Lyngdorf Audio Stereo Amplifier DPA 1 User Manual

Owner´s manual  
DPA-1  
RoomPerfect™  
DIGITAL  
MUTE  
ANALOG  
MENU  
ENTER  
DPA-1 Digital Pre-Amplifier  
 
Table of Contents  
Operating Voltage  
4
4
Input Name  
26  
26  
Unpacking the DPA-1  
Serial Number Registration  
Introduction  
Input Sensitivity  
4
Advanced Setup  
- Communication  
- Comm Address  
- Comm Speed  
- Master/Slave  
- Digital Out  
27  
27  
27  
27  
27  
27  
28  
28  
28  
28  
28  
28  
29  
29  
30  
30  
31  
31  
31  
31  
5
Accessories  
6
Front Panel  
7
- Main Out  
- Main Out Control  
- Main Out Level  
- Line Out  
- Line Out Control  
- Line Out Level  
- Routing  
- Crossover Frequency  
- Filter Type  
- Delay  
- Trigger Setup  
- Remote Control  
- Firmware Versions  
- Factory Reset  
Display Indicators  
Rear Panel  
8
8
Remote Control  
10  
Connecting the DPA-1  
- Connecting to sources and amplifiers  
- Using Main and Line outputs  
12  
12  
13  
Menu System  
- Navigating the Menu System  
14  
14  
Menu Tree  
15  
RoomPerfect™ Troubleshooting  
Firmware Upgrading  
32  
33  
Introduction to RoomPerfect™  
- Global Listening  
- Focus Listening  
- Voicing  
16  
16  
16  
16  
Connectors  
34  
34  
34  
34  
34  
34  
- Mains Connector  
- Trigger Connector  
- Optional AD Converter Board  
- Balanced Inputs  
RoomPerfect™  
- Guided Setup  
17  
17  
18  
19  
19  
20  
21  
22  
22  
22  
23  
23  
- Setting the Measurement Volume Level  
- Focus Measurement  
- Room Measurements  
- Adding more Room Measurements  
- Calculation of Focus 1 and Global Filters  
- Advanced Options  
- Measure Focus Pos.  
- Measure Room Pos.  
- RoomKnowledge  
- RoomCorrection  
- Unbalanced Inputs  
Cleaning and Maintenance  
34  
Technical Specifications  
- Audio  
- Protection  
- Mains  
- Trigger  
- Mechanical  
35  
35  
36  
36  
36  
36  
Display  
24  
24  
24  
24  
Technical Assistance  
37  
- Display Timeout  
- Disp. Brightness  
- Volume Disp. Timeo.  
Appendix  
- Voicing Curves  
38  
38  
Volume  
- Def. Vol.  
- Max. Vol.  
25  
25  
25  
Manual version 14-05-07  
 
3
Operating Voltage  
The DPA-1 can be switched between 115V and 230V mains voltage.  
In 115V mode the DPA-1 requires a mains voltage of 100V-120V at 50-60Hz.  
In 230V mode the DPA-1 requires a mains voltage of 220V-240V at 50-60Hz.  
The mains voltage setting for your DPA-1 can be changed on the rear selector.  
Make sure the rear selector is in the correct setting and connect the power input  
only to the appropiate AC source. The warranty will not cover any damage caused  
by connecting to the wrong type of AC mains.  
The DPA-1 has three power modes:  
1. OFF  
No circuitry is powered. Please note that some parts of the mains entry section still carry live mains.  
2. STANDBY  
The microprocessor is active.  
3. ON  
All circuits are active.  
Unpacking the DPA-1  
Carefully remove the unit and accessory kit from the carton, visually check for shipping damage.  
Contact both the shipper and your Lyngdorf Audio representative immediately if the unit bears any sign  
of damage from mishandeling. All Lyngdorf Audio equipment is carefully inspected before leaving our  
factory.  
Keep shipping carton and packing material for future use or in the unlikely event that  
the unit needs servicing. If this unit is shipped without the original packing, damage  
could occur and void the warranty.  
Serial Number Registration  
Please record the serial number of your DPA-1 here for future reference. The serial number is printed  
on the label on the rear panel. You will need this serial number, should you ever require service for your  
DPA-1.  
DPA-1 serial number: _____________________  
 
4
Introduction  
Congratulations on the purchase of your Lyngdorf Audio DPA-1 with RoomPerfect™.  
Besides being a state-of-the-art pre-amplifier, it also enables you to take advantage of the most advanced  
room correction system on the market. It is implemented in such a way that you will always achieve the  
perfect result. No computer needed, no acoustic knowledge needed, no user input needed. We leave  
nothing to chance in the fully automated calibration process.  
However, for the advanced user there are plenty of challenges since the DPA is also a complete ‘Control  
Centre’ that allows you to build advanced multi-way passive or active speaker systems. This is possible  
due to the very powerful built-in DSP ‘engine’ which facilitates signal routing, creation of active cross-  
overs, delay settings etc.  
In fact we believe it to be the most versatile pre-amplifier on the market today, a true state-of-the-art  
device that sets new standards for what’s sonically possible to achieve in a real life environment.  
 
