XTA DPA SERIES User manual

Page2 DPASeries—DPA80/DPA100 Operating Instructions
ta
x

DPA Series — DPA80/DPA100 Operating Instructions Page 3
t
a
x
CONTENTS
DECLARATION OF CONFORMITY........................................................................ 6
THANKS................................................................................................................7
INTRODUCTION....................................................................................................7
IMPORTANT SAFETY INSTRUCTIONS ................................................................ 8
INSTRUCTIONS DE SECURITE IMPORTANTES .................................................. 9
Installing Your Amplifier: Unpacking ............................................................... 10
Additional Symbols and Warnings.......................................................................................... 10
Installing Your Amplifier: Electrical Considerations.........................................11
Installing Your Amplifier: Mechanical Considerations..................................... 12
Installing Your Amplifier: RF Emissions .......................................................... 12
About Your Amplifier: Dynamic Amplifier Performance Measurements ........ 13
Connecting To Your Amplifier: Line Inputs and Outputs..................................14
Connecting To Your Amplifier: Speaker Outputs.............................................. 15
Connecting To Your Amplifier: Bridged (Mono) Operation...............................16
Operating Your Amplifier: Front Panel Controls and Indicators...................... 17
Operating Your Amplifier: Rear Panel Sockets and Switches ......................... 19
Operating Your Amplifier: Initial Set-up and Switching On..............................20
Switching On….........................................................................................................................20
Inside Your Amplifier: DSP Layout, Configurations and Routing ..................... 21
Source Choices and Selection ................................................................................................22
Input Processing Channels.....................................................................................................23
Mix Matrix Section...................................................................................................................23
Power Amplifier and Auxiliary Output Processing Channels.................................................24
Independent Network Audio Outputs .....................................................................................25
Operating Your Amplifier: Understanding the Metering..................................26
LED Meters .............................................................................................................................26
On-Screen Meters...................................................................................................................27
Operating Your Amplifier: Directly Editing Audio Parameters ....................... 28
Overview..................................................................................................................................28
Input Gain................................................................................................................................29
Input Delay ..............................................................................................................................29
Input Parametric EQ Bands 1 through 8.................................................................................30
Output Gain ............................................................................................................................. 31
Output Polarity ........................................................................................................................ 31
Output Delay............................................................................................................................ 31
Output High Pass Filter ..........................................................................................................32
Output Low Pass Filter ...........................................................................................................32
Output Parametric EQ Bands 1 through 9 ..............................................................................33
Output Limiters: Program Limiter ........................................................................................34
Output Limiters: Peak Limiter...............................................................................................34
Output Matrix Gains ................................................................................................................35

Page4 DPASeries—DPA80/DPA100 Operating Instructions
t
a
x
Operating Your Amplifier: Advanced Editing Features ....................................36
Overview..................................................................................................................................36
Selecting Available Sources (Analogue, AES, Network Audio) ..............................................36
Switching from Analogue to AES Sources..............................................................................37
Choosing Sources to Route to Input Processing Channels....................................................38
Changing Network Output Source..........................................................................................39
Changing Crossover Configuration......................................................................................... 41
Using Free Assign Mode.........................................................................................................42
Bridged Mode for Output Pairs...............................................................................................43
Resetting Audio Parameters ..................................................................................................45
Ganging Channels for Editing .................................................................................................45
Operating Your Amplifier: Storing and Recalling Settings.............................. 47
Memory Overview....................................................................................................................47
Storing a Memory….................................................................................................................48
Recalling a Memory… .............................................................................................................49
Operating Your Amplifier: System Adjustments ..............................................50
Overview..................................................................................................................................50
Operating Your Amplifier: Remote Control ...................................................... 51
Overview.................................................................................................................................. 51
Remote Control Software Choices.......................................................................................... 51
Configuration of the Remote Interface...................................................................................52
Wireless Connection with DeltaDirect iPad App ....................................................................57
Operating Your Amplifier — Security and Preset Locking ................................ 58
Overview..................................................................................................................................58
Locking the Front Panel .........................................................................................................59
Unlocking Procedure ..............................................................................................................59
Operating Your Amplifier: Resetting Back to Defaults & Clearing Security... 60
Default Settings ......................................................................................................................60
Entering Start-up Control Codes ............................................................................................60
Clearing Security — Forgotten Unlock Code .......................................................................... 61
Looking After Your Amplifier: Maintenance .....................................................62
Looking After Your Amplifier: Warranty...........................................................62
Performance Of Your Amplifier: Specifications ...............................................63

