Yamaha DJ Equipment IMX644 User Manual

Owner's Manual  
EN  
 
Explanation of Graphical Symbols  
The lightning flash with arrowhead symbol  
within an equilateral triangle is intended to  
alert the user to the presence of uninsulated  
“dangerous voltage” within the product’s  
enclosure that may be of sufficient magnitude  
to constitute a risk of electric shock to  
persons.  
CAUTION  
RISK OF ELECTRIC SHOCK  
DO NOT OPEN  
CAUTION: TO REDUCE THE RISK OF  
ELECTRIC SHOCK, DO NOT REMOVE  
COVER (OR BACK). NO USER-SERVICEABLE  
PARTS INSIDE. REFER SERVICING TO  
QUALIFIED SERVICE PERSONNEL.  
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.  
The above warning is located on the top of the unit.  
IMPORTANT SAFETY INSTRUCTIONS  
1
2
3
4
5
6
7
Read these instructions.  
Keep these instructions.  
Heed all warnings.  
Follow all instructions.  
Do not use this apparatus near water.  
Clean only with dry cloth.  
Do not block any ventilation openings. Install in  
accordance with the manufacturer’s instructions.  
Do not install near any heat sources such as  
radiators, heat registers, stoves, or other apparatus  
(including amplifiers) that produce heat.  
Do not defeat the safety purpose of the polarized or  
grounding-type plug. A polarized plug has two  
blades with one wider than the other. A grounding  
type plug has two blades and a third grounding  
prong.The wide blade or the third prong are provided  
for your safety. If the provided plug does not fit into  
your outlet, consult an electrician for replacement of  
the obsolete outlet.  
11 Only use attachments/accessories specified by the  
manufacturer.  
12 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.  
8
9
13 Unplug this apparatus during lightning storms or  
when unused for long periods of time.  
14 Refer all servicing to qualified service personnel.  
Servicing is required when the apparatus has been  
damaged in any way, such as power-supply cord or  
plug is damaged, liquid has been spilled or objects  
have fallen into the apparatus, the apparatus has  
been exposed to rain or moisture, does not operate  
normally, or has been dropped.  
10 Protect the power cord from being walked on or  
pinched particularly at plugs, convenience  
receptacles, and the point where they exit from the  
apparatus.  
WARNING  
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPARATUS TO RAIN OR MOISTURE.  
(UL60065_03)  
FCC INFORMATION (U.S.A.)  
not guarantee that interference will not occur in all installations. If  
this product is found to be the source of interference, which can be  
determined by turning the unit “OFF” and “ON”, please try to elimi-  
nate the problem by using one of the following measures:  
Relocate either this product or the device that is being affected by  
the interference.  
Utilize power outlets that are on different branch (circuit breaker or  
fuse) circuits or install AC line filter/s.  
In the case of radio or TV interference, relocate/reorient the  
antenna. If the antenna lead-in is 300 ohm ribbon lead, change the  
lead-in to co-axial type cable.  
If these corrective measures do not produce satisfactory results,  
please contact the local retailer authorized to distribute this type of  
product. If you can not locate the appropriate retailer, please con-  
tact Yamaha Corporation of America, Electronic Service Division,  
6600 Orangethorpe Ave, Buena Park, CA90620  
The above statements apply ONLY to those products distributed by  
Yamaha Corporation of America or its subsidiaries.  
1. IMPORTANT NOTICE: DO NOT MODIFY THIS UNIT!  
This product, when installed as indicated in the instructions con-  
tained in this manual, meets FCC requirements. Modifications not  
expressly approved by Yamaha may void your authority, granted by  
the FCC, to use the product.  
2. IMPORTANT:When connecting this product to accessories and/  
or another product use only high quality shielded cables. Cable/s  
supplied with this product MUST be used. Follow all installation  
instructions. Failure to follow instructions could void your FCC  
authorization to use this product in the USA.  
