "CH1/CH2 LF ON" position, in order to allow the letter below
100Hz frequency No. passed.
Pull dynamic code "2" switch "BRIDGE ON" position, for the bridge mode, input signal from the
channel to "1" Input, the volume from the channel "CH 1" potentiometer control input signal from
the channel "2" input, the volume from the channel "CH 2" potentiometer control.
Pull dynamic code "3" switch "PARALLEL ON" position, for the stereo mode, two channels ind-
ependently.
5.Power amplifier input connectors
The input sensitivity is set to 0dB by the factory. The inputs are electronically balanced.
( PAGE 4 )
12 4 5
5
3
CH1(BRIDGE IN)
INPUTS
TRS TIP
TRS TIP
XLR PIN2
XLR PIN2
CH2
OUTPUTS
BRIDGE
CH2:1+1-
PIN OUT
BRIDGE ON PARALLEL ON
STEREO
CH1 LF ON CH2 LF ON
CH1 LF CUT CH2 LF CUT
CH2CH1
PIN OUT
CH1:1+1-
CH2:2+2-
BRIDGE:1+2-
ON
1234

POWER AMPLIFIER OUTPUT CONNECTORS:
SPEAKON output connectors are provided for the power amplifier channels A(left)and B(right).
The Bridged Out connector for bridged operation is sealed with a plTStic cover to prevent connection
errors.
SPEAKON CONNECTIONS:
Input Link
Pin 1+and
Pin 1-
Pin 2+and
Pin 2-
Speakon Pin1 connection
POWER AMPLIFIER INPUT CONNECTORS:
XLR connectors(male)are provided for Looping the signal to other power amplifiers.These are wir-
ed parallel to the XLR input connectors in each channel.
The inputs of the power amplifier are electronically balanced and wired according to IEC 268.lsolation
transfomers can be retrofitled in order to avoid hum interference in larger sound reinforcement systems.
PleTSecontact your dealer if you have any problems.
Input wiring XLR
PIN 1:SHELD
PIN 2:a,+,hot
PIN 3:b,-,cold
The inputs are electronically balanced.
The input sensitivity is set to 0dBu(775mV)by the factory.PleTSe contact your local dealer if you want
to change to 6dBu or 26dB gain.
+1
-1
+1
-1
Speakon Cable,Speakon, 2 conductors
OUTPUT INPUT
CONNECTIONS
( PAGE 5 )

+ -
AMPLIFIER
REC LINE 10 LINE 9 LINE8 LINE 7
LEFT
RIGHT
MIC INPUTS MIC/LINE INPUTS
MAX9.9W P.T.T 12
3
4
5
6
789
10
INSIDEAC/DC
FUSE220VAC DCPOWER
24VMAX 0.6A
PUBLICADDRESSS YSTEM SERIAL NO:
2 1
3
7
4
5
2
4
2
GND
PRIORITY
CHIME
LEDPWR
MICINPUT
1
3
5
6
7
1
3
6
CHIME
REMOTE
MODELNO: T-2S01
PREAMPLIFIER
2--OUTPUTS--1
T5AL250V
~220V 50Hz
AUX2 OUT AUX1
MIC2 MIC3
MUTE EMC INPUT
MIC2 MIC3
LINE INPUT
OUTPUT
COM 4-16 70V 100V
T5AL250V
MIXER AMPLIFIER
NO.1
NO.1
AMPLIFIER
REC LINE 10 LINE 9 LINE8 LINE 7
LEFT
RIGHT
MIC INPUTS MIC/LINE INPUTS
MAX9.9W P.T.T 12
3
4
5
6
789
10
INSIDEAC/DC
FUSE220VAC DCPOWER
24VMAX 0.6A
PUBLICADDRESSS YSTEM SERIAL NO:
2 1
3
7
4
5
2
4
2
GND
PRIORITY
CHIME
LEDPWR
MICINPUT
1
3
5
6
7
1
36
CHIME
REMOTE
MODELNO: T-2S01
PREAMPLIFIER
2--OUTPUTS--1
MIXER AMPLIFIER
NO.2
NO.2
SPEAKER
+ -
SPEAKER
Connections:
CONNECTIONS
( PAGE 6 )
CH1(BRIDGE IN)
INPUTS
TRS TIP
TRS TIP
XLR PIN2
XLR PIN2
CH2
OUTPUTS
BRIDGE
CH2:1+1-
PIN OUT
BRIDGE ON PARALLEL ON
STEREO
CH1 LF ON CH2 LF ON
CH1 LF CUT CH2 LF CUT
CH2CH1
PIN OUT
CH1:1+1-
CH2:2+2-
BRIDGE:1+2-
ON
1234
T5AL250V
~220V 50Hz
AUX2 OUT AUX1
MIC2 MIC3
MUTE EMC INPUT
MIC2 MIC3
LINE INPUT
OUTPUT
COM 4-16 70V 100V
T5AL250V