DPA Series — DPA80/DPA100 Operating Instructions Page 5
t
a
x
Appendix I: Limiters and How to Set Them Correctly ..................................... 66
Program Limiter .....................................................................................................................66
Peak Limiter............................................................................................................................67
Setting Accurate Limiter Thresholds — Program Limiter......................................................70
Amplifier Outputs’ Program Limiter Lookup Table ............................................................... 71
Auxiliary Outputs’ Program Limiter Lookup Table ................................................................72
Setting Accurate Limiter Thresholds — Peak Limiter ............................................................73
Setting Appropriate Attack and Release Times .....................................................................73
Appendix II: Upgrading Firmware and Loading Presets ..................................75
Amplifier Communications Set-up .........................................................................................75
Download the Files .................................................................................................................75
Connect To The Amplifier .......................................................................................................76
Choose What To Load..............................................................................................................76
Start The Update!....................................................................................................................77
What If It All Goes Wrong… .....................................................................................................77

Page 6 DPA Series — DPA80/DPA100 Operating Instructions
t
a
x
DECLARATION OF CONFORMITY
We, the manufacturer:
XTA Electronics Limited,
The Design House
Vale Business Park
Worcester Road
Stourport on Severn
Worcestershire
England
DY13 9BZ
acknowledge our responsibility that the following products:
Kind of equipment: Audio amplifier
Commodity Code: 8518408099
Type Designation: DPA80, DPA100
and all OEM variants of these models
are manufactured:
in accordance with EMC Directive 2004/108/EC,
in compliance with the following norm(s) or document(s):
Technical Regulations: EN55103-1:1996, EN55103-2:1996
and
in accordance with the Low Voltage Directive 2006/95/EC,
in compliance with the following norm(s) or document(s):
Technical Regulations: EN/IEC60065:2002 7th Edition
Signed: ……………………………………………………………………
Name: Alex Cooper
Position: Research and Development Manager
Date: June 2017

DPA Series — DPA80/DPA100 Operating Instructions Page 7
t
a
x
THANKS
Thank you for choosing a DPA Series amplifier for your application.
Please spend a little time reading through this manual, so that you obtain the best possible
performance from the unit and become familiar with its operating requirements.
All XTA products are carefully designed and engineered for cutting-edge performance and
world-class reliability. If you would like further information about this or any other XTA
product, please contact us.
We wish you many years of service from this amplifier and look forward to hearing from you
in the near future.
INTRODUCTION
The DPA Series has been designed to combine incredible audio power and performance with
ultra-flexible connectivity for both remote control and audio. Exemplary audio processing is
assured through the use of XTA’s DSP platform, and power amplifier capabilities are taken
care of with high efficiency output stages and a generous power supply.
Accepting analogue, AES3 digital and optional Dante networked audio, the DPA Series can
connect to any source and make it available over the network, as well as processing four
additional channels with local analogue outputs to connect to non-DSP Delta amplifiers.
These auxiliary processed outputs can also be fed onto the network, and used by non-DSP
DNA Series (and MC2Delta Series) amplifiers that have Dante cards fitted, or by any other
Dante enabled device.
Connectivity for remote control is covered by USB, Ethernet and RS485, with relay of either
USB or Ethernet control via RS485 to work with legacy products. Configuration of the
amplifier’s processing is through the industry standard AudioCore application, with tuning
and monitoring of a network of DPA and Delta DSP amplifiers handled wirelessly by the
dedicated DeltaDirect iPad app.
With a range of power levels available in the DPA Series, the non-DSP amplifiers can be
networked to a single DPA model, creating a powerful, efficient system that’s easy to expand
and adapt for use in live, install and everything in between.