5
Accessories  
You should find the following accessories included:  
Mains cord  
8 m (26.25 feet)  
XLR – XLR cable  
Microphone  
Programming cable  
1
4
2
5
8
0
3
6
7
9
digital  
analog  
info  
menu  
RCS  
CD  
AMP  
TUNER  
channel  
volume  
ENTER  
A/B  
random  
repeat  
Remote control  
Microphone stand with Mic clamp  
(delivered in a separate carton)  
 
6
Front Panel  
DIGITAL  
MUTE  
ANALOG  
MENU  
ENTER  
DPA-1 Digital Pre-Amplifier  
1
2
3
4
5
6
7
8
Controls  
The buttons/controls on the front panel of the DPA-1 can all be operated either with direct presses or by  
operating the corresponding keys on the supplied remote control. All the keys on the front panel (except  
the Mains Switch) are duplicated onto the remote control as well.  
1. Mains Switch  
Powers the DPA-1 on/off.  
2. Mute  
Toggles Mute mode on/off.  
Pressing the Mute button for 3 seconds will set the DPA-1 in stand-by mode.  
3. Analog Input Selector  
Changes to Analog input, or if already selected, cycles to the next Analog input.  
In standby mode, press to turn On the DPA-1 with the last selected analog input.  
4. Digital Input Selector  
Changes to Digital input, or if already selected, cycles to the next Digital input.  
In standby mode, press to turn On the DPA-1 with the last selected digital input.  
5. Display  
Display with all information on the menu system, status, active input selection and volume control.  
6. Volume Wheel  
Optical encoded volume control wheel.  
7. Navigation Keys  
In stand by mode, press Enter to turn On the DPA-1 with the last selected input.  
In normal operation mode the Up/Down toggles between bypass and the available Focus and Global  
filters. The Left/Right keys toggles between neutral and the available voicings.  
In menu mode the keys are used for navigation in the menu system: Up/Down, Left/Right & Enter. Press-  
ing and holding down the Up/Down, Right/Left keys, changes selected values fast.  
8. Menu Button  
Toggles Menu mode on/off  
 
7
Display Indicators  
D
A
1
2
3
4
5
1
2
3
4
5
1. A-D  
Illuminates to indicate whether the active input is Analog or Digital.  
2. Menu  
Alphanumeric Display (2*20 Characters).  
3. 1-5  
Illuminates the active input.  
4. RoomPerfect Logo  
Is illuminated when a filter is active.  
5. Volume Display  
3 digits indicating Volume control setting from 00.0 to 99.9 – in dB’s.  
Mute is indicated by the Volume control setting ‘---’.  
Standby mode is indicated with the decimal dot from the volume indicator being lit only.  
Rear Panel  
1
2
3
4
5
100-120V~/ 220-240V~  
~50-60Hz 35W  
6
7
8
9
10  
11  
12  
13  
1. Analog Input 1-3  
Unbalanced/RCA Left/Right Analog input pairs  
2. Analog Input 4  
Balanced/XLR Left/Right Analog input  
3. Analog Output  
Double pair of balanced/XLR Left/Right analog outputs (Main and Line out).  
4. Analog Output  
Double pairs of unbalanced/RCA Left/Right analog outputs (Main and Line out).  
 
8
5. 115V and 230V Mains Voltage Switch.  
Switches between 115V and 230V mains input voltage.  
Make sure the rear selector is in the correct setting and connect the power input  
only to the appropiate AC source. The warranty will not cover any damage caused  
by connecting to the wrong type of AC mains.  
6. Digital Input 1-3  
RCA connectors for SPDIF input  
7. Digital Output  
The digital output can be selected as the main or the line channel. In both cases the output can be se-  
lected as Full Scale or Regulated.  
The sample rate is fixed at 96 kHz. This output is also active when Analog input is selected.  
8. Digital Input 4  
XLR Connector for AES input  
9. Optical Digital Input 5  
Connector for Toslink input  
10. Mic. In  
Mic. in for connection of RoomPerfect™ microphone.  
11. Trigger Out  
DC Trigger out for remote start of SDA 2175, power amplifiers or other suitable equipment with a remote  
start.  
The output voltage is 12V and a maximum current of 50mA can be drawn from the output.  
12. RS232 Input/Aux  
RS232 communication connectors for communication with a PC, remote control from other Lyngdorf  
equipment with broadcast commands or linked control between several other amplifiers or other suitable  
equipment with a remote start.  
The ‘INPUT’ is used for connection to a PC, or as a control input from a Lyngdorf master amplifier.  
The ‘AUX’ connection is output in Master mode for controlling slave amplifiers, or bypasses input  
from other master amplifiers to the next amplifier.  
13. Mains Input  
 
9
Remote Control  
The remote control is used to access the menu system as well as the buttons directly accessible on the  
front panel. To control the DPA-1 the AMP key must be pressed (please note the DPA-1’s volume and  
mute buttons still work when in other modes).  
The functionality of the buttons when AMP is pressed are as follows:  
1. Standby  
1
The standby button puts the DPA-1 in stand-by mode.  
1
4
2
5
8
0
3
6
2
2. Numerical Buttons 1-8  
Selects Focus listening mode (up to 8 different listening positions can  
be stored in RoomPerfect™).  
7
9
3
6
9
digital  
analog  
info  
4
5
7
8
menu  
3. Numerical Button 9  
Selects global listening mode.  
12  
13  
RCS  
CD  
10  
11  
AMP  
TUNER  
14  
16  
17  
channel  
volume  
15  
4. Digital  
Turns On the DPA-1 from stand-by mode in the last selected digital  
input.  
ENTER  
Selects Digital input, or if already selected, cycles to the next Digital  
input. To select a specific Digital input, press the ‘Digital’ button fol-  
lowed by numerical button 1-5 within 2 seconds.  
18  
A/B  
random  
repeat  
5. Numerical Button 0  
Selects bypass listening mode (no room correction filter selected).  
6. Info  
Hold down for 2 seconds to show the current samplerate.  
To select a specific Voicing filter, press the ‘Info’ followed by numerical  
button 0-6 within 2 seconds.  
7. Analog  
Turns On the DPA-1 from stand-by mode with the last selected analog  
input.  
Selects Analog input, or if already selected, cycles to the next Analog  
input. To select a specific Analog input, press the ‘Analog’ button fol-  
lowed by numerical button 1-4 within 2 seconds.  
8. Mute  
Toggles Mute function on/off.  
9. Menu  
Activates or de-activates the Menu system on the Main display.  
10. AMP  
Selects the remote for operation with a Lyngdorf Amplifier/Pre-amp.  
11. RCS  
Selects the remote for operation with a Lyngdorf Room Processor.  
12. CD  
Selects the remote for operation with a Lyngdorf CD Player.  
 
