KRK ERGO User manual

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IMPORTANT SAFETY INSTRUCTIONS
CAUTION: THE LIGHTNING FLASH WITH AN ARROWHEAD SYMBOL WITHIN AN EQUILATERAL
TRIANGLE IS INTENDED TO ALERT THE USER TO THE PRESENCE OF UN-INSULATED DANGEROUS
VOLTAGE WITHIN THE UNITS ENCLOSURE THAT MAY BE OF SUFFICIENT MAGNITUDE TO
CONSTITUTE A RISK OF ELECTRIC SHOCK TO PERSONS.
WARNING: THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT
THE USER TO THE PRESENCE OF IMPORTANT OPERATING AND MAINTENANCE (SERVICING)
INSTRUCTIONS IN THE LITERATURE ACCOMPANYING THE PRODUCT.
NOTE: THE HAND WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE USER TO
SPECIFIC GUIDANCE AND INFORMATION REGARDING THE OPERATION OF THE UNIT, AND SHOULD
BE READ FULLY BEFORE USING THE UNIT FOR THE FIRST TIME.
CAUTION: TO REDUCE THE RISKS OF FIRE OR ELECTRIC SHOCK DO NOT REMOVE ANY COVERS,
OR OPEN THE UNIT. THERE ARE NO USER-SERVICABLE PARTS INSIDE. ALL SERVICING SHOULD BE
REFERRED TO QUALIFIED SERVICE ENGINEERS.
WARNING: READ AND FOLLOW ALL THE SAFETY AND OPERATING INSTRUCTIONS BEFORE
CONNECTING OR USING THIS UNIT. RETAIN THIS USER MANUAL FOR FUTURE REFERENCE. ALL
WARNINGS ON THE UNIT AND ITS PACKAGING SHOULD BE READ AND FOLLOWED.
WARNING: This product contains a chemical known to the State of California to cause cancer and birth defects
or other reproductive harm.
CAUTION: To reduce the risks of fire or electric shock do not expose this product to rain or moisture. Do not
use this product near water; for example, near a bath tub, washbowl, kitchen sink, laundry tub, in a wet
basement or near a swimming pool. Unplug the unit from the wall outlet before cleaning. Never use thinner,
cleaning fluids, solvents or chemically impregnated cloths. For cleaning always use a soft dry cloth. Unplug this
product during lightning storms or when unused for long periods of time.
.
CAUTION: The unit should be installed so that its location or position does not interfere with its proper
ventilation. For example, it should not be situated on a bed, sofa, rug or similar surface that may block the
ventilation openings; or placed in a built-in installation, such as a bookcase or cabinet, that may impede the flow
of air through its ventilation openings. The unit should be situated from heat sources such as radiators, heat
registers, stoves or other devices (including amplifiers) that produce heat. No naked flame sources, such as
lighted candles, should be placed on, or near the unit.
WARNING: Do not place this unit on an unstable surface, cart, stand or tripod, bracket or table. The unit may
fall, causing serious injury to a child or adult and serious damage to the unit. Use only with a cart, stand, tripod,
bracket or table recommended by the manufacturer or sold with the unit. Any mounting of the device on a wall
or ceiling should follow the manufacturer’s instructions and should use a mounting accessory recommended by
the manufacturer. An appliance and cart combination should be moved with care. Quick stops, excessive force
and uneven surfaces may cause the appliance and cart combination to overturn. Use only with the cart, stand,
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 tip-over.
NOTE: Should the unit become damaged beyond repair, or reaches the end of its life, please consult the
regulations regarding disposal of electronic products in your region.
NOTE: KRK Systems, LLC cannot be held responsible for damage, and, or including data loss caused by
improper use of the unit and or the applications provided for use with the unit.

