AUDAC COM12 Installation and operating instructions

PROFESSIONAL AUDIO EQUIPMENT
Public Address Amplifier COM12 COM24
User Manual &
Installation Guide
Public
A
ddress
Amp
COM12/COM24
AUDAC

A U D A C P R O F E S S I O N A L A U D I O E Q U I P M E N T
User Manual & Installation Guide
 AUDAC
http: www.audac.be
[e-mail]

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2
INTRODUCTION ........................................................................................................................................................................................................................... 3
ENVIRONMENT............................................................................................................................................................................................................................. 4
SAFETY REQUIREMENTS ......................................................................................................................................................................................................... 5
CAUTION – SERVICING............................................................................................................................................................................................................ 5
PIN CONNECTIONS ON CONNECTORS................................................................................................................................................................................ 6
OVERVIEW FRONT AND REAR PANEL OF THE COM12/COM24 (SAME FOR THE COM24).............................................................................
FRONT........................................................................................................................................................................................................................................... 7
REAR ............................................................................................................................................................................................................................................. 7
OVERVIEW INPUT CONTROLS (SAME FOR THE COM24)............................................................................................................................................ 8
INPUT 1 - 6 (FRONT)................................................................................................................................................................................................................... 8
OVERVIEW OUTPUT CONTROLS (SAME FOR THE COM24) ....................................................................................................................................... 8
OUTPUT 1-5 ( FRONT )............................................................................................................................................................................................................... 8
OVERVIEW INPUT SECTION LINE INPUTS (SAME FOR THE COM24)..................................................................................................................... 9
INPUT 1-6 (REAR) ....................................................................................................................................................................................................................... 9
OVERVIEW INPUT SECTION TELE-PAGING AND REMOTE MIC (SAME FOR THE COM24) ........................................................................... 9
OVERVIEW CASCADING PORTS (SAME FOR THE COM24) .......................................................................................................................................10
CASCADING PORTS (REAR)..................................................................................................................................................................................................10
OVERVIEW OUTPUT SECTION (SAME FOR THE COM24) .......................................................................................................................................... 10
GETTING STARTED................................................................................................................................................................................................................... 11
PRIORITY SETTINGS ................................................................................................................................................................................................................12
PHANTOM POWER .................................................................................................................................................................................................................... 12
TELEPHONE PAGING ...............................................................................................................................................................................................................12
CONNECTING EXTERNAL EQUIPMENT ...........................................................................................................................................................................13
CASCADING COM12/COM24 PUBLIC ADDRESS AMPLIFIERS ..................................................................................................................................13
CONNECTING THE SPEAKERS ............................................................................................................................................................................................. 13
WIRE UP THE SYSTEM.............................................................................................................................................................................................................14
ADDITIONAL INFORMATION COM12/COM24................................................................................................................................................................. 15
T ECHNICAL SPECIFICATIONS .......................................................................................................................................................................................................15
PERSONAL NOTES .....................................................................................................................................................................................................................16
Index

Introduction
This section briefly describes the possibilities of the COM12/COM24 public address
amplifier.
he COM12 COM24 public address amplifier was developed as an easy to use, flexible
solution for multifunctional use.
During the development of the COM12 COM24, the AUDAC-engineers wanted to achieve four
goals:
- Delivering a flexible audio solution to control multiple functions
- Easy to use
- Excellent sound quality
- Modern and advanced design
The COM12 COM24 has 2 stereo unbalanced line level inputs, 2 mono balanced line level inputs,
2 mono balanced line level inputs with priority settings and phantom power, 5 high impedance
100V mono output zones, 1 low impedance 4ohm mono output zone, a link input and output, an
amp input and pre-amp output, a remote microphone input and the possibility to connect a
telephone pager unit.
The COM12 COM24 can be used in commercial applications such as restaurants, hotels, shops,
warehouses, professional offices, public buildings, …
A simple example: when installed in a shop, you could connect: a tuner to play your favorite radio-
station, a microphone to make announcements, a telephone pager, … and off course the doorbell
of the shop.
T

