AMC IA series User manual

CONTENTS:
Before you start
Precautions 3
Before you start 5
Controls and connections
Front panel 6
Rear panel 6
Connections 7
Specifications
iagrams 9
Specifications 10

Security Precautions
Carefully READ instructions before use.
Amplifier can be operated on either 115 V or 230 V (50-60Hz), which can be selected by changing switch
position on the rear panel. The amplifier is factory set to 230 VAC mains voltage.
Keep this user manual nearby for any reference.
Precaution points and notices
Below-described precaution points and notices are to prevent self injury and property damage. Before
operating the amplifier, read this manual first to get known of potential safety hazard and to understand the
meaning of the precaution points and notices.
DO NOT install or mount the amplifier on unstable objects, such as on the rickety table or the slanted
surface. It may result in the amplifier to fall and cause body injury and/or property damage.
Be sure to ground to the safety ground (earth) terminal to avoid electric shock. Never ground to a gas pipe.
Use the amplifier only with appropriate voltage specified on the amplifier. Using the voltage higher than
specified may cause fire or electric shock.
DO NOT cut, twist, damage, nor modify the power supply cord. In addition, avoid using the power cord
close to heaters, and don’t place heavy object, including the amplifier itself, on the power cord, for it may
cause fire or electric shock.
DO NOT expose the amplifier to rain or the environment where water or other liquids may be splashed,
doing this, it may cause fire or electric shock.
DO NOT remove nor plug in the power supply plug with wet hands, for it may cause electric shock.
Be sure to grasp the power supply plug when unplugging. O NOT pull on the cord itself. Operating the
amplifier with damaged power supply cord may cause fire or electric shock.
Avoid installing the amplifier in humid or dusty places, the area exposed to the direct sunlight, locations
generating smoke or steam, or the spot near the heaters. It may result in fire or electric shock.
When moving the amplifier, be sure to remove its power supply cord from the wall outlet. Moving the
amplifier with the power cord connected to the outlet may cause damage to the power cord, and resulting
in fire or electric shock. When removing the power cord, be sure to grasp its plug to pull.
DO NOT Block the ventilation slots of the amplifier chassis. It will cause the temperature rising and may
result fire.

■ AC Power Source The supply transformer has been designed for use on either 115V or 230V, (50-60Hz),
selected by a push switch on the rear panel. The amplifier is factory set to 230V mains voltage.
When using the Amp ifier
When following irregular situations are found while using amplifier, immediately switch off the power,
disconnect the power supply plug from the AC outlet. on’t try to operate the amplifier again until
inspected by local dealer. Contact your local dealer to check the amplifier.
The amplifier falls.
Amplifier is malfunction.
Water or any metallic object gets into the amplifier.
The smoke or strange smell coming from the amplifier.
The power supply cord is damaged, such as exposure of the core, disconnection etc..
DO NOT put cups, bowls, or other containers with liquid or metallic object in it on the top of the amplifier. If
accidentally spilled onto the amplifier, it may result fire or electric shock.
DO NOT touch the power supply plug during thundering and lightning, for it may result electric shock.
DO NOT insert or drop the metallic objects or flammable materials into the ventilation slots of the amplifier,
for it may result fire or electric shock.
DO NOT open nor remove the amplifier cover to prevent fire or electric shock, for there are high voltage
components inside.
Make sure that the volume control is turned to minimum position before power is switched on. Loud sound
produced at high volume when power is switched on may damage hearing.
DO NOT place heavy objects on the amplifier, for it may cause it fall and may result in body injury and/or
property damage. Besides, the object itself may cause damage or body injury.
DO NOT operate the amplifier for the extended period of time when sound distortion is heard. It is an
indication of malfunction, which may cause heat and result fire.
Switch the power off, and unplug the power supply plug from the AC outlet for safety purposes, when
cleaning or leaving the amplifier unused for 7 days or more. Fire or electric shock may occur.
If the dust accumulates on the power supply plug or on the wall AC outlet, fire may result in. Clean it
periodically. In addition, make sure the plug is inserted in the wall outlet securely.
Contact your local dealer to clean the dust, it the dust has accumulated in the amplifier for a long period of
time. ust accumulation may result fire or damage.

Congratulations and thank you for the purchasing iA series commercial power amplifier.
These amplifiers are designed to provide a big impact in sound reproduction and to produce
the best and highest quality audio at an affordable price. We wish you great enjoyment and satisfaction when
using your amplifier, whether you are an installation, or reinforcement engineer.
Unpacking and Insta ation
Although it is neither complicated to install nor difficult to operate your amplifier, a few minutes of your time is
required to read this manual for a properly wired installation and becoming familiar with its features and how
to use them. Please take a great care may be needed when moving your set and are required if it ever becomes
necessary to return your set for service. Never place the unit near radiator, in front of heating vents, to direct
sunlight, in excessive humid or dusty location to avoid damages and to guaranty a long reliable use. Connect
your unit with the system components according to the description on the following pages.
Features
The iA120, iA240 and iA360 are comprehensive, qualified power amplifier solutions for
commercial and industrial applications. These units provide all necessary features in a
multifarious building-block format.
One line input and one link output with XLR jacks.
Low impedance(4Ω) and constant voltage(70V, 100V) output with phoenix connector.
120 Watts (iA120), 240 Watts (iA240) and 360 Watts (iA360) rated power output.
Advanced protection system includes current limiting, over current and thermal protection.
19-inches standard rack mountable type.
Wide frequency range from 40 Hz to 16 kHz ± 3dB.
Low distortion and low noise level.
esigned for operation on either AC Mains or C 24V evacuations.
Adjustable input level from -12dB to 0dB.
Built in 400Hz high-pass filter.
Built in high temperature detection and automuting function.
Expandability by adding power amplifier with LINK terminal.
Compact size(2U) and lightweight.
Ideal commercial and industrial use.

