AVE AMI-120 User manual

User manual AMI –120/AMI –240 page 1
Vertriebs-
Entwicklungsgesellschaft
mbH
AMI - 120 / AMI –240
Mixing amplifier
User Manual
Table of contents
1 . Important safety instructions
2. Declaration of conformity
3. User’s liability
3.1 Damages to the loudspeakers
3.2 Dangerous output voltage
3.3 Radio interferences
4. Introduction
4.1 Unpacking
4.2 Assembly
5. Description
6. Features
7. Front Panel: Controls and Indicators
8. Back Panel: Controls and Connectors
9. Power Supply
10. Connections
10.1 General criteria
10.2 Balanced Mic/Line Input
10.3 Pre Out
10.4 Main in
10.5 AUX1/AUX2
10.6 REC
10.7 Power Output
11. Protection System
11.1 Power Output Short Circuit
11.2 Turn On /Turn Off Delay
11.3 Power Unit Over Temperature
12. Advanced Functions
12.1 Noise Gate
12.2 Pre Out Setting
13. System Setup (Step by Step)
14. Technical Specifications

User manual AMI –120/AMI –240 page 2
1. Important safety instructions
This symbol indicates the presence
of important directions for use and
information that should be given
particular attention so as to use the
product properly.
This symbol indicates the presence
of “dangerous voltage” that may
cause the risk of electrical shock.
Pay the utmost attention and
proceed cautiously.
.
1. Follow carefully the attached documentation and keep it for future reference
2. Comply with the warnings
3. Store the packaging and check that all material is in excellent conditions.
4. Do not use water near the product, do not pour water or any other liquid on the amplifier. Do not to use it with wet
hands or feet into the water.
5. Do not use next to heat sources such as radiators, stoves or the like.
6. Check the integrity of the mains cable. Do not tread on the cable and do not squeeze the plug.
7. Connect the plug to a socket equipped with grounding. Do not camper the plug. If the plug supplied is not
consistent with your socket, please apply to an electrician for its replacement.
8. Connect to supply mains with the same voltage as indicated on the back of the amplifier.
9. Install the amplifier in compliance with the instructions.
10. Do not obstruct the air ducts.
11. Disconnect the appliance in case of storm and if unused.
12. Connect according to the instructions only.
13. Do not connect input signal higher than that indicated in the manual.
14. Do not connect the amplifier output to the input of another channel.
15. Do not connect any output of the amplifier to power sources such as battery, voltage supply or outlet, regardless
of the amplifier is on or off.
16. Keep the volume controls to a minimum during the amplifier switching on/off .
17. Do not remove the upper or lower cover: there is a risk of electrical shock.
18. Do not try to self-repair the appliance, but apply to qualified personnel.
19. Clean with a dry cloth only.

User manual AMI –120/AMI –240 page 3
20. The product shall be handled by skilled personnel in the following cases:
Mains cable or plug damaged
Exposure of the product to rain or humidity
Some liquid entered inside the unit.
An object fell on the unit
The unit fell down and is damaged
The product does not work correctly or shows a remarkable change of performance.
21. A careful supervision is necessary if the product is used in the presence of children or inexpert adults.
22. This product could produce sound levels, which cause damage to the hearing. Pay the utmost attention and do
not operate at high level of volume or at an uncomfortable level for a long time. Consult an audiometric specialist
in case of hearing loss or complaints.
2. Declaration of conformity
This device conforms to the requirements of the EMC directive 2004/108/EEC, and the requirements of the Low
Voltage Directive 2006/95/EEC.
Standards Applied:
EN55103-1 (Emissions)
EN55103-2 (Immunity)
EN60065, Class I (Safety)
3. User’s liability
3.1. Damages to the loudspeakers
Always check the peak and continuous power of the loudspeakers.
This amplifier is extremely powerful and can be potentially dangerous both for the loudspeakers and for the
persons.Most loudspeakers may be easily damaged or broken. Even if there is a gain reduction through the
attenuators on the amplifier’s front panel, it is still possible to reach the maximum output power if the input signal level
is high enough.
3.2. Dangerous output voltage
The amplifier can generate hazardous output voltage. Do not touch exposed cables of loudspeakers with the amplifier
in operation.