3. NOTE:This product has been tested and found to comply with the  
requirements listed in FCC Regulations, Part 15 for Class “B” digital  
devices. Compliance with these requirements provides a reason-  
able level of assurance that your use of this product in a residential  
environment will not result in harmful interference with other elec-  
tronic devices. This equipment generates/uses radio frequencies  
and, if not installed and used according to the instructions found in  
the users manual, may cause interference harmful to the operation  
of other electronic devices. Compliance with FCC regulations does  
* This applies only to products distributed by YAMAHA CORPORATION OF AMERICA.  
(class B)  
 
PRECAUTIONS  
PLEASE READ CAREFULLY BEFORE PROCEEDING  
* Please keep this manual in a safe place for future reference.  
WARNING  
Always follow the basic precautions listed below to avoid the possibility of serious injury or even death from electrical  
shock, short-circuiting, damages, fire or other hazards. These precautions include, but are not limited to, the following:  
Power supply/Power cord  
Water warning  
• Only use the voltage specified as correct for the device. The required voltage is  
printed on the name plate of the device.  
• Do not expose the device to dripping or splashing, use it near water or in damp  
or wet conditions, or place containers on it containing liquids which might spill  
into any openings. If any liquid such as water seeps into the device, turn off the  
power immediately and unplug the power cord from the AC outlet. Then have  
the device inspected by qualified Yamaha service personnel.  
• Use only the included power cord.  
If you intend to use the device in an area other than in the one you purchased,  
the included power cord may not be compatible. Please check with your Yamaha  
dealer.  
• Never insert or remove an electric plug with wet hands.  
• Do not place the power cord near heat sources such as heaters or radiators, and  
do not excessively bend or otherwise damage the cord, place heavy objects on  
it, or place it in a position where anyone could walk on, trip over, or roll anything  
over it.  
If you notice any abnormality  
• If the power cord or plug becomes frayed or damaged, or if there is a sudden  
loss of sound during use of the device, or if any unusual smells or smoke  
should appear to be caused by it, immediately turn off the power switch,  
disconnect the electric plug from the outlet, and have the device inspected by  
qualified Yamaha service personnel.  
• Be sure to connect to an appropriate outlet with a protective grounding  
connection. Improper grounding can result in electrical shock.  
Do not open  
• If this device should be dropped or damaged, immediately turn off the power  
switch, disconnect the electric plug from the outlet, and have the device  
inspected by qualified Yamaha service personnel.  
• Do not open the device or attempt to disassemble the internal parts or modify  
them in any way. The device contains no user-serviceable parts. If it should  
appear to be malfunctioning, discontinue use immediately and have it inspected  
by qualified Yamaha service personnel.  
CAUTION  
Always follow the basic precautions listed below to avoid the possibility of physical injury to you or others, or damage  
to the device or other property. These precautions include, but are not limited to, the following:  
• Do not expose the device to excessive dust or vibrations, or extreme cold or heat  
(such as in direct sunlight, near a heater, or in a car during the day) to prevent  
the possibility of panel disfiguration or damage to the internal components.  
Power supply/Power cord  
• Remove the electric plug from the outlet when the device is not to be used for  
extended periods of time, or during electrical storms.  
• Do not place the device in an unstable position where it might accidentally fall  
over.  
• When removing the electric plug from the device or an outlet, always hold the  
plug itself and not the cord. Pulling by the cord can damage it.  
• Do not block the vents. This device has ventilation holes at the sides to prevent  
the internal temperature from becoming too high. In particular, do not place the  
device on its side or upside down. Inadequate ventilation can result in  
overheating, possibly causing damage to the device(s), or even fire.  
Location  
• Before moving the device, remove all connected cables.  
• Do not use the device in the vicinity of a TV, radio, stereo equipment, mobile  
phone, or other electric devices. Doing so may result in noise, both in the device  
itself and in the TV or radio next to it.  
• When setting up the devices, make sure that the power switch can be easily  
turned ON/OFF. If some trouble or malfunction occurs, immediately turn off the  
power switch and disconnect the plug from the outlet.  
• If the device is mounted in an EIA standard rack, carefully read the section  
overheating, possibly causing damage to the device(s), malfunction, or even  
fire.  