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IMPORTANT SAFETY INSTRUCTIONS
CAUTION TO PREVENT ELECTRIC SHOCK, MATCH WIDE BLADE OF PLUG TO WIDE SLOT FULLY
INSERT.
ENGLISH:The apparatus shall be connected to a Mains socket outlet with a protective earthing connection.
GERMAN:Das Gerät ist eine Wandsteckdose mit einem Erdungsleiter angeschlossen werden.
FRENCH:L'appareil doit être connecté à une prise secteur avec connexion à la terre.
SPANISH:El aparato estará conectado a una toma de red eléctrica con una conexión a tierra.
ITALIAN: L'apparecchio deve essere collegato a una presa di rete con una connessione a terra protettiva.
1. The unit and power supply should only be connected to a power supply outlet only of the voltage and
frequency marked on its casing.
2. Protect the power cable from being walked on or pinched particularly at plugs, convenience receptacles,
and the point where they exit from the apparatus.
3. 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 is provided for your safety. If the provided plug does not fit into your outlet,
consult a qualified electrician for replacement of the obsolete outlet.
4. If the mains plug supplying this product incorporates a fuse then it should only be replaced with a fuse of
identical or lower rupture value.
5. Never use a damaged or frayed power cable; this can introduce serious risk of exposing lethal voltages.
6. The power supply cable of the unit should be unplugged from the wall outlet when it is to be unused for a
long period of time.
7. Only use attachments/accessories specified by the manufacturer.
DO NOT ATTEMPT SERVICING OF THIS UNIT YOURSELF. REFER SERVICING TO QUALIFIED SERVICE
PERSONNEL.
Upon completion of any servicing or repairs, request the assurance that only Factory Authorized Replacement
Parts with the same characteristics as the original parts have been used, and that the routine safety checks
have been performed to guarantee that the equipment is in safe operating condition.
REPLACEMENT WITH UNAUTHORIZED PARTS MAY RESULT IN FIRE, ELECTRIC SHOCK OR OTHER
HAZARDS.
ATTENTION POUR …VITER LES CHOC ELECTRIQUES, INTRODUIRE LA LAME LA PLUS LARGE DE LA
FICHE DANS LA BORNE
CORRESPONDANTE DE LA PRISE ET POUSSER JUSQUíAU FOND.
This unit should be serviced by qualified service personnel when:
The power cord or the plug has been damaged
Objects have fallen, or liquid has been spilled into the unit
The unit has been exposed to rain or liquids of any kind
The unit does not appear to operate normally or exhibits a marked change in performance
The device has been dropped or the enclosure damaged.
REGULATORY CERTIFICATION
KRK declare under our sole responsibility that this product, to which this declaration relates, is in conformity with the
following standards:
The Declarations of Conformity can be obtained from 382 Ave. de la Couronne, B-1050 Brussles
Authorized European representative: Phone: [phone] Fax: [phone]

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Contents
Introduction ............................................................................................................................................................ 5
1.Method of Use ................................................................................................................................................ 5
2.ERGO and RoomPerfect™.............................................................................................................................. 6
3.Features ......................................................................................................................................................... 7
5.How ERGO works ............................................................................................................................................ 8
6.System Block Diagram.................................................................................................................................... 8
7.Back Panel Connections.................................................................................................................................. 9
8.Front Panel Features..................................................................................................................................... 10
9.Placing your Monitoring System................................................................................................................... 11
10.Stereo Monitor Placement............................................................................................................................ 12
11.Subwoofer Placement .................................................................................................................................. 13
12.Setting Monitor and Subwoofer Levels......................................................................................................... 14
13.Connecting ERGO to your monitoring system ............................................................................................... 15
19. Connecting ERGO to your computer.............................................................................................................. 20
20.1394/Firewire considerations....................................................................................................................... 21
21.Preparing for Software/Driver Installation.................................................................................................... 22
22.Installation for Microsoft Windows Systems................................................................................................. 23
23.Installation for Apple Mac OSX Systems........................................................................................................ 26
24.ERGO Calibration .......................................................................................................................................... 29
25.Using ERGO Calibration Software (ERGO Cal) ................................................................................................ 30
26.ERGO Control Panel (Windows / Mac OSX).................................................................................................... 40
27.Specifications ............................................................................................................................................... 44
28.Frequently Asked Questions (FAQs) .............................................................................................................. 45
29.Troubleshooting........................................................................................................................................... 47
30.Glossary........................................................................................................................................................ 49
31.Further Assistance: ....................................................................................................................................... 51
32.LEGAL........................................................................................................................................................... 51