FRONT PANEL
1. Ventilation fan
2. Indicators (Protection and Output level)
3. Power switch with power indicator.
REAR PANEL
1. C +24V input terminal
2. AC power input connector with fuse holder
Mode / Vo tage
115/120 V
AC
220 /230 / 240 V
AC
iA120
T4AL / 250V T 3.15AL / 250 V
i
A240
T8AL / 250V T4AL / 250 V
iA360
T12AL / 250V T6.3AH / 250 V
3. Speaker connection terminal (4 Ohm, 70 V, 100 V and COM)
4. Level adjustment (-12 dB to 0 dB)
5. HPF (400 Hz) On/Off switch
6. Signal input and Link output connectors
7. Ground switch for provide against ground loop
8. Air flow

Wiring Guide
We recommend using pre-built or professionally wired balanced line for input connector. 22 to 24
gauge cables.
Below picture shows connector pin assignments for wiring.
1. ground/shield
2. hot (+ve)
3. cold (- ve)
For unbalanced connection
pin 1 and 3 have to be bridged
For output connector we recommend using pre-built or professionally wired, high quality, and heavy
gauge speaker wires. You may use Phoenix blocks for your output connectors.
To prevent the possibility of short-circuits, wrap or insulate exposed loudspeaker cable connectors.
Using the guidelines below, select the appropriate size wire based on the distance between amplifier
and speaker. The wire sizes are given for a 4-ohm load.
NOTE : Custom wiring should only be performed by qualified personnel.
CAUTION : Never use shielded cable for output power wiring
Distance
Wire size
Up to 25 ft. (7,5 m) 16 AWG (Ø 1,29mm)
25 - 40 ft. (7,5 - 12 m) 14 AWG (Ø 1,62mm)
40 - 60 ft. (12 m - 18 m) 12AWG (Ø 2,05 mm)
60 -100 ft. (18 m - 30 m) 10AWG (Ø 2,5 mm)
100 - 150 ft. (30 m - 45 m) 8AWG (Ø 3,2 mm)
150 - 200 ft (45 m - 60m) 6AWG (Ø 4,11 mm)
4 Ohm Wire Guide
OUTPUT : Maintain proper polarity on output connectors.
For output channel, connect the output EURO block terminals to the loudspeaker loads. Use
terminals marked (4Ω) for a 4-ohm loudspeaker load, or use terminals marked 70V or 100V and
COM for constant-voltage loudspeaker loads.
Connect the COM terminal to speaker negative(-) lead; connect one of the other terminals to
speaker positive(+) lead.
Impedance and output voltages
iA120
4Ω / 22V 41Ω / 70V 83Ω / 100V
iA240
4Ω / 31V 21Ω / 70V 41Ω / 100V
iA360
4Ω / 38V 13.6Ω / 70V 27.8Ω / 100V

Impedance and output voltage table represents total speaker system impedances.
Possible speaker connections are shown above
CAUTION : Never use both the Low-Z(4 ohms) and Hi-Z(70V and 100V) terminals at the same time.

Specifications
iA120
iA240
iA360
E ectrica
Rated output power
120 Watt 240 Watt 360 Watt
Gain contro
-12 dB to 0 dB
Input Sensitivity
(at Ba anced ine)
1,0 ± 0,1Vrms / 10 kOhm
High
-
pass Fi ter(at
400Hz)
-3dB
Frequency Response
+1,5 / -3 dB at 70Hz - 18kHz
S/N Ratio
Better than 90 dB
T.H.D at 1/2 rated
output, 1kHz
Less than 1,0%
Output Vo tage and
Impedance
4Ω / 22V 4Ω / 31V 4Ω / 38V
41Ω / 70V 21Ω / 70V 13.6Ω / 70V
83Ω / 100V 41Ω / 100V 27.8Ω / 100V
Constructions
Coo ing
Fan
Operating
temperature/humidity
0° to 40°C at 95% at non-condensing
Dimensions
(width/height/depth)
482 mm x 88 mm x 340 mm
Net weight
11,65kg 13,87kg 15,16kg
Power consumption at
1/8 power
185W 361W 525W
Power requirement
s
AC100V-240V, 50/60Hz and/or C24V
AMC is a registered trademark of AMC Baltic www.amcpro.lt