• Avoid setting all equalizer controls and faders to their maximum. Depending on  
the condition of the connected devices, doing so may cause feedback and may  
damage the speakers.  
(5)-6 1/2  
IMX644 Owner’s Manual 3  
 
Connections  
Handling caution  
• Before connecting the device to other devices, turn off the power for all devices.  
Before turning the power on or off for all devices, set all volume levels to  
minimum.  
• When turning on the AC power in your audio system, always turn on the power  
amplifier LAST, to avoid speaker damage. When turning the power off, the power  
amplifier should be turned off FIRST for the same reason.  
• The included power cable has a three-conductor plug, so if the AC outlet is  
grounded the IMX644 will be grounded appropriately.  
• Condensation can occur in the device due to rapid, drastic changes in ambient  
temperature – when the device is moved from one location to another, or air  
conditioning is turned on or off, for example. Using the device while  
condensation is present can cause damage. If there is reason to believe that  
condensation might have occurred, leave the device for several hours without  
turning on the power until the condensation has completely dried out.  
• Do not insert your fingers or hands in any gaps or openings on the device  
(ports, etc.).  
• Avoid inserting or dropping foreign objects (paper, plastic, metal, etc.) into any  
gaps or openings on the device (ports, etc.) If this happens, turn off the power  
immediately and unplug the power cord from the AC outlet. Then have the  
device inspected by qualified Yamaha service personnel.  
• Do not apply oil, grease, or contact cleaner to the faders. Doing so may cause  
problems with electrical contact or fader motion.  
• Do not rest your weight on the device or place heavy objects on it, and avoid use  
excessive force on the buttons, switches or connectors.  
Yamaha cannot be held responsible for damage caused by improper use or modifications to the device, or data that is lost or destroyed.  
Always turn the power off when the device is not in use.  
The performance of components with moving contacts, such as switches, volume controls, and connectors, deteriorates over time. Consult qualied Yamaha service  
personnel about replacing defective components.  
European models  
Purchaser/User Information specified in EN55103-1 and EN55103-2.  
Inrush Current: 10 A  
Conforms to Environments: E1, E2 E3 and E4  
SPECIAL NOTICES  
• The illustrations as shown in this manual are for instructional purposes only, and may appear somewhat different from those on your device.  
• The company names and product names in this manual are the trademarks or registered trademarks of their respective companies.  
• Specifications and descriptions in this owner’s manual are for information purposes only. Yamaha Corp. reserves the right to change or modify products or specifications  
at any time without prior notice. Since specifications, equipment or options may not be the same in every locale, please check with your Yamaha dealer.  
IMPORTANT NOTICE FOR THE UNITED KINGDOM  
COMPLIANCE INFORMATION STATEMENT  
(DECLARATION OF CONFORMITY PROCEDURE)  
Connecting the Plug and Cord  
WARNING: THIS APPARATUS MUST BE EARTHED  
IMPORTANT. The wires in this mains lead are coloured in accor-  
dance with the following code:  
Responsible Party : Yamaha Corporation of America  
Address : 6600 Orangethorpe Ave., Buena Park, Calif. 90620  
Telephone : 714-522-9011  
Type of Equipment : DIGITAL INSTALLATION MIXER  
Model Name : IMX644  
GREEN-AND-YELLOW  
BLUE  
:
:
:
EARTH  
NEUTRAL  
LIVE  
BROWN  
As the colours of the wires in the mains lead of this apparatus may  
not correspond with the coloured markings identifying the terminals  
in your plug proceed as follows:  
The wire which is coloured GREEN-and-YELLOW must be con-  
nected to the terminal in the plug which is marked by the letter E or  
This device complies with Part 15 of the FCC Rules.  
Operation is subject to the following two conditions:  
1) this device may not cause harmful interference, and  
2) this device must accept any interference received including interfer-  
ence that may cause undesired operation.  
by the safety earth symbol  
YELLOW.  
or colored GREEN or GREEN-and-  
See user manual instructions if interference to radio reception is sus-  
pected.  
