![Alto DPA4000 [5/20] The lto dpa2500 4000 40 bit dsp stereo amplifier is a high power low profile professional power amplifier](/img/pdf.png)
Alto DPA4000 [5/20] The lto dpa2500 4000 40 bit dsp stereo amplifier is a high power low profile professional power amplifier
![Alto DPA2500 [5/20] The lto dpa2500 4000 40 bit dsp stereo amplifier is a high power low profile professional power amplifier](/views2/1001253/page5/bg5.png)
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
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
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.
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.
1. INTRODUCTION
4
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.
This LED lights up when the unit is powered.
5. Power LED
Easy to operate front panel controls
DPA 4000
CH1
CLIP
LIMIT
OPERATING/
PROTECTION
POWER ON
40 BIT DSP ENHANCED
Stereo Power Amplifier
UP
DOWN
ENTER
SELECT
POWER
ON
OFF
1
23 4
5
987
6
CH2
LTO
R
PRESET
EDIT
VOLUME
CHSEL
HUM CANCEL
COMM
NOISE GATE
MULTICOMP
SIG/LIMITER
88
Содержание
- Dpa 2500 4000 1
- User s manual 1
- A registered electrician 2
- Always use proper ready made insulated mains 2
- And when unused for long periods of time to reduce 2
- Before turning the product on make sure that it is 2
- Caution 2
- Connected to ground this is to prevent the risk of 2
- Cord is removed 2
- Could result in fire 2
- Covers should be removed by qualified service 2
- Describes precautions that should be observed to 2
- Do not block areas of ventilation failure to do so 2
- Do not remove any covers 2
- Do not use this product when in close proximity to 2
- Electric shock 2
- Ensure that the mains source voltage ac outlet 2
- External connection 2
- Ground terminal 2
- Important safety instructions 2
- In shock death or fire if in doubt seek advice from 2
- Instructions 2
- Keep product away from naked flames 2
- Manual do not short circuit the fuse holder before 2
- May present to reduce the risk of electric shock do 2
- Never cut internal or external ground wires likewise 2
- Never remove ground wiring from the protective 2
- No user serviceable parts inside 2
- Not remove any covers unless the ac mains power 2
- Off and disconnected from the ac outlet 2
- Personnel only 2
- Possibly the user 2
- Power supply 2
- Prevent damage to the product 2
- Prevent the possibility of death or injury to the user 2
- Protect the power cord and plug from any physical 2
- Replacing the fuse make sure that the product is 2
- Safety related symbols 2
- The risk of electric shock or fire 2
- To avoid the risk of electric shock and damage do 2
- To do so could result in damage to the product and 2
- To prevent fire and damage to the product use only 2
- Warning 2
- Audio performance 3
- Dear customer 3
- Design centres in italy the netherlands and the united kingdom we provide you with world class designs while our 3
- Endeavors 3
- Featuring high power and superb quality together with superior reliability and stability to provide the highest possible 3
- Future products for you we guarantee you our commitment to quality continual research and development and of course 3
- Lto audio team 3
- Made the dpa2500 4000 stereo power amplifier a very reliable and high quality product ready for all your 3
- Major brands 3
- Preface 3
- Share with you our passion for what we design and we invite you to make suggestions which will aid us in developing 3
- Software development teams continue to develop an impressive range of audio specific algorithms 3
- Thanks for choosing lto dpa2500 4000 stereo power amplifier which is the result of our lto audio team s 3
- Venues and thanks to their passion for music and professional audio it has been possible for us to offer you 3
- We have been designing professional audio products for a long time in cooperation with many of the world s 3
- 3 application 4
- Control elements 4
- Features 4
- Table of contents 4
- Binding post and neutrik speakon connectors for outputs front panel led indicators for operating protection limiter power and clip manufactured under qs9000 vda6 certified management system 5
- 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 5
- Control elements 5
- Easy to operate front panel controls 5
- Feature list 5
- Front panel 5
- Introduction 5
- Must be lowered through better ventilation and decrease the signal level etc after the temperature has dro 5
- 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 5
- Of the presets included in the internal memory or pc editor software 5
- Than its price 5
- Thanks to the use of selected and expensive components the performance of dpa2500 4000 is worth much more 5
- The amplifier delivers tremendous power in only two rack spaces providing high performance under the most 5
- The lto dpa2500 4000 40 bit dsp stereo amplifier is a high power low profile professional power amplifier 5
- 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 5
- With in fact the amplifier functions far beyond a traditional power amplifier advanced features and great reliability 5