Page 8 DPA Series — DPA80/DPA100 Operating Instructions
t
a
x
IMPORTANT SAFETY INSTRUCTIONS
CAUTION: RISK OF ELECTRIC SHOCK.
DO NOT OPEN
WARNING: Apparatus with CLASS I construction shall be connected to a MAINS socket outlet with a protective
earthing connection.
WARNING: To prevent injury, this apparatus must be securely attached to the rack in accordance with the
installation instructions.
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with a dry cloth.
7. Do not block any ventilation openings, install in
accordance with the manufacturer’s instructions.
8. Do not install near any heat sources, such as
radiators, heat registers, stoves or other apparatus
(including amplifiers) that produce heat.
9. Do not defeat the safety purpose of the polarized or
grounding-type plug. A polarized plug has two blades
with one wider than the other. A grounding-type plug
has two blades and a third grounding prong. The wide
blade or the third prong are provided for your safety. If
the provided plug does not fit into your outlet, consult
an electrician for replacement of the obsolete outlet.
10. Protect the power cord from being walked on or
pinched particularly at plugs, convenience
receptacles and the point where they exit from the
apparatus.
11. Only use attachments/accessories specified by the
manufacturer.
12. Use only with the cart, tripod, bracket or
table specified by the manufacturer, or sold with the
apparatus. When a cart is used, use caution when
moving the cart/apparatus combination to avoid injury
from a tip over.
13. Unplug this apparatus during lightning storms or
when unused for a long period of time.
14. Refer all servicing to qualified service personnel.
Servicing is required when the apparatus has been
damaged in any way, such as if the power-supply cord or
plug is damaged, liquid has been spilled or objects have
fallen into the apparatus, the apparatus has been
exposed to rain or moisture, does not operate normally,
or has been dropped.
15. Do not expose this equipment to dripping or
splashing and ensure that no objects filled with liquids,
such as vases, are placed on the equipment.
16. To completely disconnect this equipment from the
AC mains, disconnect the power cord from the mains
circuit breaker.
17. This unit is fitted with a 3-wire power cord. For
safety reasons, THE EARTH LEAD SHOULD NOT BE
DISCONNECTED IN ANY CIRCUMSTANCE.
18. Correct disposal of this product: This symbol
indicates that this product must not be disposed of with
household waste, according to the WEEE Directive
(2012/19/EU) and your national law. This product should
be taken to a collection center licensed for the recycling
of waste electrical and electronic equipment (EEE). The
mishandling of this type of waste could have a possible
negative impact on the environment and human health
due to potentially hazardous substances that are
generally associated with EEE. At the same time, your
cooperation in the correct disposal of this product will
contribute to the efficient use of natural resources. For
more information about where you can take your waste
equipment for recycling, please contact your local city
office, or your household waste collection service.
The lightning flash with arrowhead
symbol within an equilateral triangle is
intended to alert the user to the presence
0f uninsulated “dangerous voltage”
within the product’s enclosure that may
be of sufficient magnitude to constitute a
risk of electric shock to persons.
The exclamation mark within an
equilateral triangle is intended to alert
the user of important operating and
maintenance (servicing) instructions in
the literature accompanying the
appliance.

