Nilfisk DPA 2500, DPA 4000 User Manual

User's Manual
40 BIT ENHANCED
DPA 2500/4000
STEREO POWER AMPLIFIER
LTO
www.altoproaudio.com
Version 1.0 September 2004
R
SAFETY RELATED SYMBOLS
CAUTION
RISK OFELECTRIC SHOCK
DO NOTOPEN
This symbol, wherever used, alerts you to the pre­sence of un-insulated and dangerous voltages with­in the product enclosure. These are voltages that may be sufficient to constitute the risk of electric shock or death.
This symbol, wherever used, alerts you to impo­rtant operating and maintenance instructions. Please read.
Protective Ground Terminal
AC mains (Alternating Current)
Hazardous Live Terminal
ON: Denotes the product is turned on.
OFF: Denotes the product is turned off.
WARNING
Describes precautions that should be observed to prevent the possibility of death or injury to the user.
the recommended fuse type as indicated in this manual. Do not short-circuit the fuse holder. Before replacing the fuse, make sure that the product is OFF and disconnected from the AC outlet.
Protective Ground
Before turning the product ON, make sure that it is connected to Ground. This is to prevent the risk of electric shock.
Never cut internal or external Ground wires. Likewise, never remove Ground wiring from the Protective Ground Terminal.
Operating Conditions
Always install in accordance with the manufacturer's instructions.
To avoid the risk of electric shock and damage, do not subject this product to any liquid/rain or moisture. Do not use this product when in close proximity to water.
Do not install this product near any direct heat source.
Do not block areas of ventilation. Failure to do so could result in fire.
Keep product away from naked flames.
CAUTION
Describes precautions that should be observed to prevent damage to the product.
WARNING
Power Supply
Ensure that the mains source voltage (AC outlet) matches the voltage rating of the product. Failure to do so could result in damage to the product and possibly the user.
Unplug the product before electrical storms occur and when unused for long periods of time to reduce the risk of electric shock or fire.
External Connection
Always use proper ready-made insulated mains cabling (power cord). Failure to do so could result in shock/death or fire. If in doubt, seek advice from a registered electrician.
Do Not Remove Any Covers
Within the product are areas where high voltages may present. To reduce the risk of electric shock do not remove any covers unless the AC mains power cord is removed.
Covers should be removed by qualified service personnel only.
No user serviceable parts inside.
Fuse
To prevent fire and damage to the product, use only
IMPORTANT SAFETY INSTRUCTIONS
Read these instructions
Follow all instructions
Keep these instructions. Do not discard.
Heed all warnings.
Only use attachments/accessories specified by the manufacturer.
Power Cord and Plug
Do not tamper with the power cord or plug. These are designed for your safety.
Do not remove Ground connections!
If the plug does not fit your AC outlet seek advice from a qualified electrician.
Protect the power cord and plug from any physical stress to avoid risk of electric shock.
Do not place heavy objects on the power cord. This could cause electric shock or fire.
Cleaning
When required, either blow off dust from the product or use a dry cloth.
Do not use any solvents such as Benzol or Alcohol. For safety, keep product clean and free from dust.
Servicing
Refer all servicing to qualified service personnel only.
Do not perform any servicing other than those instruc­tions contained within the User's Manual.
1
PREFACE
Dear Customer:
Thanks for choosing LTO DPA2500/4000 Stereo Power Amplifier which is the result of our LTO AUDIO TEAM's endeavors.
For LTO AUDIO TEAM,
We have been designing professional audio products for a long time in cooperation with many of the world's
major brands.
The LTO line represents unparalleled analogue and digital products made by musicians, for musicians. With our design centres in Italy, the Netherlands, and the United Kingdom we provide you with world-class designs, while our software development teams continue to develop an impressive range of audio specific algorithms.
By purchasing our LTO products you become the most important member of our LTO AUDIO TEAM. We would like to share with you our passion for what we design and we invite you to make suggestions, which will aid us in developing future products for you. We guarantee you our commitment to quality, continual research and development, and of course the best performance/price ratio.
Our LTO DPA2500/4000 Stereo Power Amplifier is the result of many hours of listening and tests involving common people, area experts, musicians and technicians. The result of this effort is the sophisticated circuit design featuring high power and superb quality together with superior reliability and stability to provide the highest possible audio performance.
music and audio are much more than a job, they are a passion and an obsession!
We would like to thank all the people that worked with us to make a vision real! Our designers and LTO staff made the DPA2500/4000 Stereo Power Amplifier, a very reliable and high quality product ready for all your
venues. And thanks to their passion for music and professional audio it has been possible for us to offer you, our most important team member, our continued support too.
Thank you very much.
LTO AUDIO TEAM
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TABLE OF CONTENTS
1. INTRODUCTION.....................................................................................................................................4
2. FEATURES.............................................................................................................................................4
3. CONTROL ELEMENTS..........................................................................................................................4
3.1 The Front Panel
3.2 The Rear Panel
4. GETTING STARTED................................................................................................................................6
4.1 Preset Selection
4.2 Edit Menu
4.3 Channel Selection
4.4 Comm Selection:
4.5 SIG/LIMITER LED
5. REMOTE CONTROL ...............................................................................................................................7
5.1 How to set the DPA's ID number
5.2 Connection to the PC
5.3 First Steps with the PC Editor
5.4 Edit Mode (Password Protection)
5.5 Help File
5.6 Introduction to the PC Editor
6. .................................................................................................11PARAMETER MENUS DESCRIPTION
7. ..................................................................................................................11WORKING WETH PRESETS
8. .......................................................................................................................................... 12CONNECTIONS .