User manual AMI –120/AMI –240 page 4
3.3 Radio interferences
A sample of this product has been tested and approved to meet the requirements of the Electromagnetic Compatibility
Directive (EMC). These requirements have been defined so as to provide reasonable protection against dangerous
interference of electrical equipment. Whenever this product has not been installed or handled according to these
guidelines, it might interfere with other equipment such as radio receivers. However, there is no guarantee that they
should not occur in a specific installation. Should this equipment interfere with transceiver equipment (such possibility
can be checked by switching on and off the device), the user should try to cancel the interference by observing one or
more of the following measures:
Increase the distance between the device and the receiver.
Connect the device to a plug linked to a different circuit with respect to the one to which the receiver is connected.
Redirect or move the receiver’s antenna.
Make sure that the unit concerned conforms to the EMC immunity limits (CE-labelled). All electrical equipment
sold in the EC should be approved as for what concerns protection against electromagnetic fields, high tension
and radio interference.
Contact qualified personnel.
4. Introduction
Congratulations on choosing AVE device and thanks for trusting us and our products. Your device has been carefully
planned in the smallest details, starting with every part of its equipment till final assemblage. All products AVE are
made with the main purpose of guaranteeing our clients’ full satisfaction, thus we underline that the product you have
chosen uses the most advanced technology.
An improper use of the device can compromise its correct operation. Therefore we recommend you to carefully and
correctly use it.
Read this manual carefully as it contains essential information for a safe use of your device.
4.1. Unpacking
Immediately inspect the package and its content so as to check whether there are any signs of damage. After
unpacking check the product and all parts, if you notice any damage inform your dealer immediately.
It is advisable to save the packaging materials even if the amplifier shows no sign of shipping damage; you might have
to return it to AVE or to one of its dealers. Use the original package only, which is the best way to protect the
equipment from shipping mishandling.

User manual AMI –120/AMI –240 page 5
4.2. Assembly
Metal framing of all the AVE products is suitable to be supported on a surface (table, etc.) and is equipped with
separated stirrups for assembly in 19” rack standard.
Pay particular attention during the installation; we remind you that the devices should not be installed in places with:
High temperatures
Dust and excessive humidity
Presence of intense magnetic fields
Water next to the component
Vibrations
Closed spaces inhibiting a proper ventilation
5. Description
AVE has developed a series of mixer and integrated amplifiers, with unique features and technical specifications that
excel these from similar products. Their three bands equalizer for each of the six inputs, guarantees clear sound
quality and a perfect intelligibility.
Monophonics amplifier and mixer of AMI Series has 6 MIC/AUX inputs (labelled with 1-6), electronically balanced,
adjustable for medium-high level microphone and sources, connected to input sockets for a simple use (as later
indicated), 1 LINK IN input, 1 PRE OUT output.
A 24 VCC potential is available for the 6 MIC sockets, which could be inserted by a 6 way micro-switch and conveyed
on the phonic line, the same potential for the eventual direct “phantom” power supply of electret microphones.
It has a power indicator and led vu meters, sensitivity controls (GAIN), tones (TREBLE, MIDDLE, BASS), volume
(LEVEL) separated to each input and main volume control (MASTER).
Audio power outputs for loudspeakers of amplified series (AMI120 and AMI240) are arranged for connection to
constant impedance lines and constant voltage.
This evolved version of AMI Series, has been improved with Noise Gate processor to optimize the product
performance also in very difficult noise situations, such as those that can be found in Places of Worship and congress
halls.
Noise Gate, complete with adjustable threshold of activation, allows to minimize the reproduction of noise when no
microphones are used.
This solution enables the best management of any sound system by the use of a single product, with a significant cost
and space saving.The whole electronic circulation has quality and safety features in working; it is provided with “earth-
lift” switch (on the back). Metal framing is suitable to be supported on a surface (table, etc.) and is equipped with
separated stirrups for assembly in 19” rack; in this case it occupies 2 U units = 88mm.