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Environment
Do not place this unit in an enclosed envi onment such as a bookshelf o closet. Ensu e
that the e is adequate ventilation to cool the unit. Do not block the ventilation openings.
Do not place the unit in envi onments which contain high levels of dust, heat, moistu e o
vib ation.
Do not use the unit nea wate o othe liquids. Make su e no wate o othe liquids can be
spilled, d ipped o splashed on the unit.
This unit is developed fo indoo use only. Do not use it outdoo s.
Do not place objects on top of the unit.
Place the unit on a stable base.
Chapter
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5
Safety Requirements
Always handle the unit with ca e.
Only use a g ounded socket outlet and a powe co d with g ounding plug to plug in the
unit.
This unit is not a toy. It should not be ope ated by child en.
Do not stick objects th ough the openings of the COM12/COM24.
Do not open the unit ( isk fo elect ical shock).
The COM12/COM24 contains seve al ‹ jumpe s › which can be set. These settings may
only be done by qualified people.
CAUTION – SERVICING
This unit contains no user serviceable parts. Refer all servicing to qualified
service personnel. Do not perform any servicing unless you are qualified to do
so.
Note
This product conforms to the following European Standards: EN 50081-1: 1992, EN
50082-1: 1992, EN 60065: 1994
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Pin connections on Connectors
Cinch (RCA):
tip = signal (left or right)
ring = ground
XLR:
1 = ground shield
2 = +sig
3 = -sig
XLR female:
XLR male:
6.3mm (1/4”) balanced jack plug:
tip = +sig
ring = -sig
sleeve = ground shield
6.3mm (1/4”) unbalanced jack plug:
tip = signal
sleeve = ground shield

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Overview front and rear panel of the COM12/COM24 (same
for the COM24)
FRONT
REAR
Chapter
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Overview Input Controls (same for the COM24)
INPUT 1 - 6 (FRONT)
Overview Output Controls
(same for the COM24)
OUTPUT 1-5 ( FRONT )
Output
clipping
LED
2 band tone control
Chime button
Zone output routing buttons
Power button and
blue
ON
-
led
Input volume controls
Output VU
-
bar
Master volume
control

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Overview Input section line inputs (same for the COM24)
INPUT 1-6 (REAR)
Overview input section tele-paging and remote mic
(same for
the COM24)
Input Level Gain Controls
Priority switch
XLR balanced line inputs
Microphone phantom
power switch
6.3mm jack balanced line inputs
RCA unbalanced line inputs
Chime volume control Music on hold volume control
Music
on hold output
Remote microphone volume control
Remote microphone input Telephone paging input
XLR 6.3mm jack balanced line inputs

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Overview Cascading Ports (same for the COM24)
CASCADING PORTS (REAR)
Overview output section
(same for the COM24)
Fuse holder
4ohm zone output 100V zone outputs
Power cord
Pre
-
amplifier output
(unbalanced)
Amplifier input (unbalanced)
Link input
(unbalanced)
Link output (unbalanced)