The wire which is coloured BLUE must be connected to the terminal  
which is marked with the letter N or coloured BLACK.  
The wire which is coloured BROWN must be connected to the termi-  
nal which is marked with the letter L or coloured RED.  
* This applies only to products distributed by  
YAMAHA CORPORATION OF AMERICA.  
(FCC DoC)  
• This applies only to products distributed by Yamaha Music U.K. Ltd.  
(3 wires)  
(5)-6 2/2  
4 IMX644 Owner’s Manual  
 
Table of contents  
IMX644 Owner’s Manual 5  
 
Introduction  
Thank you for purchasing the Yamaha IMX644 Digital Installation Mixer. In order to take full  
advantage of the IMX644 functionality and to ensure trouble-free operation, please read this  
owner’s manual carefully before use. After you have read the manual, keep it in a safe place  
for reference when needed.  
Features  
Versatile Input/Output Configuration  
Powerful Mixing Features  
The IMX644 features an input/output configuration that is ideal  
for a wide range of applications: six mono inputs, four stereo in-  
puts, two stereo outputs, two mono outputs, and one dedicated  
stereo output for recording.  
Parametric EQ  
Parametric equalization is provided on all input channels: 3-  
band EQ on mono input channels, and 2-band EQ on stereo  
input channels.  
6-band EQ is provided on all outputs except the recording  
output.  
16 Memories  
Up to 16 sets of mixer settings can be stored in memory and in-  
stantly recalled as required. Four of the memories can be directly  
recalled via front-panel MEMORY [A] through [D] buttons.  
Feedback Suppressor  
Feedback suppression is provided on all six mono input  
channels.  
The Feedback Suppressor provides two stages of feedback  
prevention: static filters that can be set in advance, and  
dynamic filters that self-adjust in real time to control feed-  
back.  
Optical Digital I/O  
Connecting to compatible devices (CD and DVD players, for ex-  
ample) via the optical digital interface allows accurate signal  
transfer with no loss of signal quality. The digital input features  
a built-in sample rate converter, so there is no need for word  
clock synchronization.  
Priority for Specified Voice or Music Sources  
The Priority Ducker automatically “ducks” (reduces the vol-  
ume of) the background when a signal is applied to a speci-  
fied mono input channel, making announcements stand out  
for greater intelligibility. All stereo inputs assigned to the  
same output channel are reduced to a specified level when  
priority input is detected.  
Music Override gives priority to a music source applied to a  
specified stereo input channel. All other stereo inputs  
assigned to the same output channel are muted when prior-  
ity input is detected.  
Delay  
Precise delays can be applied to all outputs to allow time  
alignment for a solid sonic image with clear imaging and  
optimum overall sound quality throughout the listening  
area.  
Accessories  
AC power cord  
Rubber feet x 4  
Euroblock plug (3P) x 12  
Owner’s Manual (this document)  
6 IMX644 Owner’s Manual  
 
   
Introduction  
Precautions for Rack  
Mounting  
Before Operation  
Connecting the AC Power Cable  
This unit will operate stably in an environmental temperature of  
0–40˚C. If you install this device together with multiple units of  
the same device or other devices in an EIA standard rack, the  
heat produced by the various devices may raise the ambient tem-  
perature inside the rack, resulting in inefficient performance. To  
ensure that the heat produced by this device can be dissipated ap-  
propriately, please ensure the following conditions when rack-  
mounting it.  
CAUTION  
Before connecting the power cable, make sure that the power  
switches of all devices are turned OFF.  
First connect the supplied power cable to the [AC IN] socket on  
the rear panel of the IMX644, then connect the AC plug to an ap-  
propriate AC power outlet (make sure the local supply voltage  
matches the rated AC voltage of the unit).  
If multiple units are mounted in the same rack, leave a 1U  
rack space between every two units. Also either leave the  
open spaces uncovered or install appropriate ventilating  
panels to minimize the possibility of heat buildup.  
When mounting this device together with other heat-pro-  
ducing equipment such as power amplifiers, leave 1U or  
more space between it and other devices. Install a ventila-  
tion panel in this vacant space or leave it open to ensure ade-  
quate cooling.  