DPA Series — DPA80/DPA100 Operating Instructions Page 9
t
a
x
INSTRUCTIONS DE SECURITE IMPORTANTES
ATTENTION: RISQUE DE CHOC ELECTRIQUE.
NE PAS OUVRIR
ATTENTION: Appareils de construction de CLASSE I doit être raccordé au réseau électrique via une prise de courant
reliée à la terre.
ATTENTION: Pour éviter toute blessure, cet appareil doit être solidement fixé à la torture, conformément aux
instructions d'installation.
1. Lisez ces consignes.
2. Conservez ces consignes.
3. Respectez tous les avertissements.
4. Respectez toutes les consignes d’utilisation.
5. N’utilisez jamais l’appareil à proximité d’un liquide.
6. Nettoyez l’appareil avec un chiff on sec.
7. Veillez à ne pas empêcher la bonne ventilation de
l’appareil via ses ouïes de ventilation. Respectez les
consignes du fabricant concernant l’installation de
l’appareil.
8. Ne placez pas l’appareil à proximité d’une source de
chaleur telle qu’un chauff age, une cuisinière ou tout
appareil dégageant de la chaleur (y compris un ampli de
puissance).
9. Ne supprimez jamais la sécurité des prises bipolaires
ou des prises terre. Les prises bipolaires possèdent deux
contacts de largeur diff érente. Le plus large est le contact
de sécurité. Les prises terre possèdent deux contacts plus
une mise à la terre servant de sécurité. Si la prise du bloc
d’alimentation ou du cordon d’ali-mentation fourni ne
correspond pas à celles de votre installation électrique,
faites appel à un électricien pour eff ectuer le changement
de prise.
10. Installez le cordon d’alimentation de telle façon que
personne ne puisse marcher dessus et qu’il soit protégé
d’arêtes coupantes. Assurez-vous que le cordon
d’alimentation est suffisamment protégé, notamment au
niveau de sa prise électrique et de l’endroit où il est relié à
l’appareil; cela est également valable pour une éventuelle
rallonge électrique.
11. Utilisez exclusivement des accessoires et des appareils
supplémentaires recommandés par le fabricant.
12. Utilisez exclusivement des chariots, des
diables, des présentoirs, des pieds et des surfaces de
travail recommandés par le fabricant ou livrés avec le
produit. Déplacez précautionneusement tout chariot ou
diable chargé pour éviter d’éventuelles blessures en cas
de chute.
13. Débranchez l’appareil de la tension secteur en cas
d’orage ou si l’appareil reste inutilisé pendant une longue
période de temps.
14. Les travaux d’entretien de l’appareil doivent être eff
ectués uniquement par du personnel qualifié. Aucun
entretien n’est nécessaire sauf si l’appareil est endommagé
de quelque façon que ce soit (dommages sur le cordon
d’alimentation ou la prise par exemple), si un liquide ou un
objet a pénétré à l’intérieur du châssis, si l’appareil a été
exposé à la pluie ou à l’humidité, s’il ne fonctionne pas
correctement ou à la suite d’une chute.
15. N'exposez pas cet équipement au fait de tomber goutte à
goutte ou au fait d'éclabousser et garantissez qu'aucun objet
rempli des liquides, comme les vases, n'est placé sur
l'équipement.
16. Pour complètement débrancher cet équipement de la
conduite principale de courant alternatif, débranchez la
corde de pouvoir du disjoncteur de conduite principale.
17. Cette unité est correspondue avec une corde de pouvoir
de 3 fils. Pour les raisons de sécurité, L'AVANCE DE TERRE
NE DEVRAIT ÊTRE DÉBRANCHÉE DANS AUCUNE
CIRCONSTANCE.
18. Mise au rebut appropriée de ce produit: Ce symbole
indique qu’en accord avec la directive DEEE (2012/19/EU) et
les lois en vigueur dans votre pays, ce produit ne doit pas
être jeté avec les déchets ménagers. Ce produit doit être
déposé dans un point de collecte agréé pour le recyclage des
déchets d’équipements électriques et électroniques (EEE).
Une mauvaise manipulation de ce type de déchets pourrait
avoir un impact négatif sur l’environnement et la santé à
cause des substances potentiellement dangereuses
généralement associées à ces équipements. n même temps,
votre coopération dans la mise au rebut de ce produit
contribuera à l’utilisation efficace des ressources
naturelles. Pour plus d’informations sur ’endroit où vous
pouvez déposer vos déchets d’équipements pour le
recyclage, veuillez contacter votre mairie ou votre centre
local de collecte des déchets.
Le symbole représentant un éclair fléché
dans un triangle équilatéral a pour but
d’alerter l’utilisateur de la présence
d’une “tension dangeruese” non isolée à
l’intérieur du boitier, pouvant être d’une
force suffisante pour constituer un risqué
d’électrocution.
Le point d’exclamation dans un triangle
équilatéral a pour but d’alerter
l’untilisateur de la présence
d’instructions importantes concernant le
fonctionnement et la maintenance, dans
la documentation qui accompagne
l’appariel.

Page10 DPASeries—DPA80/DPA100 Operating Instructions
t
a
x
Installing Your Amplifier: Unpacking
After unpacking the unit, please check it carefully for any damage. If any is found,
immediately notify the carrier concerned - you, the consignee, must instigate any claim.
Please retain all packaging in case of future re-shipment.
THIS WAY UP
The Design House
Vale Business Park
Worcester Road
Stourport on Severn
Worcs.
England
Tel [phone]
Fax [phone]
Additional Symbols and Warnings
只有在高海拔地区使用不超过2000米。
Meaning of the symbol: Evaluation for apparatus only based on altitude not exceeding 2000m,
therefore it is the only operating condition applied for the equipment. There may be some potential
safety hazard if the equipment is used at altitude above 2000m.
只适合于非热带气候地区使用
Meaning of the symbol: Evaluation for the apparatus only based on temperate climate condition,
therefore it is the only operating condition applied for the equipment. There may be some potential
safety hazard if the equipment is used in tropical climate region,