10  
13. Tuner  
No function.  
14. Channel -/+  
Toggles down/up between inputs.  
15. Volume Up/down  
Increases or decreases the volume in the chosen direction.  
16. Up / Down / Left / Right  
In normal operation mode the Up/Down toggles between bypass and the available Focus and Global  
filters and the Left/Right toggles between neutral and the available voicings.  
In menu mode they are used for navigation in the menu system. Pressing and holding down a key  
changes selected values fast.  
17. Enter  
Turns the DPA-1 On from stand-by mode with the last selected input and works as Enter in menu sys-  
tem.  
18. No Function.  
 
11  
Connecting the DPA-1  
Connecting to sources and amplifiers  
The DPA-1 is very simple to hook up.  
1. Connect all sources to the DPA-1.  
Then connect the DPA-1 output signal to a poweramplifier.  
Source(s)  
DPA-1 Digital Pre-Amplifier  
DPA-1  
Poweramp  
 
12  
Using Main and Line outputs  
As described in “Routing” and “Crossover Frequency” there are many ways to utilize the Main and Line out-  
puts. Here we have described the three most common set-up´s. Please note the products, outputs and cross-  
over frequencies are chosen randomly in these descriptions. Combine them at your own will and needs.  
1. Single-amp set-up with no subwoofer.  
A poweramp is connected to each Main Output Left and Right. No crossover is selected.  
Main Output Left  
No filter  
DPA-1  
Main Output Right  
No filter  
Speaker  
Poweramp  
Speaker  
2. Poweramplifier and subwoofer set-up.  
A poweramp is connected to the Main Out Left and Right and highpass crossover is set at 80Hz.  
The Subwoofer is connected to the Line Output and lowpass crossover is set at 80Hz. Remember to set  
the subwoofer cut-off frequency to maximum.  
Main Output Left + Right  
Highpass filter set at 80Hz  
DPA-1  
Line Output Right  
Mono lowpass filter set at 80Hz  
Speakers  
Active subwoofer  
Poweramp  
3. Lyngdorf 2+2 setup.  
A poweramp is connected to Line Output Left and Right and highpass crossover is set at 400Hz.  
Two Lyngdorf boundary woofers are connected to Main Output Left and Right, through a poweramp, and  
lowpass crossover set at 400Hz.  
Main Output Left + Right  
Highpass filter set at 400Hz  
DPA-1  
Line Output Left + Right  
Lowpass filter set at 400Hz  
Speakers  
Poweramp  
Poweramp  
Boundary woofers  
 
13  
Menu System  
The Main Display on the front panel of the DPA-1 shows all functionality and current status of the DPA-1.  
An overview of the menu tree can be seen in the ‘Menu Tree’ chapter.  
Navigating the Menu System  
Pressing the Menu button on the front panel or the remote enters the menu or steps back one level in  
the menu system.  
Using the left/right arrows keys the Menu system settings can now be scrolled through. To access a sub  
menu setting scroll to it and press the Enter button. To change a setting, use the Up/Down and/or Left/  
Right arrows and press Enter to accept the change, or Menu to exit without applying any changes.  
 
14  
Menu Tree  
This is an overview of the entire DPA-1 menu structure.  
DPA -1 Main Menu  
RoomPerfect  
Advanced setup  
Advanced setup  
Guided setup  
Communication  
Trigger setup  
Advanced options  
Comm Address  
Remote Control  
Firmware versions  
Factory Reset  
Measure Focus Pos  
Comm Speed  
Measure Room Pos  
RoomKnowledge  
RoomCorrection  
Master /Slave  
Digital Out  
Main Out  
Main Out Control  
Main Out Level  
Line Out  
Display  
Display Timeout  
Disp . Brightness  
Volume Disp. Timeo.  
Volume  
Line Out Control  
Line Out Level  
Routing  
Def. Volume  
Max. Volume  
Crossover freq  
Filter Type  
Input Name  
Input Sensitivity  
Delay  
 
15  
Introduction to RoomPerfect™  
Once the guided set-up has been successfully completed you have the option to listen to music through  
two listening settings; Focus 1 and Global room correction filters. The RoomPerfect™ filters are stored  
on the numerical buttons from 1 to 9 on the remote control. To change from one filter to the other you  
simply press the numerical button corresponding to the desired filter, or toggle between them by press-  
ing the Up/Down buttons on the remote or front panel.  
Global is stored on numerical button 9 and the Focus 1 is stored on numerical button 1. Furthermore you  
can add 7 more Focus/listening position (8 in all). The additional focus/listening positions can be stored on  
numerical buttons from 2 to 8. To bypass the room correction filters, press numerical button 0.  
Global Listening  
The Global filter improves the sound quality across the whole room. When you are listening to music in  
a room but are not sat in any particular listening position, the global filter gives the best result.  
Focus Listening  
The Focus filter improves the sound quality at a listening position by exploiting the 3-dimensional acous-  
tic properties gained through the room measurements. This makes the Focus filter the best solution for  
optimal sound quality at a specific listening position.  
Voicing  
When using RoomPerfect™ you will experience a much more precise and detailed sound reproduction  
– which could also be described as more analytical.  
The Voicing setting is an EQ filter that can be used to gently amplify or attenuate certain frequencies ac-  
cording to your personal preferences and/or to compensate if a given recording sounds too ‘bright’ or too  
‘dark’. The standard voicing settings, and their numerical value on the remote control, are:  
Neutral (0), Music 1 (1), Music 2 (2), Relaxed (3), Open (4), Open Air (5), Soft (6).  
The frequency curves of the different voicing settings can be viewed in the appendix. Neutral is a bypass  
setting.  
You can toggle between neutral and the available voicings by pressing the Left/Right buttons on the re-  
mote or front panel. The voicings can also be chosen directly on the remote by pressing the ‘Info’ button  
followed by 0-6.  
 