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Getting Started
The COM12 COM24 public address amplifier can be switched on by pressing the power button
on the front panel. The blue ‹ ON › led will light up if the device is powered-up.
On the front panel you can route the input signals to a specific zone output simply by pressing the
routing button of the zone output. If you want to route the input signals to all zone outputs, press
the ‹ All › button. By pressing the routing buttons a second time, the routing will be undone. A pre-
announced chime can be played by pressing the ‹ Chime › button on the front panel.
The volume of the input signals can be controlled by turning the volume knobs of the input
signals on the front panel of the COM12 COM24. The master volume knob and the 2 band tone
control let you adjust the volume, bass and treble of the output signal. A VU-bar indicates the
signal level of the output signal.
On the rear panel, the gain of the input channels and the remote microphone can be adjusted. The
volume of the ‹ chime › and the ‹ music on hold › function can also be adjusted on the rear panel.
The output section on the rear panel of the COM12 COM24 has 5 high impedance zone outputs
for 100V lines and 1 low impedance zone output to connect a 4ohm speaker (or two 8 ohm
speakers in parallel).
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Priority settings
The COM12 COM24 public address amplifier has a 3 layer priority mute function. The first layer
has the highest priority, the third layer has the lowest priority.
Layer 1 Telephone paging
Layer 2 CH1, CH2, Chime, Remote Mic.
Layer 3 CH3, CH4, CH5, CH6
When a source of a higher layer becomes active, all other input signals on the layers below are
muted.
The priority for CH1 and CH2 can be switched ‹ on › or ‹ off › on the rear panel.
Phantom power
When connecting a condenser microphone to CH1 or CH2, the phantom power for the
microphone on the specific channel can be switched on at the rear panel. The phantom power
supplies +15V
DC
to the microphone.
Telephone paging
Connect the tele-paging connector with the tele-paging output of your telephone paging unit.
Connect the ‹ music on hold › connector to the ‹ music on hold › input of the telephone paging
unit.
The music for the ‹ music on hold › function is provided only by the music source connected to
CH6.
Set the ‹ music on hold › volume to a proper level.

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Connecting external equipment
If it is necessary to condition the output signal or to limit the output signal, an equalizer or limiter
can be connected between the mixer section and the amplifier section of the COM12 COM24.
This can be done by connecting the ‹ pre-amp output › to the equalizer or limiter input and
connecting the equalizer or limiter output to the ‹ amp input ›. When you insert a 6.3mm plug into
the ‹ amp input ›, the internal amplifier section will be disconnected from the internal mixer
section.
Cascading COM12/COM24 public address amplifiers
When there’s need for more in- and outputs, the COM12 COM24 amplifiers can be cascaded by
connecting the ‹ link output › from the master to the ‹ link input › of the slave.
Connecting the speakers
Speakers with a matching transformer can be connected to the 5 high impedance outputs on the
rear panel.
A 4ohm speaker (or two 8ohm speakers in parallel) can be connected to the 4ohm low impedance
output at the rear
ATTENTION: NEVER use the high impedance outputs and the low impedance outputs
at the same time.
Make sure the total combined load of the speakers does not exceed 120W (COM12) 240W
(COM24). This is the maximum power the COM12 COM24 amplifier can give.

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Wire up the System
The COM12 COM24 amplifier is very easy to use. Following cable specs must be followed to
guarantee a correct operation:
1. Speaker cable for amplified zone output 4ohm: minimum 2x1.5 mm2 (distance >15m:
2x2.5mm2)
2. Music sources and other line level inputs: must be connected with audio cable of good quality

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Additional Information COM12/COM24
Technical specifications
COM12 COM24
Sensitivity
Balanced Microphone Channels -50dB±3dB
Balanced Line Channels -22dB±3dB
Balanced Remote Microphone station -50dB±3dB
Balanced Telephone Pa in -21dB±3dB
Unbalanced Link In -17dB±3dB
Unbalanced Amp In -0dB±3dB
Frequency Response (1Watt from speaker output
tap. 100Hz-10kHz)
+1.5dB / -3dB
THD+N by 1 kHz Less than 0.5%
Si nal to Noise ratio 90 dB@1kHz
Phantom Power +15V DC
Zone outputs 1-5 100V
Output level & impedance 100V – 83 ohm
70V – 42 ohm
25V – 5,2 ohm
4 ohm – 22V
100V – 42 ohm
70V – 21 ohm
25V – 2,6 ohm
4 ohm – 31V
Power Supply 235V AC, 50-60Hz
Max. power consumption 170W 260W
Wei ht 9.76 k 8,5 k
Dimensions (W x H x D) 420 mm x 88mm x 320mm
Unit hei ht 2HE
Chapter
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Personal notes