DPA Series — DPA80/DPA100 Operating Instructions Page 11
t
a
x
Installing Your Amplifier: Electrical Considerations
The amplifier has been manufactured to comply with your local power supply requirements,
but before connecting the unit to the supply, ensure that the voltage (printed on the rear
panel) is correct.
The amplifier is fitted with either a 100/120V or 220/240V tapped transformer according to
customer requirements.
Make sure power outlets conform to the power requirements listed on the back of the unit.
Damage caused by connecting to improper AC voltage is not covered by the warranty.
SAFETY WARNING
Where a MAINS plug or appliance coupler is used as the disconnect device, it should remain
readily operable.
Where the amplifier is mounted in a rack and permanently connected to the mains, then the
rack should be installed with a readily accessible connector or an ALL POLE circuit breaker
with 3mm breaking distances.
For safety reasons,
THE EARTH LEAD SHOULD NOT BE DISCONNECTED IN ANY CIRCUMSTANCE.
If ground loops are encountered consult the section on connecting your amplifier on page 14.
The wiring colours are:
230V AREAS: EARTH = GREEN AND YELLOW
NEUTRAL=BLUE
LIVE=BROWN
DO NOT USE THE UNIT IF THE ELECTRICAL POWER CORD IS FRAYED OR BROKEN. The
power supply cords should be routed so that they are not likely to be walked on or pinched by
items placed upon or against them, paying particular attention to cords and plugs and the
point where they exit from the appliance.
ALWAYS OPERATE THE UNIT WITH THE AC GROUND WIRE CONNECTED TO THE ELECTRICAL
SYSTEM GROUND. Precautions should be taken so that the means of grounding of a piece of
equipment is not defeated.
DO NOT REMOVE THE LID. Removing the lid will expose you to potentially dangerous
voltages. There are no user serviceable parts inside.
ESD strikes to the unit’s front panel that are in excess of 4000 volts may cause disturbance to
the status LEDs on the unit. This will not affect audio performance and will be corrected on
the next power up cycle.

Page12 DPASeries—DPA80/DPA100 Operating Instructions
t
a
x
Installing Your Amplifier: Mechanical Considerations
To ensure that this equipment performs to specification, it should be mounted in a suitable
rack or enclosure as described below. Like all high power amplifiers, it should be kept away
from other equipment which is sensitive to magnetic fields. Also, this amplifier may suffer a
substantial reduction in performance if it is subjected to, or mounted close to equipment
which radiates high RF fields.
Warning: To prevent injury, this apparatus must be securely attached to the rack in
accordance with the installation instructions
When mounting the amplifier in a rack or enclosure:
Be aware that…
THE FRONT PANEL IS NOT CAPABLE OF SUPPORTING THE UNIT ON ITS OWN.
Make sure that the rear of the unit is adequately supported. The brackets which are supplied
fit standard 19 inch (483mm) rack mounting systems.
ENSURE THERE IS ADEQUATE VENTILATION.
The cooling fans suck cool air in through the front and blow hot air out at the rear of the unit
through the ventilating grills. The front and rear of the amplifier should have free exposure to
the air (i.e. in a rack leave the front & rear doors off), with 2cm air gap at the sides.
IF AIR IS NOT ALLOWED TO ESCAPE FROM THE REAR, OVER-HEATING WILL OCCUR.
Take care when mounting other equipment in the same rack.
Make sure that the rack unit has a separate earth connection (technical earth).
Please also see the notes regarding maintenance on page 62.
Installing Your Amplifier: RF Emissions
The high frequency resonant converters in the DPA Series amplifiers have been designed to
have very low radio frequency (RF) emissions; however even these low level emissions can
cause interference with other equipment.
In order for this to be minimised, the amplifier should be mounted in a metal rack enclosure,
which should have a separate (technical) Earth. Alternatively, a separate earth should be
attached to the amplifier at the rear rack mounting bracket.