16  
RoomPerfect™  
The sub menus accessible in the RoomPerfect™ menu are:  
RoomPerfect  
Guided setup  
Advanced options  
Advanced options is only available when Guided set-up has been performed.  
Guided Setup  
When you enter the RoomPerfect™ Main Menu for the first time, only the Guided setup is available.  
Press Enter to initiate the guided set-up.  
The main steps in the guided set-up procedure are:  
Setting the measurement volume level  
Taking one Focus (listening position) measurement  
Taking at least three room position measurements  
Adding more room measurements in the guided set-up (optional)  
Finally, automatic calculation of Focus and Global filters  
If you wish to leave the guided set-up at any time during the set-up, simply press the ‘Menu ’ button and  
the following message appears, ‘Exit without saving? No/Yes’.  
Choose Yes to exit the guided set-up without saving any data or,  
Choose No to cancel and continue with the guided set-up.  
 
17  
Setting the Measurement Volume Level  
The calibration volume is a recommended maximum volume. It is important that you always judge  
whether the calibration volume is too loud. The calibration volume should not be so loud that it causes:  
uncomfortably loud sounds that are inconvenient to you or your environment, or  
damage to your loudspeakers.  
When the message ‘Connect and place mic. in focus pos.’ appears, connect the microphone to the mi-  
crophone input found on the back panel. Thereafter, place the microphone, using the microphone stand,  
in an appropriate focus/listening position. This location should be at your main listening position, typically  
more or less centered between the loudspeakers.  
Make sure that the height and the orientation of the microphone corresponds to your typical listening  
height and direction as illustrated and do not block the line of sight between the microphone and the  
loudspeakers.  
When the microphone has been correctly connected and placed in the focus position, you are ready to  
set the calibration volume. The calibration signal is a combination of the high and low frequency measur-  
ing signals and is only presented in your left loudspeaker. The measuring signals sound very artificial and  
disharmonic due to the fact that they are composed of pure tones at different frequencies.  
Press Enter to confirm and to commence the calibration process.  
The test signal will start and shortly thereafter the DPA-1 will suggest an initial estimate of the desired  
maximum calibration volume (in dB), displayed as ‘Desired vol. max XXdB – Retry/Save Current’  
Please raise or lower the volume towards the desired maximum volume shown on the display but ensure  
you avoid clipping, uncomfortably loud levels and damage to the loudspeakers. Continue choosing Retry  
for a re-estimation of the desired maximum calibration volume, until an appropriate calibration volume  
is reached. If you find the suggested calibration volume too loud simply turn down the volume to an ap-  
propriate level and choose Save current.  
When the message ‘Calibration ok. Press Enter to continue’ is displayed, the calibration volume has suc-  
cessfully been set and saved.  
 
18  
Focus Measurement  
When the calibration is OK, press Enter to start the measuring process and ‘Measuring Focus position  
…’ will be displayed. Each measurement comprises four steps:  
A low and a high frequency measuring signal first in the left and then in the right channel.  
The length of each measurement depends on a combination of the measurement volume, set in the  
calibration process, and the background noise in your local environment. Typical measuring times for the  
low and high frequency measuring signals are 25 and 5 seconds, respectively.  
You can exit a commenced measurement by clapping close to the microphone.  
Do not sit in the listening position during focus measurements.  
The measurement will stop prematurely if an error occurs during the measuring process. In this case,  
an error message is displayed. Press Enter to continue and ‘Retry focus measurement – press Enter’ is  
displayed.  
If the error needs correcting this should be done at this point (see RoomPerfect™ troubleshooting),  
thereafter press Enter to retry the measurement. The measurement procedure will start again.  
A measurement has ended successfully when the last measuring signal stops and the display shows a  
RoomKnowledge rating, as ‘RoomKnowledge XX% - Measurement ok’. Press Enter to continue.  
Room Measurements  
The number of room positions needed depends on the value of RoomKnowledge, if it is below 90% after  
the third measurement the guide automatically includes extra room measurements until a RoomKnowl-  
edge of 90% or more has been achieved.  
The remaining measurements are to be placed in random positions in the room with random orienta-  
tions of the microphone. Choosing these random or arbitrary positions and orientations is easy. All you  
have to do is place the microphone at different positions in the room and with different orientations. It is  
important to perform well spaced measurements to get a covering image of the acoustical properties in  
the room, i.e. varying positions, heights and orientations of the microphone.  
For an optimal room correction it is very important that the measurements are:  
1. performed more than 1 meter (approx. 3 feet) away from the loudspeakers,  
2. not performed behind the loudspeaker, and  
3. that there is at least 50 cm/1.5 ft between each measurement.  
2.  
Not behind  
loudspeaker  
3.  
50  
cm  
1.  
1m  
 
19  
When a random measuring position and microphone orientation has been chosen press Enter. The measur-  
ing process will start and the display will show ‘Measuring room position 1’.  
The measurement will stop prematurely if an error occurs during the measuring process. In this case, the  
error message ‘Retry room measurement – press Enter’ is displayed. Press Enter to continue.  
If it is an error that needs correcting, then correct the error (see ‘RoomPerfect™ trouble-shooting’ chapter)  
and proceed with the room position measurement by pressing Enter. The measurement has ended success-  
fully when the last measuring signal stops and the display shows ‘RoomKnowledge XX% - Measurement  
ok’.  
This process is repeated at least three times and until the RoomKnowledge reaches 90%.  
Adding more Room Measurements  
If you have performed successful measurements and RoomKnowledge has reached 90%, the message  
‘Add more room meas.? Yes/No’ is displayed.  
At this point, or any time later, you can decide whether the acquired room measurements are sufficient or  
you wish to add further room measurements to learn more about the room’s acoustical information. Adding  
more room measurements results in a higher RoomKnowledge, this in turn improves the room correction  
filters.  
Choose Yes to add more room measurements. The room measuring process is now continued as  
described in the previous section.  
Choose No when no additional measurements are required. The volume will now return to default  
volume or lower, depending on the volume you have entered the guided set-up with.  
The message ‘Save guided measurement - Yes/No’ will be displayed when exiting a successfully completed  
guided set-up.  
Choose Yes to save the results of the guided set-up and calculate the focus and the global room  
correction filters.  
Choose No if you wish to exit the guided set-up without calculating any room correction filters, without  
saving the performed measurements and without setting the calibration volume.  
 