Powering ON or OFF  
CAUTION  
To prevent loud noise bursts from the speakers when power-  
ing up the system, turn devices ON in the following order:  
audio sources (microphones, CD players, etc.), IMX644, and  
finally power amplifiers. Reverse this order when turning the  
system off.  
To ensure sufficient airflow, leave the rear of the rack open  
and position it at least 10 centimeters from walls or other  
surfaces. If the rear of the rack can’t be left open, install a  
commercially available fan or similar ventilating option to  
secure sufficient airflow. If you’ve installed a fan kit, there  
may be cases in which closing the rear of the rack will pro-  
duce a greater cooling effect. Refer to the rack and/or fan  
unit manual for details.  
1
2
Press the [ON] end of the [POWER] switch to  
turn the unit ON.  
Press the [OFF] end of the [POWER] switch to  
turn the unit OFF.  
CAUTION  
Rapidly turning the unit ON and OFF in succession can  
cause it to malfunction. After turning the unit OFF, wait for  
more than 6 seconds before turning it ON again.  
Acquiring the IMX644  
Manager Software and  
Manuals  
The information in this manual deals primarily with setting up  
and operating the IMX644 hardware.  
For detailed parameter control the IMX644 Manager software  
application is required. The IMX644 Manager software and  
manuals can be downloaded from Yamaha’s professional audio  
website (URL below).  
The available IMX644 Manager documents are as follows:  
IMX644 Manager Owner’s Manual  
This manual contains detailed information relating to the  
IMX644 unit and IMX644 Manager software.  
IMX644 Owner’s Manual 7  
 
       
Controls and Functions  
Front Panel  
1
3
6
9
)
@
2 4  
5
7
8
!
#
1 [LOCK] Switch and Indicator  
2 [USB] Connector  
The [LOCK] switch can be used to “lock” the panel level knobs  
(5, 8, and 11), making them inoperable and preventing acciden-  
tal changes. After setting levels and/or recalling a memory as re-  
quired, press the [LOCK] switch with a thin object (such as the  
tip of a pen) to prevent further changes to the level settings. The  
LOCK indicator lights red when the controls are locked.  
Press the [LOCK] switch a second time to unlock the controls  
and allow normal operation of the level knobs.  
The computer running the IMX644 Manager application can be  
connected to the IMX644 via this connector. The [USB] connec-  
tor cannot be used at the same time as the rear-panel [REMOTE]  
connector.  
Precautions when using the [USB] connector  
When connecting the computer to the [USB] connector,  
make sure to observe the following points. Failing to do so  
risks freezing the computer and corrupting or losing the data.  
If the computer or the device freezes, restart the application  
software or the computer OS, or turn the power to the device  
off then on again.  
NOTE  
The LOCK buttons in the IMX644 Manager application  
INPUT display can be used to enable independent operation  
of each panel level control.  
If the settings of the level knobs have been increased since  
the [LOCK] switch was engaged, the settings at the time the  
[LOCK] switch was engaged will be retained when it is  
disengaged. In order to increase a level setting after  
disengaging the [LOCK] switch in such a case it is necessary  
to lower the setting of the knob to the point at which it was  
locked, and then raise the level as required.  
CAUTION  
Use an AB type USB cable of less than about 3 meters.  
Before connecting the computer to the [USB] connector,  
exit from any power-saving mode of the computer (such  
as suspend, sleep, standby).  
When the power is turned ON, the MEMORY number that  
was active when the power was turned OFF is recalled. Save  
the memory using the IMX644 Manager application before  
engaging the [LOCK] switch.  
The LOCK function is temporarily disengaged when the  
IMX644 Manager application goes online. The LOCK  
function will be re-engaged if the unit is restarted, so don’t  
operate the [LOCK] switch while the IMX644 Manager is  
online.  
Before turning on the power to the device, connect the  
computer to the [USB] connector.  
Execute the following before turning the power to the  
device on/off or plugging/unplugging the USB cable to/  
from the [USB] connector.  