DPA Series — DPA80/DPA100 Operating Instructions Page 13
t
a
x
About Your Amplifier: Dynamic Amplifier Performance Measurements
The DPA Series amplifiers are the very latest examples of a ‘dynamic amplifier’. This new
‘breed’ of power amplifiers provide very high peak power levels in a much smaller, and
lighter, package than previously possible with conventional amplifiers.
They are designed specifically for today’s high power audio installations, which use multiple
speakers with electronic crossovers or speaker controllers. These systems can handle very
high transient signals that far exceed their RMS power rating. The DPASeries amplifiers have
been designed to match this requirement and can deliver huge levels of power for short
durations.
In order to protect themselves and the loudspeakers that they are driving, continuous signals
such as sine waves, are automatically detected and reduced (ramped down) to a safe level.
When trying to measure the power output however, continuous signals will give totally
incorrect results. A dynamic signal, such as a tone burst, should be used and the levels
measured by monitoring the waveform on an oscilloscope. The power envelope can then be
accurately measured.
Our power output figures are measured using signals with known Crest Factors and are
quoted at the rear of this manual on page 63 and on our website.

Page14 DPASeries—DPA80/DPA100 Operating Instructions
t
a
x
Connecting To Your Amplifier: Line Inputs and Outputs
The inputs are made via 3-pin XLR connectors, which are electronically balanced and should
be connected via a high grade twin core screened cable, as follows:
PIN1: Screen (see note below)
PIN2: Hot (signal +)
PIN3: Cold (signal -)
The amplifier is designed to operate with fully balanced equipment and ground loops or loss
of performance may be experienced if connected to unbalanced sources. If it is unavoidable
however, the following wiring should be used. The cable should still be twin core plus screen.
PIN1: Screen - connected to the chassis of the unbalanced equipment - or left disconnected
at the unbalanced end.
PIN2: Hot (signal +)
PIN3: Cold (ground 0V)
NOTE: This amplifier is wired to the latest industry recommendations. PIN1 is connected
directly to the chassis/mains earth. If ground loops (mains hum) are encountered remove the
screen connection from the other end of the cable and leave it open circuit. If problems
persist, consult your dealer/supplier.
DO NOT TAMPER WITH OR ALTER ANY GROUND (EARTH) CONNECTIONSINSIDE THE
AMPLIFIER.
For bridged operation input should be made to channel A (or C) only and the channels set for
bridged mode for the appropriate pair of channels. Please see page 43 for details of how to
do this.
Outputs are also made via 3-pin XLR connectors wired as follows:
PIN1: Screen (see note above)
PIN2: Hot (signal +)
PIN3: Cold (signal -)
Note that the rear panel outputs are electronically balanced and so are not galvanically
(electrically) isolated. Front panel outputs are transformer balanced and so are isolated.
XLR
MALE
XLR
FEMALE

DPA Series — DPA80/DPA100 Operating Instructions Page 15
t
a
x
Connecting To Your Amplifier: Speaker Outputs
The speaker outputs are via Neutrik Speakon connectors. 2 pole (NL2FC) or 4 pole (NL4FC)
connectors can be used.
Pin 1+: Hot
Pin 1-: Cold
Additionally, Channel 1 Speakon connector carries Channel B2output on Pins +2 & -2 to allow
easy bi-amping or bridged operation using a single NL4 connector. Similarly, Channel 3’s
Speakon connector also carries Channel 4 output.
Output Connector 1
Pin 2+: Hot Ch. 2
Pin 2-: Cold Ch. 2
Output Connector 3
Pin 2+: Hot Ch. 4
Pin 2-: Cold Ch. 4
For bi-amped operation, connect as above.
There must be no shared connections between channels.
Negative output terminals must not be joined together as they are not both at ground
potential. Connecting them together will damage the amplifier and void the warranty!
As the currents involved are very high, and to ensure best performance, the speaker cables
should be kept as short as possible and conform to the following minimum requirements:
DPA80, 14A into 4 Ohm speaker loads
DPA100, 20A into 4 Ohm speaker loads
When operating the amplifier into loads of less than 4 Ohms, be aware that the current
capacity of the speaker cables will need to be increased above the values quoted here.
Do not connect the inputs/outputs to any other voltage source such as a battery, mains source
or power supply, regardless of whether the amplifier is turned on or off.
Do not run the output of any amplifier channel back into another channel’s input and do not
parallel or series-connect an amplifier output with any other amplifier output.
SPEAKON NL2 & NL4

Page16 DPASeries—DPA80/DPA100 Operating Instructions
t
a
x
Connecting To Your Amplifier: Bridged (Mono) Operation
Pairs of channels may be independently bridged — channel pair 1+2, and/or channel pair 3+4.
The method is the same for both channel pairs:
Select the required bridged mode through the front panel MENU system (see page 43 for
more information).
Use Channel 1 or 3’s Output Speakon connector and connect as follows:
Pin 2+: Hot
Pin 1-: Cold
When operating in bridged mode, the minimum impedances are doubled.
The minimum load in bridged mode is 4 ohms.