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Introduction
Thank you for purchasing your ERGO Room Correction and Audio Interface system. If you are already a KRK thanks for
your continued use and support of our products. If you are new to KRK we are pleased that you chose ERGO as your
room correction, we welcome you to our continually growing number of users. At KRK we strive to achieve the most
honest, natural reproduction of your hard work. We encourage you to visit our website to see our industry standard
Rokit monitors, class leading VXT monitors, Subwoofer solutions and the latest addition to the KRK portfolio, the KNS
series headphones.
ERGO (Enhanced Room Geometry Optimization) is an exciting product that enhances the performance of any
loudspeaker/monitoring system by digitally correcting both common and complex acoustic problems in the room.
1. Method of Use
ERGO can be used in two main ways:
a. As an audio interface (with room correction) to hardware running Apple Mac OSX (Core Audio) or
Microsoft Windows (DirectX-WDM/ASIO) operating systems, allowing full access to audio input and outputs
for recording and monitoring, and room-correction.
b. As a stand-alone room correction device which sits “in-line” with your monitoring signal path. This
requires connection to your Apple Mac OSX or Microsoft Windows hardware for the room calibration process
only, once complete ERGO can be disconnected to use in stand-alone mode providing room correction to the
line input signal and supplying the corrected signal to your monitoring system
Both methods allow the following room correction options:
a. Dual Monitoring System
Two sets of stereo monitors which can be A/B switched from ERGO’s front panel
b. 2.1 Monitoring System
A single set of stereo monitors and a dedicated subwoofer, in this mode the main monitors and the
subwoofer can be individually muted when required
ERGO’s functionality is consistent between modes and all operational aspects are identical. For more on the
functionality please see the section on connecting ERGO.

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2. ERGO and RoomPerfect™
As the room itself is one of the most important factors when considering the re-production of audio signals it makes
sense to take this issue seriously.
Room acoustics is without doubt a complex science and while we endorse and encourage physical room treatment we
also understand that it can be fraught with difficulty and without proper expertise can often lead to undesirable
results. Using baffles can sometimes results in timing and precision errors in the low frequency response of the room.
Room issues such as resonance, ringing, absorption and reflections can be highly complex by nature and treatment
can often have unwanted side effects. In the age of the project/professional studio quite often the room is a
compromise, which can’t be easily negated. Finally in a studio, which is constantly evolving with new equipment,
and structure changes associated with them mean any previous physical correction results could be destroyed.
ERGO utilizes the RoomPerfect algorithm licensed from what we consider to be the authority on room correction,
Lyngdorf Audio. This technology developed in Denmark uses highly complex test tones, multiple measurements and
over one thousand EQ points to control your audio environment. The system can derive data on room modes, power
response, directivity and LF roll-off, which inferior modes of correction do not account for. The RoomPerfect
technology is exclusively licensed for KRK ERGO.
One fantastic advantage of ERGO’s implementation of RoomPerfect is the Focus and Global modes of operation. In
Focus mode the monitoring position/sweet spot is corrected and is the setting, which should be used during mixing.
In Global mode the signal processing power is applied in a different way to correct the whole room, ideal for when
artists, producers, A&R people want to all be in the room and it still sound right.
An important thing to note regarding the RoomPerfect algorithm is that one of the main advantages when compared
to other methods of room correction. This ability to act as non-destructive correction actually maintains the character
of your monitoring system. RoomPerfect does not try to remove the issues such as reflections and absorption as these
are required to give us spatial positioning references, it actually adapts to them in a corrective manner.
The RoomPerfect algorithm in ERGO works on frequencies up to 500Hz, which equates to around 2ft, this works well
in the studio environment where the user is working in a near-field mode and has a considerably smaller sweet spot
than that of the home theatre. Lyngdorf offer a high end full-bandwidth solution for home theatre systems based on
the same algorithms, which is considered by many to be one of the industry leading solutions.
Once your room is calibrated and ERGO is applying the RoomPerfect correction, you will notice the difference. Over
time you will be able to “trust” the sound of your room, concentrate on your music, mix faster and more accurately,
with results that will properly translate to other listening environments.
To read more about RoomPerfect and its benefits please visit the Lyngdorf Audio website: http://www.lyngdorf.com/