9. .......................................................................................................................................13APPLICATION
9.1 Stereo Mode
9.2 Bridge Mode
10. .......................................................................................................... 17TECHNICAL SPECIFICATIONS .
11. WARRANTY..........................................................................................................................................18
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1. INTRODUCTION
The LTO DPA2500/4000 40 Bit DSP Stereo Amplifier is a high power, low profile, professional Power Amplifier
with In fact, the amplifier functions far beyond a traditional power amplifier,advanced features and great reliability.
it is also a versatile effect processor. You can set the input and output audio configuration through recalling one
of the presets included in the internal memory or PC editor software.
The amplifier delivers tremendous power in only two rack spaces, providing high performance under the most
demanding conditions. It contains two independent channels, with separate AC transformer secondaries, power
supplies and protection system. All protection systems, except the main AC one, are self resetting upon removal
of fault, and the remaining channels shall continue to operate. Each channel has independent protective circuitry against open circuit, short circuit, mismatched loads and over temperature.
Thanks to the use of selected and expensive components, the performance of DPA2500/4000 is worth much more
than its price.
2. FEATURE LIST
Built in 40-bit digital effect processor. Remote control through PC link 1 factory preset and 32 user presets by large memory capacity Delay lines up to 582ms for each output Easy to operate front panel controls User-controllable clip limiter. Stereo (dual channel), or bridge mono (bi-amp output) operation mode. Balanced XLR inputs/parallel outputs to ensure noiseless long wiring. Binding post and Neutrik Speakon connectors for outputs. Front panel LED indicators for operating/protection, limiter, power and clip. Manufactured under QS9000, VDA6.1 certified management system.
3. CONTROL ELEMENTS
3.1 Front Panel
1. Power Switch
Turn the unit power ON or OFF.
2. Clip LED
When the signal distortion reaches or surpasses 0.5%, the LED lights up. This means the output level of
signal source is too high and it is time to reduce input level until clip LED turns off.
3. Output Limiter LED
While the unit is limiting the output signal, the LED lights up.
DPA4000
CH1
40 BITDSP ENHANCED
CLIP
LIMIT
OPERATING/ PROTECTION
POWERON
4. Operating and Protection LED
In normal operation, the LED is green, if the LED is red, it means the unit is in heat protection, no signal output at
the time and over-heat inside the unit (the surface temperature of power transistor is over 100 ), the temperature
must be lowered through better ventilation and decrease the signal level etc. After the temperature has dro-
pped, the protection stops and meanwhile the LED turns off with the unit recover normal work.
5. Power LED
This LED lights up when the unit is powered.
4
6. Level Control for Channels 1&2
These two controls are used to adjust output level of channel 1 and channel 2 respectively.
7. UP/DOWN Key
This key is used to move inside the menus or to modify the parameter's value.
8. SELECT Key
This key is used to select the menu that you wish to edit.
9. ENTER Key
This key is used to edit or confirm the parameter's value.
3.2 Rear Panel
INPUT INPUT
2
PARALLEL
OUTPUT
INPUT
TIP/PIN2 RING/PIN3
CH2
SLEEVE/PIN1
2
1
1
MODE
STEREO
BALANCED
BRIDGE
INPUT
CH1
2
3
BALANCED
INPUT
1
1716 121315 15
TIP/PIN2 RING/PIN3 SLEEVE/PIN1
LIMITER
1114
POWER OUTPUTS
CH1
1+ 1-
POS NEG
CH2
2+ 2-
POS NEG
INPUT
BRIDGE
1+ 2+
POS NEG
OUTPUT1
2
3
OFF
PARALLEL
ON
OUTPUT
CH2
1+ 1-
1
POS NEG
OUTPUT2
BRIDGE
Apparatenskall anslutas tilljordat uttag nar den anslutstill ett natverk
CH1
BREAKER
MONO
CH2
10
1918
RS485IN
RS485OUT
RS232
SERIAL PORT
20
10. Power Source Socket
It is used to connect power cord after setting the proper voltage, connect one end of power cord with the unit
and another end with mains.
11. Breaker
This switch functions as fuse for protecting the unit from damage. When the unit is overloaded or the temperature inside the unit is too high, this pushing button will spring up and break the power supply. The
power supply will be recovered after pushing this switch down again.
12. Output Connector
These connectors have two kinds: Binding post and Speak-on connector. You can choose proper connectors
according to practical need. For your safety, please be careful when do connecting work.
13. Limiter Switch
Set this switch at "ON" position, once the output level is above maximum output level, the limiter begins,
thus keeping consistent output level for protecting apparatus. If the switch is set at "OFF", the limiter function
doesn't work.
14. Balanced Input Connectors
These connectors connect the input signal of channel 1 and channel 2 separately.
15. Parallel Output Connectors
These two output connectors are paralleled inside with the two input connectors. It enables the unit to work under
paralleled mode. Please also refer to wiring diagram for paralleled mode.
16. Mode Selector
Total two optional modes: Up for Stereo mode; Down for Bridge mode.
- Stereo Mode
In this mode, channel 1 and channel 2 operate independently (just as traditional stereo amplifier). The signal
input into channel 1 can be output from channel 1 only, similarly, the signal input into channel 2 can be output
from channel 2 only.You can also operate the paralleled mode via outside wiring, so, the signal input from
channel 1 or 2 will be output from both channel 1 and 2 simultaneously. Details refer to the chapter 9.
- Bridge Mode
In this mode, the signal input into channel 1 will be output from the bridged end, on the other hand, the
output level control of channel 2 should be turned down to smallest.Details refer to the chapter 9.
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