DPA Series — DPA80/DPA100 Operating Instructions Page 17
t
a
x
Operating Your Amplifier: Front Panel Controls and Indicators
1: USB Type “B”: Connect to a computer for remote control — a driver will be required.
Please see the section on remote control starting on page 50.
2: REMOTE LED: This will flash when the unit is being addressed under remote control.
3: AES IN LED: This illuminates if either AES input is switched in (replacing the respective
analogue input channel) and will flash if there is a loss of lock on either input. Note that this
does not mean AES is actually routed to the amplifier’s DSP, only that a rear panel socket is
set to receive an AES stereo signal.
4: NET. AUDIO LED: This will illuminate when an audio network connection is correctly made
to the amplifier. Note that this does not mean that any network audio channels are actually
routed to the amplifier’s DSP, only that the connection is available.
5: Main Display: By default this will display preset names and is used to show all parameter
information.
6: Meters Display: This screen shows context sensitive metering for either the available
analogue and digital inputs (In A-D Bank selected) or the feeds to the bank of either power
amplifier outputs or auxiliary outputs. See page 26 for more information.
7: PROTECTION LED: If a condition exists, either internally or externally, that could cause
damage to either the amplifier or the speakers, the protection circuit will disengage the
outputs and this LED will illuminate/flash.
Typical conditions that could cause the protection to be triggered include very high frequency
or subsonic input signals, DC in the inputs, short-circuited outputs, or internal high
temperatures.
The protection circuit can affect all channels or a ‘channel pair’ depending on the type of
fault. This is indicated by the combination of Protection LED illuminating and a corresponding
message on the LCD. In this way, it is possible for two channels (a channel pair) to remain
functioning even though a fault has caused the other channel pair to mute. A channel pair
would be 1+2 or 3+4.
Temperature related faults will reset automatically if the unit has cooled sufficiently. Output
short circuits will require manual reset after clearing the fault (switching off at the mains
switch and then on again after a few seconds). Short circuits on either channel of a channel
pair will only affect that channel pair.
4 5 67
9
12
14 13
15
2
10
3
11
8
1

Page18 DPASeries—DPA80/DPA100 Operating Instructions
t
a
x
8&9: BRIDGE pair LEDs: The channel pair LED will illuminate if these channels have been
switched into bridged (mono) mode. See page 14 for details of how to connect your speaker to
a bridged channel pair, and page 43 for how to enable bridge mode.
10: STANDBY Switch: The power amplifiers in the DPA Series can be powered down leaving
just the DSP active. Apart from the obvious power savings to be made, there may be
circumstances when only the DSP is required, such as utilizing it for braking analogue audio
channels onto a Dante network. This LED illuminates red when the power amplifier sections
are turned OFF.
11: MUTE keys: This will mute the respective input or output channel according to the current
setting of the bank control selection (#14).
12: Signal meters: Depending on the current bank selected (#14), these will be showing input
levels pre-DSP, output levels for the power amp channels, or output levels of the auxiliary
channels.
13: EDIT keys: First press on an EDIT key will show the gain for the selected channel within
its respective BANK. Second press will display the last edited parameter — see pages 29 to 31
for more info on full real-time editing of input and output parameters.
14: BANK Select keys: This key select inputs A-D, power amp outputs 1-4 or auxiliary outputs
5-8, for both meter displays, mute functions and during editing. Bank select will default to
showing power amp outputs on meters and mutes after 20 seconds of inactivity.
15: Rotary encoder and navigation keys: MENU is always the way under the bonnet of the
amplifier, and then BACK and NEXT to choose the Sub-Menu and ENTER to select the choice.
These controls are also used when editing DSP audio parameters, accessed via the EDIT
keys.
4 5 67
9
12
14 13
15
2
10
3
11
8
1