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3. Features
High-performance, state-of-the-art Digital Signal Processor for room correction and analysis
Mastering grade Analog-to-Digital and Digital-to-Analog converters
Can be used as an Audio Interface with room correction, or Stand Alone room correction
Balanced ¼” TRS Line Inputs
Balanced ¼”Line Outputs for dual system connection (A/B) or 2.1 Connection (A+B)
Large Illuminated Analog Volume Control
Illuminated Headphones control
Illuminated Monitor Selection buttons
Focus/Global/Bypass Mode controlled by illuminated button
Patented RoomPerfect™ technology corrects phase and frequency problems
ERGO Cal Software compatible with OSX and Windows platforms.
Professional calibrated measurement microphone and microphone stand adapter.
As ERGO uses new some new technology you may not be familiar with, please refer to the glossary at the back of this
manual to get more information about any of the terms used.
4. ERGO Package
Your ERGO package contains the following items:
ERGO hardware interface, containing the monitoring controls, Digital Signal Processing, A/D-D/A
convertors and input/output connectors.
ERGO Microphone – Calibrated measurement microphone used when calibrating the room only
ERGO Microphone Adapter, If your microphone cable has an XLR connection, this cable allows it to be
converted to a ¼” TRS connection for use with ERGO.
ERGO Installation Disc – This contains the relevant installer for your system and an electronic copy of this
user guide.
6-pin to 6-pin 1394a (Firewire 400) cable for connecting ERGO to your OSX or Windows hardware.

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5. How ERGO works
ERGO takes a stereo audio stream from the analog or digital (S/PDIF or FireWire input) domain and processes it
though a 96 kHz room correction algorithm. All incoming analog audio is sampled at 96 kHz, while incoming digital
audio is sample rate converted up to 96 kHz for processing. If incoming audio comes in over FireWire, the processed
audio is converted to reflect the output frequency of the ASIO driver, up to 96 kHz. In Digital Input mode, the output
frequency and the audio going to your monitors is going through digital to analog converters fixed at 96 kHz sample
rates.
ERGO’s architecture provides the best audio quality while maintaining compatibility with existing systems. In fact, the
audio converters used in ERGO are the same as those found in multi-thousand dollar audio workstation hardware.
6. System Block Diagram
Below is shown the internal architecture and signal path:

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7. Back Panel Connections
Power On Switch – This turns the unit on/off.
A.
Power Input Socket – This accepts a 12V/1A input from the power supply included with ERGO.
B.
Firewire Ports - These 2 ports allow connection and daisy chaining of FireWire devices.
C.
S/PDIF Digital Input – This allows connection of a digital input source from a playback device or another
D.
audio interface.
Calibration Microphone Input - This jack is used to connect the ERGO measurement microphone. It is
E.
only used during the calibration process. It is recommended that you only use the microphone supplied
with ERGO for room calibration. ERGO supplies a 15V phantom power source to its microphone, and using
other microphones for calibration may result in poor room analysis and improper correction filters.
Balanced ¼” TRS Analog Line Inputs – These connections are used either as inputs from your existing F.
audio interface or as recording inputs from a mixer, or rack channel.
Calibrate Button – This requires switching manually during the calibration process, you will be told when
G.
to engage and disengage it.
Balanced ¼” TRS Analog Line Outputs – These connections are used to connect to your monitoring
H.
system. Dual monitor systems can be connected to A/B, or 2.1 systems with subwoofers can be connected
to A+B.
Headphones Output – Headphones can be connected here to monitor the signal being sent to your
I.
monitors, or as an individual Solo/Cue feed.
Kensington™ Security Lock – Used to secure the unit via a Kensington Security Device (purchased
J.
separately if required)

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8. Front Panel Features
A – This button will select the A monitoring system if using in dual monitor mode, this button will
A.
enable/disable the main monitors if used in a 2.1 audio system..
B/SUB – This button will select the B monitoring system if using in dual monitor mode, this button will
B.
enable/disable the subwoofer if used in a 2.1 audio system.
Focus/Global/Bypass – This button switches between three modes: FOCUS (Illuminated), GLOBAL (off) C.
and BYPASS (Flashing). Note: to put ERGO into bypass mode you must press and hold this button.
Clip Indicator – This will illuminate red when audio is 3dB below full scale, indicating a likely clip
D.
condition.
Power / Firewire Indicator – This will illuminate GREEN to show power is ON and the Firewire connection
E.
is operational. This will illuminate RED to show power is ON and the unit is in Stand-Alone mode.
Calibration Indicator – This will illuminate when the calibrate button is ON.
F.
Volume/Level Control – This large high resolution control adjusts the output level sent to your selected
G.
monitoring system
Headphones Level Control (Located on Side Panel) – The headphones output level control is an
H.
illuminated dial on the left hand side of the unit. NOTE: The high quality headphone amp in ERGO is
capable of providing a high output level to certain headphones, please start with a low level and rise slowly
to maintain comfortable and non-damaging levels. Your ears are the most important tools of your trade.