20  
Calculation of Focus 1 and Global Filters  
When RoomPerfect™ calculates the filters the display shows the following, ‘Calculating filters - Please  
wait’.  
The filter calculation process can be expected to take anywhere between 5 seconds and a minute de-  
pending on the specific task.  
When RoomPerfect™ has calculated the room correction filters, they are automatically saved. The Focus  
filter is saved as setting 1 and Global is saved as setting 9 out of the possible 9 filter settings.  
You have now successfully completed a guided set-up and the RoomPerfect™ Advanced Menu is now  
available.  
 
21  
Advanced Options  
This section describes the options in the advanced menu, which is available after Guided Setup has been  
completed. Here you can add new listening positions and room measurements, check the RoomKnowl-  
edge of your current set-up, and check the RoomCorrection for the different filters.  
Advanced options  
Measure Focus Pos  
Measure Room Pos  
RoomKnowledge  
RoomCorrection  
Measure Focus Pos.  
As mentioned, it is possible to add 7 different listening/focus positions.  
Place the microphone correctly in the new listening position and the measurement process can com-  
mence.  
The saved calibration volume from the guided set-up is used as a default when adding extra focus/listen-  
ing and room positions though, as mentioned, the volume can be changed at any time between meas-  
urements to suit a particular situation.  
After a successful measurement the message ‘RoomKnowledge XX% - Measurement ok’ is displayed.  
Press Enter to continue.  
The message ‘Save Focus measurement(s) – Yes/No’ will appear.  
choose Yes to save the measurement or,  
choose No to exit without saving the current measurement.  
Choose between focus/listening position 2 - 8 and press Enter. If you wish to overwrite an existing Focus  
filter (2 to 8 can be overwritten) or you are trying to save a new filter on an existing preset then ‘Focus  
no.X exists! Overwrite? Yes/No’ will be displayed.  
When the Focus number has been chosen, the volume turns down to default or lower and the new  
Focus filter is calculated and saved.  
Measure Room Pos.  
It is always possible to add more room measurements, which can increase RoomKnowledge and there-  
by fine tune all the room correction filters.  
Press Enter to start a new room measurement.  
Place the microphone in a random room position and the measurement can commence.  
The saved calibration volume from the guided set-up is used as default when adding extra focus/listening  
and room positions, though as mentioned, the volume can be changed at any time between measure-  
ments to suit a particular measurement situation.  
After a successful room measurement the RoomKnowledge is re-calculated and displayed as ‘Room-  
Knowledge XX% - Measurement X ok’. Press Enter to continue.  
 
22  
‘Add more room meas.? Yes/No’ will show in the display:  
choose Yes to add another room measurement or,  
choose No to stop adding more room measurements. If No is chosen the volume is returned to  
the default or lower.  
‘Save room measurement(s)? Yes/No’ will hereafter be shown.  
choose Yes to save the performed room measurement,  
and No to exit without saving any of the performed measurements.  
Adding one or more room measurements leads to a re-calculation of all filters (i.e. Global and all Focus  
filters) due to the fact that more of room’s acoustic properties have been learned, something that affects  
all filters.  
RoomKnowledge  
The RoomKnowledge index is a parameter that tells how much of the room’s acoustical properties have  
been learned. A high RoomKnowledge ( 90%) means that most of the room’s acoustical properties have  
been learned. The more room measurements you add, the higher the RoomKnowledge will become.  
The more that the acoustical properties of the room are learned, the greater the accuracy of the room  
correction.  
RoomCorrection  
The RoomCorrection index is a measure of how much processing is being employed in the room cor-  
rection filters. To some extent the RoomCorrection index reflects how audible the correction is. How-  
ever, the same amount of processing can sound very different due to placement in frequency of the  
processing. For low values (below 10%) of the room correction index, only subtle correction is needed  
to the original sound in the room. With high room correction index values more extensive processing is  
employed.  
The RoomCorrection index for a specific RoomPerfect™ filter can be viewed by pressing the numerical  
button of the corresponding filter. This can only be done while in the RoomCorrection menu.  
 
23  
Display  
The sub menus accessible in the Display menu are:  
Display  
Display Timeout  
Disp. Brightness  
Volume Disp.Timeo.  
Display Timeout  
Display Timeout set-up is used for enabling/disabling the 10 sec. display ’switch’off’ feature. If enabled  
the Main Display reading will switch off after 10 sec of inactivity from the remote control or front panel  
buttons.  
Disp. Brightness  
Display Brightness is used to control the brightness of the display. The brightness can be set to 25%,  
50%, 75% or 100%.  
Volume Disp. Timeo.  
If Volume Display Timeout is enabled the Volume Display reading will switch off after 10 sec of inactivity  
from the remote control or front panel buttons.  
 
24  
Volume  
The sub menus accessible in the Volume menu are:  
Volume  
Def. Volume  
Max. Volume  
Def. Vol.  
The Default Volume setting controls the default volume at start-up and can be set from 0 to 99 dB.  
However, a setting over 88 is not recommended as this corresponds to max output with full scale digital  
input.  
Max. Vol.  
The Maximum Volume setting is a safety precaution used for limiting the maximum volume which can be  
achieved by spinning the wheel or increasing volume via the remote. This can be set to avoid excessively  
loud sound pressure levels and/or to protect your loudspeakers against overload.  
 
