AUDAC DPA152 Installation and operating instructions

PROFESSIONAL AUDIO EQUIPMENT
DPA152/252 Dual Channel Class-D Amplifier
User Manual &
Installation Guide
DPA152/252
A
U
DA
C

AUDAC PROFESSIONAL AUDIO EQUIPMENT
User Manual & Installation Guide
AUDAC
http://www.audac.eu
[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........................................................................................................................................................................................8
INPUT CONNECTIONS........................................................................................................................................................................................................8
OUTPUT CONNECTIONS..................................................................................................................................................................................................10
CONNECTIONS STANDARDS..........................................................................................................................................................................................11
BLOCK DIAGRAM ...............................................................................................................................................................................................................12
ADDITIONAL INFORMATION..........................................................................................................................................................................................13
TECHNICAL SPECIFICATIONS .......................................................................................................................................................................................13
PERSONAL NOTES...............................................................................................................................................................................................................14
Index

3
Introduction
This section briefly describes the possibilities of the DPA152/252 Class-D Power
Amplifiers.
he DPA series amplifiers are digital power amplifiers designed to meet the specialized
needs of sound contractors. They are designed in six different models of Class D
power amplifiers, divided in three different architectures to meet the requirements
for all kinds of applications.
They combine the best of all features in one single series of amplifiers, providing an
outstanding sound quality with all the known advantages of Class D Amplifiers. Such as the
excellent efficiency and very low heat dissipation. And due to the complete passively cooled
entity only a minimal of maintenance is needed, while ensuring maximum reliability.
The small size of a single rack space make them very interesting for fixed rack mount as well
as mobile applications.
The DPA152/252 is built as a two channel (Stereo) amplifier, with various specific features
and advanced protection circuitry which protects against DC malfunctioning, short circuit,
overheating and overload.
The signal input connections are accommodated with balanced XLR connectors and signal
link through with other amplifiers is possible using the XLR output connectors. The
operation mode can be selected between Stereo mode, Bridge mode and Parallel mode.
The output connections are accommodated with both Speakon and Euro-Terminal blocks
T

4
Environment
Do not place this unit in an enclosed environment such as a bookshelf or closet. Ensure
that there is adequate ventilation to cool the unit.
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.
This unit was developed for indoor use only. Do not use it outdoors.
Do not place objects on top of the unit.
Place the unit on a stable base or mount it in a stable 19” rack.
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5
Safety Requirements
Always handle the unit with care.
Only use a grounded socket outlet and a power cord with grounding plug to plug in the
unit.
This unit is not a toy. It should not be operated by children.
Do not stick objects through the openings.
Do not open the unit (risk for electrical shock).
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: 19



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 above 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’s will light up
when the input channel exceeds -20 dBu. The yellow clip LED’s will illuminate when the channel’s
output is being overdriven, and the two red protect indicators illuminate when the thermal
compression begins, or any fault is detected.
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1. Power Switch
3. Indicator LED’s
2. Gain controls:

7
Rear panel overview
Description
4. Power inlet:
The mains power supply (110~240V AC / 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 that the value of the replacement fuse matches the value of the original fuse.
(T4AL/250V for DPA 152 & T6H/250V for DPA252)
5. Loudspeaker connections:
The loudspeaker connections are performed in two different ways. Every channel has Speakon and
euro terminal block output connections. In this way, the connections can be always made on the
most simple way for every application.
A detailed description about the best method for connecting the loudspeakers for every application
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 and a XLR link output connector. The input signal from the
signal source, pre-amplifier or mixer should be connected to the XLR input connections. And by
means of the XLR link output connectors, the signal can be linked through to multiple amplifiers.
7. Operation mode switch:
By means of this switch, the operation mode of the amplifier can be selected between standard
stereo mode, parallel mode and bridge mode. For standard stereo applications, this switch should
be turned to center position for “Stereo” mode.
4.
A
C
p
ower inlet with fuse
5. Louds
p
eaker connections 7. O
p
eration mode switch:
6. In
p
ut connections