User manual AMI –120/AMI –240 page 6
6. Features
Constant Impedance and constant Voltage outputs (Amplified Version)
6 balanced Micro/Line XLR inputs complete of selectable 24Vdc Phantom supply
2 stereo AUX RCA inputs
1 Stereo REC RCA output
3 band Equalizer for each input
Output level meter indicator
Arranged for 19” rack mounting in 2 unit space
Noise Gate function with adjustable threshold of activation
7. Front Panel: Controls and Indicators
1 Treble - Micro/Line and AUX inputs Treble tone control
2 Gain - Micro/Line and AUX inputs gain control
3 Middle - Micro/Line and AUX inputs Middle tone control
4 Bass - Micro/Line and AUX inputs Bass tone control
5 Noise Gate – Closed inputs status led indicator
6 Noise Gate – Open inputs status led indicator
7 Level - Micro/Line and AUX inputs level control
8 Level meter – Output signal level led indicator
9 Master – Main level control
10 Power-on-LED
11 Noise Gate – Noise Gate activation threshold control
12 Power – Power on switch

User manual AMI –120/AMI –240 page 7
8. Back Panel: Controls and Connectors
1 Power out – Output connector for loudspeaker lines connection
2 MICRO/LINE – balanced inputs with variable sensitivity
3 Mains – AC 230V power supply socket, with incorporated protection fuse
4 Ground-Lift - Selector for the connection of the electric ground with chassis
5 PRE OUT – Mixed balanced output of the amplifier “PRE” section
6 LINK IN – unbalanced input, mixed and main level control dependent
7 REC – Mixed stereo line output
8 AUX1 / AUX 2 – Stereo line input
9 Phantom 24 V - 24V Phantom activation selector for CH1, CH2, CH3, CH4, CH5 and CH6 inputs
9. Power Supply
The unit is expected to work with 230 VCA –50/60 Hz distribution system.
In case of power dysfunction, check the outside protection fuses and eventually replace them with others of same
calibration; if one of them burns out immediately, do not go on and have check the unit by qualified personnel.
Take away plug from 230 VCA electric power socket always, before removing fuses.
10. Connections
10.1 General criteria
In order to allow the equipment to work correctly, it is advisable to comply with a number of general criteria when
making the connections:
Avoid positioning cables or microphones on the cabinet of the equipment.
Avoid laying the signal lines parallel to the power-supply lines. Keep a minimum distance of 30/40 cm.
Position the input lines and the output lines at a distance from one another.
In order to avoid acoustic feedback (the Larsen effect), position the microphones out of the angle of coverage of
the loudspeakers
10.2 Balanced Mic / Line Inputs
The 6 female XLR input sockets for the mic / line level signals
are located on the rear panel of the equipment. These inputs
are electronically balanced. The mic / line sensitivity could be
adjusted through the Gain control placed on the front panel. 24Vdc “phantom” supply could be joint to each socket.
Before connecting a microphone it should pay attention to the model. In case of dynamic microphone do not insert 24
Vdc; insert it with electret microphone only. CH5 and CH6 socket cannot be used at the same time of AUX 1 and AUX
2 sockets, because electronic circuits and controls are in common: CH5 with AUX 1, CH6 with AUX 2.

User manual AMI –120/AMI –240 page 8
10.3 Pre Out
The Jack output socket (5) fort he preamplified signal are located
On the rear panel oft he equipment.
The figure shows the connections to this socket..
This output is electronically balanced
10.4 Link In
The Jack input socket (6) for the eventual connection from
other audio source, directly “mixed” to preamplifier is located
on the rear panel of the equipment. The figure shows
the connections to this socket. T
his input is unbalanced and main level control dependant.
10.5. AUX 1 / AUX 2
The 2 couple of mono female RCA input sockets for the AUX sources are located on the rear panel of the equipment.
These inputs are unbalanced.
10.6. REC
The couple of mono female RCA output socket for the REC preamplified signal and 3 band EQ of each channel
processed is located on the rear panel of the equipment. This output is unbalanced.
10.7. Power Output
The device is provided with a multi-way power output terminal strip for constant-voltage distribution (50, 70, 100 V)
and low impedance (4 Ohms ) systems.
Constant voltage lines
50, 70, 100 V terminals should be used with each loudspeaker equipped with impedance-matching transformers and
parallel connected. This fact makes the system easy to create and, if any of the loudspeakers should be disconnected
from the line for any reason, the rest of the system would continue to function properly. The figure shows the
connections of the line to these sockets.