25  
Input Name  
Input Name  
As default, digital inputs are called Digital 1-5 and Analog inputs are called Analog 1-4. To change the  
name, choose an input and then between the following preset names:  
ADC,Analog1-4,AUX,CD,CD-1,CD-2,DAB,DAT,DBS,DCC,Digital1-5,DVD,DVD-1,DVD-2,FM,LD,  
MD, PC, PHONO, RADIO, RIAA, SACD, SAT, TAPE, TUNER, TV, VCR, VDP, VIDEO, VIDEO-1,  
VIDEO-2.  
Input Sensitivity  
Input Sensitivity  
The Input Sensitivity adjustment enables you to match levels from different sources as well as obtaining  
full scale output on your amplifier. The Sensitivity can be adjusted +/-12dB in 0.1 dB steps.  
Setting the Input Sensitivity too high will result in clipping/distortion. Therefore,  
always use your ears when setting the Input Sensitivity  
 
26  
Advanced Setup  
The sub menus accessible in the Advanced menu are:  
Advanced setup  
Crossover freq  
Main Out  
Line Out  
Routing  
Trigger setup  
Remote Control  
Firmware versions  
Factory Reset  
Communication  
Master /Slave  
Filter Type  
Delay  
Digital Out  
Communication  
The sub menus accessible in the Communication menu are:  
Communication  
Comm Address  
Comm Speed  
Comm Address  
The Communication Address setting identifies the DPA-1’s to the PC interface or other Lyngdorf prod-  
ucts. In master mode the DPA-1 setting is normally 1, and the addresses 2-99 can be used for individual  
slave pre-amplifiers, but nothing is restricted. The PC software must know the address of the DPA-1 in  
order to communicate with it.  
Comm Speed  
The Communication Speed setting is the RS232 Link interface speed. The default setting is 57600 baud.  
With different PC’s and different lengths of cables the settings can be changed to 9600 or 115200 baud.  
If a multi-amplifier set-up is installed with Master/Slave communication, a smaller delay can be observed  
when using higher speeds.  
Master/Slave  
Master/Slave  
As default a DPA-1 is set as a Slave. If set as a Master the DPA-1 will control the connected applicable  
equipment, e.g. when adjusting the volume control and when switching on and off.  
If updating firmware the DPA-1 must be set in Slave mode in order to communicate with the PC.  
Digital Out  
Digital Out  
It is possible to select if the Digital Output should be the same channel as Main or the same as Line  
Out.  
The Digital Out will have different functions, depending of the setup for Main Out, Line Out and cross-  
over.  
 
27  
Main Out  
The sub menus accessible in the ‘Main Out’ menu are:  
Main Out  
Main Out Control  
Main Out Level  
Main Out Control  
The Main Out Control sets the output level to be Full Scale (fixed) or Regulated (variable).  
Fixed means there’s a constant full scale output – most often used as ‘tape out’ or when using a  
Lyngdorf Audio TDAI or SDAI as a second ‘slave’ amplifier in a bi-amping set-up.  
Regulated (variable) means that the output level will follow the level of the volume control. This setting  
is chosen if you have, for instance, a power amplifier or an active subwoofer connected.  
If Full Scale is selected you will constantly have full output – with huge potential for  
overload and damage of power amplifier and/or loudspeakers if connected.  
Main Out Level  
This adjusts the overall output level in steps of - 0.1 db, it can be attenuated to – 40 dB in total.  
Line Out  
The sub menus accessible in the ‘Line Out’ menu are:  
Line Out  
Line Out Control  
Line Out Level  
Line Out Control  
The Line Out Control sets the output level to be Full Scale (fixed) or Regulated (variable).  
Fixed means there’s a constant full scale output – most often used as ‘tape out’ or when using a  
Lyngdorf Audio TDAI or SDAI as a second ‘slave’ amplifier in a bi-amping set-up.  
Regulated (variable) means that the output level will follow the level of the volume control. This setting  
is chosen if you have, for instance, a power amplifier or an active subwoofer connected.  
If Full Scale is selected you will constantly have full output – with huge potential for  
overload and damage of power amplifier and/or loudspeakers if connected.  
Line Out Level  
This adjusts the overall output level in steps of - 0.1 db, it can be attenuated to – 40 dB in total.  
 
28  
Routing  
Routing  
In Routing it is possible to apply different settings to the Main and Line outputs:  
Symbol  
Name  
Main output  
Line Output  
R
L
Highpass filter  
X
X
R
L
Lowpass filter  
X
X
X
R
L
L
R
Left and Right channel switching  
-
M
Mono  
X
X
-
-
M
Mono lowpass filter  
A highpass and lowpass filter can be applied to the Main and Line outputs when you want to connect an  
additional amplifier or subwoofer together with your main loudspeakers.  
A Mono setting is also available for the Line output, this is used when connecting a single subwoofer to  
just one Line output.  
If no filter is selected the full frequency range will be directed to your main loudspeakers. If a filter is  
selected the frequencies above or below the selecter crossover frequency will be directed through the  
analog line-out and digital Line Out or Main Out terminals.  
When a highpass or lowpass filter has been chosen, the Crossover Frequency and Filter Type menus are  
enabled.  
Crossover Frequency  
Crossover freq.  
Crossover Frequency is only available when Routing has been setup.  
The Crossover Frequency can be selected anywhere between 40 – 9999Hz.  
It is very difficult to give exact guidelines to setting a suitable crossover frequency, filter type and order  
since this depends on the exact drivers and configurations. Therefore, the following recommendations  
should be seen as a good starting point only.  
 