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9. Placing your Monitoring System
Your monitors may already be positioned exactly where you need them for many other reasons, if this is the case you
can move to the next section and start connecting ERGO.
If you are positioning your monitors for the first time, or have an opportunity to re-position your monitors we strongly
advise reading this section. One of the great advantages of ERGO and the RoomPerfect technology is overcoming
some traditional limitations.
When it comes to placement of traditional monitors it is actually possible to think differently with ERGO because of
its use of RoomPerfect™, i.e. to break away from conventional ‘free space’ placement.
Normally, you need to choose a monitor placement well away from rear and sidewalls to secure the best possible
frequency response. Due to the fact that a traditional monitor has Omni polar dispersion in the bass region, this ‘free
space’ placement has a big disadvantage namely that you actually risk ‘destroying’ the impulse response. The reason
for this is that you hear both the direct sound from the speaker and later all the reflections from the walls. The
reflections are delayed as a consequence of the distance to the walls and will therefore arrive later thus smearing the
‘attack’ of e.g. a drumbeat. Typically back wall reflections are the most annoying because they arrive from the same
direction as the direct sound from the loudspeaker. Sidewall reflections are easier for the brain to cope with because
they arrive from another direction. Therefore they are often regarded as adding ambience and localization clues.
The close or near-field monitor reduces room interaction. This can be compared to the conventional stereo
configuration or the large monitor arrangement in a recording studio where sounds emanating from the monitor or
reflecting off ceilings, walls, and floors greatly affect the sound quality.
If you place the loudspeaker close to the back wall the bass reflections from the wall and the direct sound will arrive
simultaneously at the listening position – i.e. the impulse response in the bass region can be improved considerably
and ERGO can easily compensate for the uneven frequency response as a consequence of the placement. So, with
ERGO it can actually be an advantage to choose what’s normally regarded as a less ideal ‘close wall‘ loudspeaker
placement as this will not only improve the impulse response.
Also, when compensating for the increased efficiency, the load on both amplifier and loudspeaker is decreased
resulting in less distortion and better headroom is achieved. And taking energy out of the system also has another
advantage because delivering less energy into the room means that room modes are less excited. From this a much
more even power response across the room is achieved – i.e. the differences between peaks and dips in the response
are reduced dramatically.
The result you see after calibration is that the “Room Correction Index” will also be quite high since correction in the
bass region is needed. However, the index number is not high because you have a ‘poor’ system – it’s high just
because you have chosen a loudspeaker position that improves the impulse response but then requires compensation
for the increased efficiency in the bass region. Try it out and see what works for you – near wall or ‘free space’
placement - ERGO works in both cases.

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10. Stereo Monitor Placement
There are two basic elements to consider before achieving the best possible performance from your monitors:
a. Room Correction / Treatment - either acoustic, or digital (as ERGO) or a combination of these methods.
b. Optimal Positioning – This covers the placement of all monitors, and subwoofers in the room.
If you attempt any kind of acoustic treatment we recommend you hire a qualified studio acoustician who can identify
and rectify the acoustic shortcomings of your control room. You will hear a lot of talk about standing waves, flutter,
decay time, absorption and reflection, and it may be expensive, but if you run a commercial recording space, consider
it the cost of doing business. If you plan to use ERGO only, without acoustic room treatment this
Section will take you through the procedure of placing your monitors using some common examples.
Where to Start?
Typically, they should be placed so that that the listening position is fully “covered” with all monitors resting on the
same horizontal plane. To test a monitor for its imaging capability, playback a song that includes acoustic
instruments, to fully represent the entire sound spectrum. You can adjust the angle of each monitor by listening for
dead spots. Keep in mind, changing the angle or position of a monitor will change the way that you perceive your
music. So let’s analyze a few examples:
Close / Near-Field
In a control room, the monitors are frequently placed on the meter bridge or in a close-field listening position of a
DAW workstation console. Initial placement starts by measuring out a simple equilateral triangle (all three sides
equal in length) with the apex at the center of the listening position (as shown in Figure 1) as an “overlay” for the
stereo installation. In this configuration, the Left and Right monitors are each placed at a 60º angle equidistant from
the listening position.
Mid-Field / Rear Stands Positioning
This configuration is similar to the close/near-field configuration. It is normally used with larger monitors or when the
monitors are too large or heavy for the meter bridge. This set up has the potential for a larger sweet spot and better
spatial imaging. Make sure that the height of the woofer cone is above the height of the console to avoid reflections
and comb filtering effects.