User manual AMI –120/AMI –240 page 9
Constant impedance lines
4 Ohms terminal should be used in order to achieve the maximum efficiency of the system and to take precautions
from amplifier bad working, it is necessary to check the effective loading impedance of the lines. The total speakers
impedance should be equal or higher than pre-selected value for connection.
To get that, each loudspeaker should be without impedance-matching transformer and should be connected in series
or in series-parallel groups; In any case loudspeakers should also have the same power handling. The figure shows
the connections of the line to these sockets.
11. Protection Systems
In addition to the usual protection consisting of fuses, these products are complete of different protection devices in
order to safeguard them from possible risks of damage.
11.1 Power Output Short Circuit
Applying a lower loading impedance than the rated value means requiring the equipment to supply a power higher
than it can do on a continuous basis.
In order to avoid this problem, the units are equipped with a circuit protecting them against overloads that protects
automatically.
The protection circuit will be tripped immediately on the amplifier if any of the following cases occurs:
Short circuit on one of the loudspeaker outputs.
Loading impedance less than 50% of the rated value.
power required of the loudspeaker system connected to the constant-voltage lines higher than the power that the
amplifier is able to deliver.
Overload conditions are signalled by the fact that the unit doesn’t supply any amplified signal at the power output.
The equipment will resume normal operation after a power cycle as soon as the cause of the overload has been
eliminated.
11.2 Turn On / Turn Off Delay
A mute circuit with relay, with a delayed starting up and immediate power turning off, has been inserted in order to
avoid the switch-on/turn-off transients that may cause damage to the loudspeakers.
11.3 Power Unit Over Temperature
The thermal protection is of the self-resetting type, and is tripped when the equipment reaches an excessively high
temperature.
This may be due, for example, to the fact that the ambient temperature is too high or to the insufficient ventilation of
the rack cabinet.
The equipment will resume normal operation as soon as the cause of the temperature overload has been eliminated.

User manual AMI –120/AMI –240 page 10
12. Advanced Functions
12.1 Noise Gate
A Noise Gate circuit has been inserted in order to minimize the background noise on the output when no signal is
applied at the input. The channel opening threshold could be adjusted through the controls (14) located on the front
panel of the equipment. Internally bypassable by jumper.
12.2 Pre Out Setting
Internal jumpers are provided to assign Pre or Post Master
Pre Out setting. Thanks this internal setting it is possible
to adjust the Pre Out level by the Master control or make it
independent, following the system requirements.
From the factory, Pre Master setting is assigned.
The figure shows the instructions to assign the Pre Out Setting.
13. System Setup
The inputs of the mixer can accommodate a wide range of sources including active paging stations, dynAMI seriesc
microphones, DVD,CD and Mp3 players and mixers.
The Preout outputs may be used to drive power amplifiers, mixers, or mixer amplifiers.
The Power output may be used to drive constant voltage or constant impedance speaker lines.
Each installation will require setting the appropriate relative mix of levels between paging,
program sources and mic/line inputs for each line or amplified outputs.
Because of the variation in levels between the possible sources, the mixer offers a number of gain stage adjustments
and parameter tools so you can set the correct levels for your application.
Setting up correct parameter structure through the whole system is important to achieve optimal results.
The following step by step procedure has been devised to assist during the setup process.
Connect the speaker lines to the correct power output socket.
Active the phantom supply by the dipswitch (9) located on the back panel if electrect microphones are used.
Ensure that all the Gains and Volume controls are at minimum, and that the Tone controls are flat.
Keep the master volume for each output channel at about 10%÷20%
Keep the input channels LEVEL (9) at about 5 (50%).
Adjust each input channel GAIN (2) in order that the Level Meter (10) green led lit continuously also with low input
signal and that the +3dB red led lit with strong input signal.
Adjust GATE (11) in order to avoid the noise gate activation cause background noise or undesired signal but by
the speaker voice or input signal only.
Adjust the master volume and the input channels LEVEL in order to obtain the required sound pressure.
Adjust the 3 band equalizer (1,3,4) for each channel in order to obtain the best result with each different input
source.