29  
In general, the recommended crossover frequency between (sub)woofers and main speakers is be-  
tween 200 - 400 Hz.  
By using a high crossover frequency, the rear wall quarter wavelength reflection is removed from the  
main speakers.  
If a Lyngdorf Audio boundary woofer is used in a 2+2 set-up, a crossover frequency of 400 is recom-  
mended due to the high bandwidth of the boundary woofer.  
For conventional active subwoofers with built in low pass filter the recommended crossover frequency  
is the upper low-pass frequency of the subwoofer.  
If at all possible, the low pass filter in the subwoofer should be bypassed. Due to the quarter wave  
reflection from the rear wall corresponding to the depth of the subwoofer cabinet we recommend an  
crossover point at approximately 200 Hz. You might experiment with turning the subwoofer so the driver  
faces the wall in a distance of 5 to 10 cm. This will increase the bandwidth of the subwoofer.  
However, due to the limited bandwidth (frequency response) of most conventional subwoofers you  
might find it necessary to choose a lower crossover frequency.  
When ‘building’ active speaker systems it is recommended to use the original crossover point(s) used  
by the manufacturer. Due to the short wavelengths of the mid/high frequencies it is essential that both  
crossover frequency, filter type and order as well as delay is set correctly. Therefore, creating filters for  
active speakers is an iterative process that requires several critical listening sessions in order to achieve  
seamless integration of the different speaker drivers.  
Filter Type  
Filter Type  
Filter Type is only available when Routing has been setup.  
It is possible to choose from two different Filter Types in this menu.  
LiRi: (Linkwitz Riley) 2, 4 or 8 order.  
Butw: (Butterworth) 1, 2 or 4 order.  
In a 2+2 set-up (main speakers + Lyngdorf Audio boundary woofers) we recommend using a fourth order  
Linkwitz Riley filter.  
In set-ups using conventional active subwoofers – again due to limited bandwidth – we recommend us-  
ing a second order butterworth filter.  
In active speaker systems it is recommended starting with a fourth order Linkwitz Riley filter.  
Delay  
Delay  
If you are using a set-up with two main loudspeakers located at an identical distance to the listening  
position you don’t need to set a delay. However, if the distance isn’t identical and/or you are using a sub-  
woofer, or a Lyngdorf Audio 2+2 system, you need to set a delay in order to ensure that the sound from  
each loudspeaker reaches the listening position simultaneously. This must be done for main left (ML) and  
right (MR) and as well as line left (LL) and right (LR).  
To set the delay all you need to do is measure the distance from each loudspeaker to the listening posi-  
tion and enter these values in the menu. The necessary delays are then automatically calculated and  
applied to each channel.  
 
30  
1 centimeter = 0.3937 in  
The fault message ‘Values for delay exceed limits’ is displayed when the difference  
between the distance from the speakers closest to, and the speakers furthest from,  
the listening position is too big. The biggest difference allowed is 340 cm / 134 in.  
If the fault message appears, you can use the following solutions:  
(Can be used individually or together to achieve a valid set-up with respect to the delay lengths):  
Shorten the distances between your Main and Line channel loudspeakers resulting in a more  
compact loudspeaker set-up.  
Arrange your loudspeaker set-up and/or your listening position in a more symmetrical set-up.  
Trigger Setup  
Trigger setup  
Trigger setup sets the usage of the trigger output option. If e.g. SDA2175 is connected to drive a sub-  
woofer from the Line out, the trigger can be activated and used for switching the SDA2175 On and  
Off.  
Remote Control  
Remote Control  
Remote Control set-up makes it possible to activate or de-activate the remote control.  
Firmware Versions  
Firmware versions  
The Firmware Versions menu is used to check the current firmware version of your DPA-1 and the Room-  
Perfect™ module as well as the RoomPerfect™ serial number.  
Factory Reset  
Factory Reset  
The Factory Reset setting is used to restore all settings, including RoomPerfect, in the DPA-1 to the fac-  
tory settings.  
If you return to the factory settings all your personal settings will be erased.  
 
31  
RoomPerfect™ Troubleshooting  
No microphone connected  
The error message ‘No microphone connected’ is displayed when no microphone is connected to the  
DPA-1.  
Solution:  
Connect the microphone on input on the back panel.  
No signal  
1. The error message ‘Fault – No signal’ is displayed when the incoming signal is classified as  
pure noise. This happens when the measuring signal is too low compared with the noise  
from the local environment. This could be due to there being too much noise in your  
measuring environment.  
2. The above error message is also displayed when the loudspeakers are not connected and/or  
Mute is activated.  
Solution:  
• Raise the measuring signal volume before continuing with the measurement.  
• Connect your loudspeakers and/or de-activate Mute.  
Signal clipping  
1. The error message ‘Fault – Signal clipping’ is displayed when the incoming signal is  
classified as too loud resulting in clipping (distortion).  
2. A loud noise from the local environment that has corrupted the measurement results in this  
error message.  
Solution:  
• Lower the measuring signal volume before continuing with the measurement.  
• Repeat the measurement with no changes; however refrain from making excessive noise  
when measuring.  
Low signal  
The error message ‘Fault – Low signal’ is displayed when the measurement has taken more than 5  
minutes for the low frequency signal or 2 minutes for the high frequency signal. This happens most  
often when using a low measuring signal compared to the background noise of your environment,  
something that results in prolonged measuring times.  
Solution:  
• Raise the measuring signal volume before continuing with the measurement, or reduce the  
noisy elements in your environment.  
 
32  
Firmware Upgrading  
The DPA-1 firmware can be upgraded using the ‘Lyngdorf Audio – Serial Load’ software. This is in the PC  
Follow the upgrade steps shown below to bring the product into upgrade mode.  
 
