AUDAC D2 Installation and operating instructions

PROFESSIONAL AUDIO EQUIPMENT
Dual Channel Power Amplifier D2 – D3 – D4 – D5
User Manual &
Installation Guide
Power Amplifier
D2 – D3 – D4 – D5
AUDAC

AUDAC PROFESSIONAL AUDIO EQUIPMENT
User Manual & Installation Guide
AUDAC
http://www.audac.be
[email protected]

2
INTRODUCTION.....................................................................................................................................................................................................................3
ENVIRONMENT......................................................................................................................................................................................................................4
SAFETY REQUIREMENTS...................................................................................................................................................................................................5
CAUTION –SERVICING......................................................................................................................................................................................................5
OVERVIEW FRONT AND REAR PANEL..........................................................................................................................................................................6
FRONT PANEL OVERVIEW ...............................................................................................................................................................................................6
FRONT PANEL DESCRIPTION...........................................................................................................................................................................................6
REAR PANEL OVERVIEW..................................................................................................................................................................................................7
REAR PANEL DESCRIPTION.............................................................................................................................................................................................7
CONNECTING THE AMPLIFIER........................................................................................................................................................................................9
INPUT CONNECTIONS........................................................................................................................................................................................................9
OUTPUT CONNECTIONS..................................................................................................................................................................................................11
CONNECTION STANDARDS............................................................................................................................................................................................12
ADDITIONAL INFORMATION..........................................................................................................................................................................................13
TECHNICAL SPECIFICATIONS .......................................................................................................................................................................................13
PERSONAL NOTES...............................................................................................................................................................................................................14
Index

3
Introduction
This section briefly describes the possibilities of the D-Series Dual Channel Power
Amplifiers.
he D-Series Dual Channel Power Amplifiers are developed as an easy to use, flexible
flexible solution for multifunctional use.
During the development of the D2 – D3 – D4 – D5 power amplifier, the AUDAC-engineers
wanted to achieve three goals:
-Easy to use
-Excellent sound quality
-Modern and advanced design
AUDAC’s D-series professional power amplifiers are suitable for the most common low
impedance high power sound systems. The amplifiers are built as a 2 channel amplifier. The
amplifiers are equipped with a multipurpose protection circuit which detects DC malfunction,
short circuit, overheating and signal overload.
The amplifiers are equipped with a balanced XLR input and Speakon output connector for every
channel.
T

4
Environment
Do not place this unit in an enclosed environment such as a bookshelf or closet. Ensure
there is adequate ventilation to cool the unit. Do not block the ventilation openings.
Do not place the unit in environments which contain high levels of dust, heat, moisture or
vibration.
Do not use the unit near water or other liquids. Make sure no water or other liquids can be
spilled, dripped or splashed on the unit.
Do not place objects on top of the unit.
Place the unit on a stable base.
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Safety Requirements
Always handle the unit with care.
Only use a grounded socket outlet and a power cord with grounding plug.
This unit is not a toy. It should not be operated by children.
Do not stick objects through the openings of the D2 – D3 – D4 – D5.
Do not open the unit (risk for electrical shock).
Always read the user manual before getting started.
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


6
Overview front and rear panel
Front panel overview
Description
1. Power switch:
By means of the power switch, the amplifier can be turned ON and OFF. When the amplifier is
switched on, the blue LED located next to the power button will illuminate.
2. Gain control knobs:
These rotary gain control knobs allow you to adjust the level for each individual channel.
3. Indicator LED’s:
These LED’s indicate the operation of the amplifier. There are three LED’s provided. A signal
indicator, a Clip indicator, and a Protect indicator. The green signal indicator LED will illuminate
when a signal is available on the corresponding channel. The yellow clip LED will illuminate when
the channels output is being overdriven, and the red protection indicator will illuminate when the
protection circuit of the corresponding channel is activated. The protection circuit will intervene
during the startup procedure of the amplifier, when a problem occurs. The output signal will be
interrupted when this LED is lit.
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1. Power Switch
2. Gain controls: 3. Indicator LED’s

7
Rear panel overview
Description
4. Power inlet:
The mains power supply (230~240V / 50~60 Hz) has to be applied to this AC power inlet. The
connection is made by an IEC power connector and is fitted with a fuse. When replacing the fuse,
make sure the value of the replacement fuse matches the value of the original fuse.
(T6.3AL/250V for D2, T8AL/250V for D3, T10AL/250V for D4 & T12AL/250V for D5)
5. Loudspeaker connections:
The loudspeakers should be connected to these output connectors. The loudspeaker output
connections are performed using Speakon connectors. For standard stereo applications, the
loudspeakers should be connected to the +1 and -1 terminals of the Speakon connectors. More
information about the connection possibilities can be found in the next chapter, connecting the
amplifier.
6. Input connections:
The input connections of the amplifier are performed using balanced XLR connectors. Every
channel has an XLR input connector whereto the signal coming from the source should be
connected. The wiring should be done according to international standards. (Pin 1: Ground, Pin 2:
Hot (Signal +), Pin 3: Cold (Signal -))
4.
A
C
p
ower inlet with fuse
5. Louds
p
eaker connections
7. O
p
eration mode switch6. In
p
ut connections
8. Ground lift switch

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7. Operation mode switch:
By means of this switch, the operation mode of the amplifier can be selected between stereo mode
or bridge mode. For most standard applications the amplifier will be used in stereo mode whereby
this switch should be turned to the left position. When using in bridged mode, the power of both
channels will be merged with each other and this switch should be turned to the right position.
8. Ground lift switch:
By means of this switch, the ground of the amplifier can be detached to interrupt ground loops.
This can be useful when unwanted hum and buzz is caused by current flow along the cable shield
between different devices.