Into 8 Ohmsx2
Frequency response
Impedance input
THD+N
S/N (A-Weighted, RMS to
rated output level, input
sensitivity 0dBu)
10Kohms
105dB
Diversion Speed
Weight
Resistance Parameter
(Internal 1KHz)
Separate Degree(At rated
output Power reference
1KHz)
TA-H4
200W
12Kg
>700
10Hz-30KHz/-1dB
0.08%
75V/us
TA-H6
300W
14.7Kg
70dB
( PAGE 7 )
SPECIFICATIONS
TA-H8
400W
TA-H10
500W
TA-H12
600W
17.2Kg 20.4Kg 21.5Kg
Into 4 Ohmsx2
Into 8 Ohmsx2 bridged
Into 4 Ohmsx2 bridged
300W 450W 600W 750W 900W
600W 900W 1200W 1500W 1800W
800W 1100W 1600W 2200W 2800W
Into 8 Ohmsx2
TA-H4
250W
TA-H6
450W
TA-H8
480W
TA-H10
650W
TA-H12
680W
Into 4 Ohmsx2
Into 8 Ohmsx2 bridged
Into 4 Ohmsx2 bridged
350W 550W 680W 800W 980W
700W 1100W 1350W 1600W 1960W
850W 1200W 1800W 2400W 3200W
Voltage Level Gain
(Reference 1KHz)
Sensitivity input
26dB(constant gain option)
0dBu(0.775V)
Dimensions 484x360x88mm 484x400x88mm
Rate Power Output
(20Hz-20KHz/THD 0.1%)
Rate Power Output
(1KHz/THD 10%)

Keep the unit’s all sides over 10cm away from objects that may obstruct air flow to prevent
the unit’s internal temperature rise.
Over 10cm Over 10cm
Over 10cm
88
360
350
88
436
88
484
6
94
( PAGE 8 )
UNIT :mm
DIMENSIONAL
POWER
CH1 CH2
ON
OFF
0
1
2
3
456
7
8
9
10 0
1
2
3
456
7
8
9
10
PROTECT
SIGNAL
PEAK
POWER
CH1 CH2
ON
OFF
0
1
2
3
456
7
8
9
10 0
1
2
3
456
7
8
9
10
PROTECT
SIGNAL
PEAK
CH1(BRIDGE IN)
INPUTS
TRS TIP
TRS TIP
XLR PIN2
XLR PIN2
CH2
OUTPUTS
BRIDGE
CH2:1+1-
PIN OUT
BRIDGE ON PARALLEL ON
STEREO
CH1 LF ON CH2 LF ON
CH1 LF CUT CH2 LF CUT
CH2CH1
PIN OUT
CH1:1+1-
CH2:2+2-
BRIDGE:1+2-
ON
1234

PROFESSIONAL POWER AMPLIFIERS
PRECISION SERIES
Version V0.3