DPA Series — DPA80/DPA100 Operating Instructions Page 19
t
a
x
Operating Your Amplifier: Rear Panel Sockets and Switches
1: Fan outlet: The variable speed fans suck air in through the front vents and out through the
back of the amplifier. Please see maintenance on page 62 for recommendations on how to
clean this and the front foam sections.
2: Channel A output Speakon socket: Normal output is on pins 1+ hot, 1- cold. Channel B’s
output is also wired to this socket to enable a single NL4 to provide both channels and to
facilitate easier wiring in bridged mode. Channel B is wired pins 2+ hot, 2- cold. Similarly
channel C’s output Speakon socket carries Channel D’s output. Check the table on the rear
panel for details.
3: Input XLR sockets: Connect signal inputs to these sockets, wired pin 2 hot, 3 cold, 1
ground. For sensitivity and impedance of these inputs, please see the specifications on page
63. Inputs C & D may also be switched to AES digital inputs, each carrying a stereo AES
stream — channels A&B on socket C, channels C & D on socket D. This arrangement allows
an analogue stereo source to remain connected to sockets A & B for fallback purposes. To
select AES inputs please see the section on page 37.
4: Auxiliary output XLR sockets: These carry the four additional channels of separate DSP
processing — they are NOT just link outputs or a copy of the power amplifier channel’s
processed audio — they are fully independent.
5: Audio network connections1: Four additional inputs can be added to the available input
matrix via the optional Dante network card. This will also add four network audio outputs,
which can be chosen (in banks of four) from a variety of processing points within the
amplifier’s DSP structure. For more on this feature see the block diagram on page 21 and
set-up information from page 41.
6: Ethernet control port: Your amplifier may be remotely controlled by connecting it to a
computer via this standard Ethernet port connection. Please see the section starting on page
50 for how to use this feature. HINT: You can quickly check the amplifier’s IP address by
pressing ENTER + NEXT.
7: GPIO Port: Your amplifier has a pair of general purpose logic level input and outputs that
can be configured to recall memories, put the amplifier in standby, mute and control levels,
and also provide feedback about status.
8: RS485 Port: Your amplifier may also be controlled via an RS485 connection, and this port
may also be used to relay control data from the Ethernet port or the front panel USB port to
connect to further devices. Please see the remote control section on page 50 for more
information.
1The audio network card is an option and may not be fitted to your amplifier.
All vents on front and rear of unit must not be obstructed.
Tous l es p assages sur avant et ar rière d e l'un i té ne d oivent p as être ob stru és.
SERIAL NO.
OUTPUT
Cl ass 3 W i rin g
on Out p u t s
1 - AUDI O N ETW ORK - 2CONTROLGPIO PORT
1234 56
AUX 4 AUX 3 AUX 2 AUX 1
1: 0V
2/3: IN 1& 2
4/5: OUT 1& 2
6: +5V
RS485
A
E
S
A
&
B
A
E
S
C
&
D
OUTPUTOUTPUTOUTPUT OUTPUT WIRING
CONNECTORS
BR IDGE
1+
1-
2+
2-
PIN N UMBER
DESIGNE D AN D
MANUFAC TURED
IN ENGLAND
by
XTA Electronics Ltd.
and
MC Aud i o
2
MAINS SUPPLY
12
34
5
67
8

Page20 DPASeries—DPA80/DPA100 Operating Instructions
t
a
x
Operating Your Amplifier: Initial Set-up and Switching On
Please read all documentation before operating your amplifier and retain all documentation
for future reference.
Do not spill water or other liquids into or on the unit and do not operate your amplifier while
standing in liquid.
Do not block fan intake or rear ventilation outlets or operate the unit in an environment that
could impede the free flow of air around the unit.
If your amplifier is used in an extremely dusty or smoky environment, it should be cleaned of
any collected debris at regular intervals. Please also see the notes regarding maintenance on
page 62.
It is important that the power output of your amplifier is matched to the power handling
capacity of your loudspeaker. If not, damage to the loudspeaker could occur.
Switching On…
The first time you switch it on, your amplifier will start-up as a four analogue inputs to four
output system, with no EQ or limiting (apart from self-protective limiters) in place. The aux
outputs will “mirror” the analogue inputs (and so initially act just like “link” outputs, again
with no EQ or limiting in place).
The following section explains the DSP and audio features of the amplifier — please read this
carefully as the routing options are very comprehensive!