8
Connecting the Amplifier
Input connections
The input connections of the amplifier are performed using balanced XLR connectors. Every
channel has an XLR input connector and a XLR link output connector.
The input signal from the signal source, pre-amplifier or mixer should be connected to the XLR
input connections. And by means of the XLR link output connectors, the signal can be linked
through to multiple amplifiers.
Between the input signal connections of the both channels is an operational mode switch provided.
By means of this switch, the operational mode of the amplifier can be selected. There are three
different operational modes available:
1) Stereo Mode:
This is the default mode how the amplifier is set in the factory, and will be the most
common used setting for most applications (Center 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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9
2) Bridge mono Mode:
In bridged mono mode, the power of both output channels is merged to deliver
double the power to one single 8 Ohm load. The mode selection switch should be
positioned in the Bridge position (Left 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.
3) Parallel Mode:
In parallel mode (Right position of the switch), the amplifier is configured in a way
that only the signal applied to the XLR input connector of Channel 1 will be used,
and will be amplified by both output channels.
The output level of both channels can be individually controlled by means of the
rotary controls on front of the amplifier.

10
Output connections
The loudspeaker connections are performed in two different ways. Every channel has Speakon and
euro terminal block output connections. In this way, the connections can be always made on the
most simple way for every application.
The used Speakon connectors are 4-pole versions. At the contacts of
Speakon 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 the signal contain for output Channel 2. The contacts
of Speakon 2 only contain the signals of Channel 2, which are available
on contacts +1 and -1.
1) Stereo Mode:
Stereo mode will be the most commonly 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 Speakon connectors.)
Depending of the most suitable solution, the loudspeakers can be connected by
both Speakon and Euro Terminal Block connectors. When connecting the
loudspeakers by Speakon connectors, the conductors should be connected to
terminals +1 and -1 of the connector and when connecting the loudspeakers by
means of the Euro Terminal Blocks, just connect the conductors to the + and –
terminals of the corresponding output channel.

11
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. Or when using the Euro Terminal connection blocks, the
loudspeaker should be connected between the + terminal of Channel 1 and the –
terminal of Channel 2.
3) Parallel Mode:
When the amplifier is switched in parallel mode, the connections for the
loudspeakers should be made in the same way as Stereo mode.
Note
Do not connect any 100V line transformers to the loudspeaker outputs of the amplifier.
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:

12
Block Diagram
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13
Additional Information
Technical specifications
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DPA152 DPA252
Performance
Rated power
(1 kHz, THD 1%)
Stereo @ 8 Ohm 80 Watt 130 Watt
Stereo @ 4 Ohm 150 Watt 250 Watt
Brid
g
e @ 8 Ohm 300 Watt 500 Watt
Input Sensitivity
(
Im
p
edance 20 kOhm
)
+ 4 dBu
Fre
q
uenc
y
res
p
onse
(
± 1 dB
)
20 Hz – 20 kHz
Si
g
nal to Noise ratio > 100 dB
Dam
p
in
g
factor
(
8 Ohm, 400 hz
)
>200
Channel se
p
aration >70 dB
THD at 1 kHz
(
1/2 rated
p
ower
)
Less than 0.1%
Operation Temperature / Humidity at
non condensin
g
0° ~ 40°C at 95% Humidity
Indicators Protect
(
DC, Thermal, Overload
)
Cli
p
(
0 dBr
)
Si
g
nal
(
-26 dBr
)
Power su
pp
l
y
110~240V AC / 50~60 Hz
Construction
Construction Steel
Coolin
g
Convection cooled
Mounting 19” Rack
Unit Hei
g
ht 1 HE
Dimensions
(
W x H x D
)
482 x 44 x 330 mm
Color Black
Net Wei
g
ht 4.37 K
g
4.77 K
g