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11. Subwoofer Placement
Note: A properly set up subwoofer system extends the bass response of the main stereo monitors down into the 30-
Hz range, but without exaggerating bass response in the room. Improper setup may cause an exaggeration of bass
response in the room, which in turn may cause the engineer to mix in less bass energy than desired. We recommend
paying close attention when configuring your subwoofer.
Bass frequencies are largely non-directional, however that does not mean that you should ignore the subwoofer's
placement in the room. If fact, a sub's physical position in the room in relation to the floor, walls and other surfaces
radically influences its bass response. In a monitoring situation, it is desirable to place the subwoofer so that it
produces the smoothest frequency response at the listening position. In addition, since the subwoofer's output will
interact with the other monitor speakers in the room, it is important to consider the subwoofer and near-field
speakers as a total system.
If you have access to a Real Time Analyzer and a calibration microphone, then setting up the room can be fairly
painless. There are good selections of iPhone/Smartphone applications which will allow your device to measure SPL.
However, it can also be done with a generic SPL meter, or even your own ears, once you know what to listen for.
What you are attempting to do is find a place in the room where the subwoofer interacts smoothly with the acoustics
to even out the bass response at the listening position. One way to do this is to reverse the normal position of the
subwoofer and listening spot by temporarily moving the subwoofer to your seat position in front of the console. Then
play back pink noise in the 30 to 80 Hz range or music with robust bass information. Now by moving the SPL meter (or
your ears) around the various potential speaker positions in the room, you can listen for where the bass sounds the
loudest. That is where the speaker loading would potentially be at its greatest. Once you find the optimal spot, place
the subwoofer at that position and listen to it from the console position. Even without an SPL meter you can then use
stepped band-pass, pink noise and sine-wave sweeps to evaluate how even the bass response is. Move the subwoofer
around a foot at a time until the bass response is as even as possible at the listening position.

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12. Setting Monitor and Subwoofer Levels
Once the stereo monitors and subwoofer are in position, their levels need to be matched. The process is
straightforward and is described below:
Obtain an SPL (Sound Pressure Level) meter, these are very cheap and are now commonly available as
Smartphone/iPhone applications. Set the low-pass filter on the subwoofer back plate to 80 Hz
Send a one octave wide, band-pass pink noise signal to your monitoring system (the main speakers from ERGO, or
from the subwoofer if using the internal crossover). A good choice is 500 to 1,000 Hz band-passed pink noise, which is
within the fundamental frequency range of many vocalists, and minimizes high-frequency problems but doesn't
excite the subwoofer. Adjust your main monitors until you reach a comfortable monitoring level. (Typically 85
decibels SPL using the C response curve on the SPL meter)
Next, route 1-octave, band-passed, bass pink noise to the subwoofer to the monitor system. A good noise choice is 35
to 70 Hz, which is below the 80-Hz frequency of the subwoofer high-pass filter, but sufficiently high enough that
most subwoofers will have adequate response in that band. Set the gain of the subwoofer level control until it
matches the same 85-decibel SPL level. Then, turn up the low-pass filter control on the subwoofer to 130 Hz. This
allows the bass energy between the near-field speakers and subwoofer to overlap.
Listen from the mix position and route pink noise with a band-pass of 80 Hz to 130 Hz to your monitoring system.
Have someone adjust the phase on the subwoofer (ideally a full 360 degrees), and then back, and note the position
which sounds loudest. The loudest position is correct and in phase. Now return the low-pass filter to the 80-Hz
position (or another frequency if you are using external high-pass filters for the near-field speakers).
Your system should now be properly aligned for phase, level and spectral response.