- 17 16 12 13 15 15 6
- According to practical need for your safety please be careful when do connecting work 6
- And another end with mains 6
- Balanced input connectors 6
- Balanced input parallel output 6
- Breaker 6
- Bridge mode 6
- Channel 1 or 2 will be output from both channel 1 and 2 simultaneously details refer to the chapter 9 6
- Doesn t work 6
- Enter key this key is used to edit or confirm the parameter s value 6
- In this mode channel 1 and channel 2 operate independently just as traditional stereo amplifier the signal 6
- In this mode the signal input into channel 1 will be output from the bridged end on the other hand the 6
- Input input 6
- Input into channel 1 can be output from channel 1 only similarly the signal input into channel 2 can be output 6
- It is used to connect power cord after setting the proper voltage connect one end of power cord with the unit 6
- Level control for channels 1 2 these two controls are used to adjust output level of channel 1 and channel 2 respectively 6
- Limiter switch 6
- Mode selector total two optional modes up for stereo mode down for bridge mode 6
- Output connector 6
- Output level control of channel 2 should be turned down to smallest details refer to the chapter 9 6
- Output1 6
- Output2 6
- Parallel output connectors 6
- Paralleled mode please also refer to wiring diagram for paralleled mode 6
- Power outputs 6
- Power source socket 6
- Rear panel 6
- Select key this key is used to select the menu that you wish to edit 6
- Serial port 6
- Stereo mode 6
- These connectors have two kinds binding post and speak on connector you can choose proper connectors 6
- These two output connectors are paralleled inside with the two input connectors it enables the unit to work under 6
- This switch functions as fuse for protecting the unit from damage when the unit is overloaded or the 6
- Thus keeping consistent output level for protecting apparatus if the switch is set at off the limiter function 6
- Up down key this key is used to move inside the menus or to modify the parameter s value 6
- 4000 stereo amplifier and pc or another dpa2500 4000 stereo amplifier the rs485 port is very suitable for 7
- 4000 stereo amplifiers 7
- And pc via connecting the dpa2500 4000 stereo amplifier to a pc all the processor functions are possible to 7
- Appear on the display 7
- Be controlled remotely by alto editing software 7
- Edit menu 7
- Getting started 7
- Note this adjustment of volume level effects only on the selected channels 7
- Preset selection 7
- Press enter key till an additional appeared after the present volume value 7
- Rs232 serial communication port 7
- Rs485 in 7
- Rs485 out 7
- Select edit menu using select key both the edit and volume indicators will light up and the last selected volume level will be displayed 7
- Select preset using select key the preset indicator lights up and the last selected preset will 7
- The fan speed which controls the inside air flowing speed 7
- The function of the rs485 in is opposite to rs85 out it allows incoming communication between a dpa2500 7
- The number of last preset will appear on the display 7
- This is the standard serial communication interface it allows outgoing communication between a dpa2500 7
- This menu includes 4 items volume hum cancel noise gate multicomp 7
- Use up down keys to adjust the level of output signal 7
- Use up down keys to select a desired preset press enter key to load the preset 7
- Volume adjustment 99 0db 7
- Channel selection 8
- Comm selection 8
- Displayed 8
- How to set the dpa s id number 8
- Hum cancel on off 8
- Noise gate on off select edit using select key 8
- Note the hum cancel indicator will be lighting all the time if you set this function on and it effects only on 8
- Note the noise gate indicator will be lighting all the time if you set this function on and it effects only on 8
- Press enter key to set noise gate on or off 8
- Press enter to set hum cancel function on or off 8
- Press enter to turn the multiband compressor on or off 8
- Remote control 8
- Select edit using select key 8
- Selected channels the 8
- Sig limiter led 8
- The selected channels multicomp on off select edit using select key 8
- Then select multicomp using up down keys both the edit and multicomp indicators will light 8
- Then select noise gate using up down keys both the edit and noise gate indicators will light up 8
- When several dpa are connected to a pc for the remote control each of units must have an id number 8
- Balanced input parallel output 9
- Breaker 9
- By selecting the maxi eoitor icon in the windows programs menu 9
- Connect rs485 in of the second dpa to the first dpa s rs485 out socket in this way you can connect up 9
- Connect the first dpa to the pc s rs232 serial port using a 9 pin female plug connected to the rs232 socke 9
- Connection diagram of remote control 9
- Connection to the pc 9
- Dpa units for a same pc 9
- Dpa2500 4000 9
- First steps with the pc editor 9
- From rs485 out 9
- If the first unit is placed at a distance to the pc that exceeds 5 meters rs232 to rs485 converters m 9