14
Personal notes

1
PROFESSIONAL AUDIO EQUIPMENT
DPA152/252 2-Kanal D-Klasse Verstärker
Bedienungs- und
Installationsanleitung

2
AUDAC PROFESSIONAL AUDIO EQUIPMENT
Bedienungs- und Installationsanleitung
AUDAC
http://www.audac.eu
[e-mail]

3
Inhalt
EINLEITUNG..................................................................................................................................................................................................4
UMGEBUNG ...................................................................................................................................................................................................5
SICHERHEITSHINWEISE ...........................................................................................................................................................................6
WARNUNG –WARTUNG ................................................................................................................................................................................................6
ÜBERBLICK FRONTBLENDE UND GERÄTERÜCKSEITE..................................................................................................................7
ÜBERBLICK FRONTBLENDES......................................................................................................................................................................................7
BESCHREIBUNG.................................................................................................................................................................................................................7
ÜBERBLICK GERÄTERÜCKSEITE...............................................................................................................................................................................8
BESCHREIBUNG.................................................................................................................................................................................................................8
DER VERSTÄRKER ANSCHLIEΒEN .........................................................................................................................................................9
EINGANGSANSCHLÜSSE................................................................................................................................................................................................9
AUSGANGSVERBINDUNGEN.................................................................................................................................................................................... 11
VERBINDUNGSRICHTLINIEN................................................................................................................................................................13
ZUSÄTZLICHE INFORMATIONEN ........................................................................................................................................................15
NOTIZEN ......................................................................................................................................................................................................16

4
Einleitung
Dieser Abschnitt gibt einen kurzen Überblick über die Ausstattungsmerkmale des DPA152/252 starken D-
Klasse Verstärkers.
ie digitale DPA Serien sind kraftvolle Verstärker die entwickelt sind um an den
beruflichen Anforderungen des Vertragspartners zu entsprechen. Sie sind entwickelt in
6 verschiedene Modelle des starken D-Klasse Verstärkers, verteilt in 3 verschiedene
Stile um an den Anforderungen der verschiedenen Anwendungen zu entsprechen.
Sie kombinieren die beste aller Eigenschaften in eine einzige Serie von Verstärkern. Sie bieten
eine ausgezeichnete Tonqualität mit all den bekannten Vorteilen der D-Klasse Verstärker. Wie
die ausgezeichnete Effizienz und eine sehr geringe Wärmeabfur. Dank die Komplette passiv
gekühlte Einheit ist nur ein Minimum von Wartung nötig während ein Maximum von
Zuverlässigkeit versichert wurde.
Das kleine Format des Raumes ein einfaches Gestell macht sie noch interessanter für festen oder
mobilen Gebrauch.
Der DPA 152-252 ist aufgebaut auf ein Verstärker mit einem 2 (Stereo) Kanal, die verschiedenen
spezifischen Eigenschaften und ein fortschrittliches Sicherungssystem hat das schützt gegen DC-
Störungen, einen kurzer Kreis, Überhitzung und Überbelastung.
Die Verbindungen des Signaleingangs und der Signalverbindungen sind ausgestattet mit
balancierten XLR-Anschlüssen wodurch man XLR-Ausgangsanschlüsse verbinden kann mit
anderen Verstärkern. In dem Wirkungsmodus können Sie wählen zwischen dem Stereo Modus,
Bridge Modus und dem Parallel Modus.
Die Ausgangverbindungen sind ausgestattet mit sowohl Speakons und Klemmenblocks.
D

5
Umgebung
Stellen Sie den Apparat nicht in einer abgeschlossenen
Umgebung wie ein Büchergestell oder einen Schrank. Sorgen
Sie für ausreichende Ventilation um den Apparat ab zu kühlen.
Stellen Sie diesen Apparat nicht in einer Umgebung wo es viel
Staub, Hitze, Feuchtigkeit oder Vibration gibt.
Benutzen Sie den Apparat nicht dicht zu Wasser oder andere
Flüssigkeiten. Sorgen Sie dass kein Wasser oder andere Flüssigkeiten auf den Apparat
gekleckert, getropft oder gespritzt werden.
Dieser Apparat wurde entwickelt nur für Gebrauch im Hause. Benutzten Sie es nicht
auβer Hause.
Stellen Sie keine Gegenstände auf den Apparat.
Stellen Sie das Apparat auf eine feste Basis oder montieren Sie es in einem 19” Gestell.