9
Connecting the Amplifier
Input connections
The input connections of the amplifier are performed using balanced XLR connectors. Every
channel has an XLR input connector. The input signal from the signal source, pre-amplifier or
mixer should be connected to the XLR input connections.
By means of the operation mode switch, the operational mode for the amplifier can be selected
between Stereo mode and Bridge mode. The diagrams below show the connection possibilities for
both Stereo and Bridge mode.
1) Stereo Mode:
This is the default mode of how the amplifier is set in the factory, and will be the
most common used setting for most applications (Left position of the switch).
Connect both outputs from the stereo signal source to the Channel 1 and Channel 2
XLR input connectors of the amplifier.
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2) Bridge mono Mode:
In bridged mono mode, the power of both output channels is merged to deliver
double the power to one single load. The operation mode switch should be
positioned in the Bridge position (Right position of the switch).
The output of the signal source should only be connected with the Channel 1 XLR
input connector of the amplifier.
For more information about how the loudspeakers should be connected in bridge
mode, refer to the “Output Connections” section of this user manual.

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Output connections
The loudspeaker connections are performed by using Speakon connectors. The loudspeakers
should be connected to the corresponding Speakon connector.
The used Speakon connectors are 4-pole versions. At the contacts of Speakon 1 (Channel 1), are
the output signals available for both output channels. Contacts +1 and -1 contain the signal for
output Channel 1, while contacts +2 and -2 contain the signal for output Channel 2. The contacts
of Speakon 2 (Channel 2) only contain the signals of Channel 2, which are available on contacts
+1 and -1.
S
p
eakon 1
(
Channel 1
)
S
p
eakon 2
(
Channel 2
)
Pin +1 Channel 1 + Channel 2 +
Pin -1 Channel 1 - Channel 2 -
Pin +
2
Channel 2 + n/
c
Pin -
2
Channel 2 - n/
c
1) Stereo Mode:
Stereo mode will be the most common operation method for this amplifier. The
loudspeakers of each channel can be connected with a separate two-core
connection cable. (or one four-core connection cable, carrying both signals for
Channel 1 and Channel 2 when connecting by connector Speakon 1)

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2) Bridge mono Mode:
When the amplifier is switched in bridge mode, there will be one single load
connected to the amplifier outputs. This load should be connected between the +
terminal of Channel 1 and the + terminal of Channel 2. This can be done by
connecting the loudspeaker between the +1 and +2 terminals of Speakon
connector one.
Connection standards
The in- and output connections of AUDAC audio equipment are performed corresponding to
international wiring standards for professional audio equipment.
XLR:
1 = ground / shield
2 = +sig
3 = -sig
XLR female:
XLR male:

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Additional Information
Technical specifications
Input Impedance 20 kΩbalanced
Input Sense 0.775 V
Frequency Response 20 Hz – 20 kHz
THD+N (1 kHz) Less than 0.05% @ 8 Ω
Signal to Noise ratio >93 dB
Slew Rate 40V/µsec
Cross Talk (1 kHz) >70 dB @ 8 Ω
Damping Factor D2 – D3 >200
Damping Factor D4 – D5 >400
RMS Power @ 8 ΩD2 2 x 200 W
RMS Power @ 4 ΩD2 2 x 300 W
RMS Power @ 8 ΩBridged D2 1 x 600 W
RMS Power @ 4 ΩBridged D2 n/a
RMS Power @ 8 ΩD3 2 x 300 W
RMS Power @ 4 ΩD3 2 x 450 W
RMS Power @ 8 ΩBridged D3 1 x 900 W
RMS Power @ 4 ΩBridged D3 1 x 1200 W
RMS Power @ 8 ΩD4 2 x 400 W
RMS Power @ 4 ΩD4 2 x 600 W
RMS Power @ 8 ΩBridged D4 1 x 1200 W
RMS Power @ 4 ΩBridged D4 1 x 1600 W
RMS Power @ 8 ΩD5 2 x 500 W
RMS Power @ 4 ΩD5 2 x 750 W
RMS Power @ 8 ΩBridged D5 1 x 1500 W
RMS Power @ 4 ΩBridged D5 1 x 2000 W
Protection
DC, Short Circuit, Overheating, Overload
Power Supply 230V AC, 50-60Hz
Weight D2 21.3 kg
Weight D3 22.7 kg
Weight D4 24.0 kg
Weight D5 26.0 kg
Dimensions (W x H x D) 483 mm x 88mm x 495 mm
Unit height 2HE
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Personal Notes