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13. Connecting ERGO to your monitoring system
ERGO is very flexible, it has connections which allow it to be integrated into several different configurations. The
following pages cover some of the more common examples.
Note: At this point now your monitors are positioned you should choose your configuration and make a note of it
then move to the next section and begin Installing ERGO.
14. Connecting ERGO as an audio interface with a dual stereo monitoring system
Below is the standard configuration when using ERGO as an audio interface with room correction for two pairs of
stereo studio monitors:

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15. Connecting ERGO as an audio interface with a 2.1 monitoring system
Below is the standard configuration when using ERGO as an audio interface with room correction for a single set of
stereo monitors augmented by a subwoofer. Here ERGO allows the user to adjust the crossover frequency from the
control panel while you are in the sweet spot. The subwoofer can also be muted from the control panel.

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16. Connecting ERGO to an audio interface using dual 2.1 monitoring systems.
Below is the standard configuration when using ERGO as an audio interface with room correction for two pairs of
stereo studio monitors, both augmented by subwoofers. Here the subwoofer takes the signals from audio and
performs crossover functionality before passing the high pass filtered output to the main monitors, Note: in this
configuration the sub can only be bypassed using a footswitch where possible. Note: ERGO uses a mono summed
signal from the B Left output only, this should be the only connection you make to your subwoofers LEFT input.

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17. Connecting ERGO as a “stand-alone” device
Below is the standard configuration when using ERGO as stand-alone device. Here ERGO simply sits in the path of
your existing monitor feed. In this mode ERGO will perform correction on the signal appearing at either the digital or
analog inputs. Note: The digital inputs are treated as a priority, so if an S/PDIF source is connected it will be used
instead of the analog input. If you wish to use the analog inputs please ensure a digital source is not connected.
In this mode, the controls all operate according to the mode calibrations were performed (with or without
Subwoofer). Below a 2.1 system is shown, you can also apply the same principle using a dual stereo monitoring
system. Note: ERGO uses a mono summed signal from the B Left output only, this should be the only connection you
make to your subwoofers LEFT input.

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18. Connecting ERGO to an existing audio interface
This configuration is identical to using ERGO as stand-alone device. Here ERGO simply sits in the path between your
existing audio interface and your monitors. In this mode ERGO will perform correction on the signal appearing at
either the digital or analog inputs. Note: The digital inputs are treated as a priority, so if an S/PDIF source is
connected it will be used instead of the analog input. If you wish to use the analog inputs please ensure a digital
source is not connected.
In this mode, the controls all operate according to the mode calibrations were performed (with or without
Subwoofer). Below a simple dual monitor system is shown, you can also apply the same principle using a 2.1 system.

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19. Connecting ERGO to your computer
System Requirements
A.
Note: If using in Stand-Alone mode a connection to an Apple Mac OSX, or Microsoft windows computer is only
required for performing room measurement and analysis.
The Minimum required computer specifications for calibration or use as an audio interface (with room correction)
are listed below:
Microsoft Windows 7 (32/64-bit)
Microsoft Windows Vista (32/64-bit)
Microsoft Windows XP (SP2 or later) (32-bit)
1GB RAM, 10 MB hard disk space, 800 x 600 monitor resolution (or higher)
4 or 6-pin FireWire port (6-pin port required to FireWire to supply power to ERGO)
AC outlet (for ERGO power supply if power is not supplied via FireWire).
Apple Mac OSX 10.6.x (Snow Leopard 64-bit)
Apple Mac OSX 10.5.x (Leopard 32-bit)
Apple Mac 10.4.x is not supported, but can be utilized by using Apple FireWire driver 2.2.0.
1GB RAM, 10 MB hard disk space, 800 x 600 monitor resolution (or higher)
4 or 6-pin FireWire port (6-pin port required to FireWire to supply power to ERGO)
AC outlet (for ERGO power supply if power is not supplied via FireWire).
c. Power considerations
ERGO can be powered in two ways:
External Power Supply – This requires use of the supplied 12VDC/1A supply, which is included.
Firewire Bus Power – Using the power provided by the Firewire port (if available), please see more
information on Firewire bus power in the next section.