33  
Connectors  
Mains Connector  
Mains voltage to the DPA-1 is applied via an IEC320 type connector. The supplied cable with safety  
ground should be used to connect the DPA-1 to a mains outlet.  
Make sure the rear selector is in the correct setting and connect the power input  
only to the appropiate AC source. The warranty will not cover any damage caused  
by connecting to the wrong type of AC mains.  
Always disconnect the DPA-1 from the mains before changing any connections to  
its inputs or outputs.  
Trigger Connector  
The DPA-1 is equipped with a TRIGGER OUT 3.5mm mono jack connector. The trigger signal is a 12V  
short circuit-protected output signal for powering up external equipment when the DPA-1 is on, e.g. re-  
motely connected SDA 2175 power amplifiers or active subwoofers.  
AD Converter Board  
The AD Converter card for the DPA-1 has input connectors for both balanced (XLR) and unbalanced (RCA)  
analog signals. The input impedance of the inputs are 10 kOhm.  
Balanced Inputs  
The balanced XLR inputs are wired in accordance with IEC268:  
Pin 1: Chassis and ground.  
Pin 2: Hot (+).  
Pin 3: Cold (-).  
Shell: Chassis and ground.  
Unbalanced Inputs  
The unbalanced RCA inputs are wired in accordance with normal practice:  
Shell: Chassis and ground.  
Pin: Hot (+).  
Cleaning and Maintenance  
This unit does not require any regular maintenance except to keep its exterior clean. Simply wipe its exte-  
rior with a clean soft cloth. A small amount of non-abrasive cleaner may be used on the cloth to remove  
any excessive dirt or fingerprints. Do not use abrasive cleaners or cleaners containing liquid solvents.  
 
34  
Technical Specifications  
Audio  
Parameter  
Value  
Note  
Balanced input connectors  
3 pin XLR, gold-plated.  
Case=Gnd, Pin1=Gnd,  
Pin2=Hot(+), Pin3=Cold(-)  
Balanced input impedance  
Unbalanced input connectors  
Unbalanced input impedance  
DAC Out impedance  
10KOhm  
AC-coupled.  
RCA (phono) jack, gold-plated.  
Case=Gnd, Tip=Hot(+)  
AC-coupled  
10KOhm  
50Ohm  
Gain According to volume con-  
trol setting. 88 dB = 0 dB with  
sensitivity normal and rel.  
volume 0 dB  
Input sensitivity  
4.4V (2.2V with high sens.)  
4.4Vrms  
Unbalanced output  
Balanced output  
8.8Vrms  
Frequency Response 20 - 20KHz +/-0.1dB  
RoomPerfect Highpass Filter  
-3dB at 18Hz  
THD+N A-wgt  
Digital to Analog  
-103dB  
-113dB  
-113dB  
-110dB  
-119dB  
-119dB  
-103dB  
-113dB  
-113dB  
-114dB  
Neutral voicing - ref 4.4V  
Neutral voicing - ref 4.4V  
Neutral voicing - ref 4.4V  
Neutral voicing - ref 4.4V  
Neutral voicing - ref 4.4V  
Neutral voicing - ref 4.4V  
Neutral voicing - ref 4.4V  
Neutral voicing - ref 4.4V  
Neutral voicing - ref 4.4V  
AC Sweep from 125 - 16KHz  
S/N Ratio  
Digital to Analog  
Dynamic Range  
Digital to Analog  
THD+N A-wgt  
Analog to Digital  
S/N Ratio  
Analog to Digital  
Dynamic Range  
Analog to Digital  
THD+N A-wgt  
Analog to Analog  
S/N Ratio  
Analog to Analog  
Dynamic Range  
Analog to Analog  
Channel Separation  
All audio measurements, except frequency response, are measured with a 20KHz low-pass filter in  
accordance with AES-17.  
 
35  
Protection  
Parameter  
Grounding  
Value  
Note  
Mains earth, chassis and audio  
ground are connected internally.  
Over temperature  
Mains-transformer.  
Auto resetting thermal fuse in  
mains transformer.  
Mains  
Parameter  
Value  
Note  
Mains input connector  
Mains voltage range  
Power consumption  
Power consumption  
IEC 320 cold type  
100-240V AC, 50–60Hz  
4 W  
Mains lead supplied.  
STANDBY mode.  
OPERATE mode  
35 W  
Trigger  
Parameter  
Value  
Note  
Trigger Out connector  
Trigger Out voltage  
Trigger Out Current  
3.5mm (1/8”) mono jack  
Case=Gnd, Tip=Input  
Short circuit protected  
12V DC  
50mA  
Mechanical  
Parameter  
Width  
Value  
Note  
450mm (17.72”)  
440mm (17.32”)  
100mm (3.94”)  
7.4Kg (16lb.)  
10.8Kg (23.8 lb.)  
Depth  
Height  
Including feet.  
Net weight  
Shipping weight  
Two shipping boxes.  
 
36  
Technical Assistance  
For latest version of the firmware, newest version of this document and ‘Questions and Answers’,  
please check the ‘Support’ section on the Lyngdorf Audio website.  
If you have any problems with or questions regarding your Lyngdorf Audio product, please contact  
your nearest Lyngdorf Audio representative or:  
Lyngdorf Audio ApS  
Denmark  
 
37  
Appendix  
Voicing Curves  
For further information on the Voicing setting, please refer to the “Voicing” chapter.  
Music 1  
Music 2  
Magnitude R esponse: Music  
1
Magnitude R esponse: Music  
2
6
4
2
6
4
2
0
-2  
-4  
-6  
0
-2  
-4  
-6  
10 Hz  
100 Hz  
1kHz  
10kHz  
10 Hz  
100 Hz  
1kHz  
10kHz  
Frequency (Hz)  
Frequency (Hz)  
Relaxed  
Open  
Magnitude R esponse: R elax ed  
Magnitude R esponse: Open  
6
4
2
6
4
2
0
-2  
-4  
-6  
0
-2  
-4  
-6  
10 Hz  
100 Hz  
1kHz  
10kHz  
10 Hz  
100 Hz  
1kHz  
10kHz  
Frequency (Hz)  
Frequency (Hz)  
Soft  
Open Air  
Magnitude R esponse: S oft  
Magnitude R esponse: Open Air  
6
4
2
6
4
2
0
-2  
-4  
-6  
0
-2  
-4  
-6  
10 Hz  
100 Hz  
1kHz  
10kHz  
10 Hz  
100 Hz  
1kHz  
10kHz  
Frequency (Hz)  
Frequency (Hz)  
 
38  
 
39  

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