- Important 9
- Input input 9
- On the rear panel of unit 9
- Otherwise none of the other units can be controlled by the pc 9
- Output1 9
- Output2 9
- Power outputs 9
- Serial port 9
- Tiating a session between the dpa unit and your computer 9
- To from rs232 rear panel 9
- To from rs232 serial port 9
- To rs485 in 9
- With the powered up and connected to your pc s serial port as described run the pc editor 9
- Actions menu of the pc editor however if you intend to use the channel delay function for speaker time 10
- Are simultaneously applied to both channels this is achieved via the modify unit option in the 10
- Choose online from the actions menu and the pc will scan the serial port to verify that th 10
- Connected or not pressing ok will prompt the system to retrieve upload all the parameters and all previously 10
- Correspo 10
- Dpa unit 10
- Edit mode password protection 10
- Every time a download is made to the the user presets in the internal memory and any unsaved set 10
- Every time an upload is made all the user presets stored in the are transferred to the 10
- If you do not wish this to happen i e if you do not wish to overwrite the current data in the then you 10
- If your has already been installed and set up and you now wish to view and or modify some 10
- If your has not been set up yet or if you want to replace the existing set up 10
- Lock buttons a text box will open allowing you to enter a password of your own total choice click ok impor 10
- Nding numbered presets within the pc editor 10
- Rmation follows 10
- Screen you can now view the settings and edit them depending on the lock mode 10
- The inputs and each pair of outputs be ganged linked together as stereo pairs so that changes ganging 10
- The same software is used for some of our pro audio models select dpa amp and click ok 10
- Up you were working on are overwritten selecting offline from the actions menu will cause the pc to be 10
- You can create 10
- Are replaced 12
- Crossover allows the modification of the hpf and lpf crossover filters including frequency type 12
- Eq allows the modification of the eq filters parameters the graph below shows the response curves of the input 12
- Hum cancel allows the modification of the dynamic notch filter parameters the graph included shows the 12
- Mxe on your computer go to and then a window will open for you to select a destination folder file save as 12
- Parameter menus description 12
- Remember that every time you download from your pc to the dpa unit the user presets in the internal memory 12
- When you have done this take the offline click on the icon and then online again this will force the pc editor to do 12
- Working with presets 12
- You must now save your settings which may include several different preset set ups as a maxi editor file 12
- Balanced jack 13
- Balanced xlr f 13
- Balanced xlr m 13
- Connections 13
- Inputs a b 13
- Inputs a b rs485 in 13
- Parsllel output connectors rs485 out 13
- Rs232 9 pin 13
- The following diagrams show the schemes of the recommended cables and some connection examples referred to 13
- Various system configurations 13
- Application 14
- Balanced 14
- Balanced input parallel output 14
- Breaker 14
- Channel 1 14
- Channel 1 channel 2 14
- Channel 2 14
- In this mode channel 1 and channel 2 operate independently just as traditional input into channel 1 can be out 14
- Input connector input connector 14
- Input input 14
- Output1 14
- Output2 14
- Power outputs 14
- Put from channel 1 only similarly the signal input into channel 2 can be output from channel 2 only 14
- Serial port 14
- Stereo mode 14
- Balanced input parallel output 15
- Breaker 15
- From both channel 1 and channel 2 simultaneously the volume of channel 1 or channel 2 can be contr tuput olled 15
- Input connector input connector 15
- Input input 15
- Output1 15
- Output2 15
- Power outputs 15
- Separately 15
- Serial port 15
- You can also operate the paralleled mode via outside wiring so the signal input from channel 1 or 2 will beo 15
- Balanced input parallel output 16
- Breaker 16
- Input connector input connector 16
- Input input 16
- Mode release this button 16
- Output1 16
- Output2 16
- Serial port 16
- Balanced 17
- Balanced input parallel output 17
- Breaker 17
- Bridge mode 17
- Control of channel 1 is used to control the volume of whole system 17
- In this mode the signal input into channel 1 will be output from the bridged end on the other hand the output level 17
- Input connector input connector 17
- Input input 17
- Output1 17
- Output2 17
- Power outputs 17
- Serial port 17
- Technical specifications 18
- All the information presented in this warranty registration card gives the manufacturer a better understanding 19
- The warranty service is only available to the original consumer who purchased this product directly from 19
- Warrants that this product will be free from any defects in materials and or workmanship for a pe 19
- Warranty 19
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