-
-
Quit any open application software on the computer.  
Make sure that data is not being transmitted from the  
device.  
While the computer is connected to the device, you  
should wait for six seconds or more between these  
operations: (1) when turning the power of the device off  
then on again, or (2) when alternately connecting/  
disconnecting the USB cable.  
8 IMX644 Owner’s Manual  
 
   
Controls and Functions  
MONO INPUT Section  
OUTPUT Section  
3 Matrix Indicators  
9 Level Meter  
The outputs to which each mono input are assigned are displayed  
by orange indicators.  
Displays the levels of the signal being output via OUTPUT 1 and  
2.  
If the PEAK indicator lights the output level is too high. If exces-  
sively high output levels are indicated, reduce the input and/or  
output levels as required.  
4 [SIGNAL/PEAK] Indicators  
These indicators light green when a signal is detected at the cor-  
responding mono input.  
NOTE  
The [SIGNAL/PEAK] indicators also light red to indicate exces-  
sive input level at the corresponding input. If excessive input  
level is indicated either reduce the output level of the connected  
source, or reduce the IMX644 input sensitivity via the appropri-  
ate rear-panel [PAD] switch or by reducing the [INPUT GAIN]  
setting via the IMX644 Manager application.  
The signals OUTPUT 1 and 2 are both stereo pairs, so each  
level meter indicates the output level of the mixed L and R  
signal.  
) [SIGNAL/PEAK] Indicators  
These indicators light green when a signal is detected at  
OUTPUT 3 and 4.  
The [SIGNAL/PEAK] indicators also light red to indicate exces-  
sive output level at the corresponding output. If excessive output  
level is indicated, reduce the input level or output level.  
5 Level Knobs  
These knobs adjust the input level of the corresponding mono  
channels.  
! Level Knobs  
STEREO INPUT Section  
These knobs adjust the output level from the corresponding out-  
put channels.  
6 Matrix Indicators  
The outputs to which each stereo input are assigned are dis-  
played by orange indicators.  
@ MEMORY [A] – [D] Buttons  
Recalling Memories  
7 [SIGNAL/PEAK] Indicators  
To recall a memory press and hold one of the MEMORY  
buttons for about 2 seconds – the button’s indicator will  
light and the mix settings assigned to that memory will be  
recalled.  
Settings are stored in the IMX644 memories via the  
IMX644 Manager application. Memories A through D all  
contain the same settings when the unit is initially shipped  
from the factory.  
These indicators light green when a signal is detected at the cor-  
responding stereo input.  
The [SIGNAL/PEAK] indicators also light red to indicate exces-  
sive input level at the corresponding input. If excessive input  
level is indicated, reduce the output level of the connected  
source.  
NOTE  
Switching Modes  
The [SIGNAL/PEAK] indicator may light red when certain  
types of signals are received via the OPTICAL input, but in  
such cases the signal is within range and no further adjust-  
ments are required.  
To start the unit in IMX644 Manager mode, hold the MEM-  
ORY [D] button while turning the [POWER] switch ON.  
The unit starts up in the “normal” mode if the power is  
turned on while the MEMORY [D] button is not held.  
8 Level Knobs  
This mode allows communication with  
These knobs adjust the input level of the corresponding stereo  
channels.  
IMX644  
Manager Mode  
the IMX644 application. Communica-  
tion with AMX and similar external  
controllers cannot occur in this mode.  
This is the unit’s normal operating  
mode. Communication with AMX and  
similar external controllers is also pos-  
sible in this mode. Communication  
with the IMX644 Manager application  
is not possible in this mode.  
Normal Mode  
# [POWER] Switch & Indicator  
Turns power to the unit ON or OFF. The indicator lights green  
when the power is ON.  
NOTE  
Since the level settings for each channel are stored in the  
IMX644 unit itself, be sure that the IMX644 Manager applica-  
tion is online when setting up the memories.  
IMX644 Owner’s Manual 9  
 
Controls and Functions  
Rear Panel  
NOTE  
Refer to “Connectors and Cables” on page 13 for details on connectors and cables for use with the IMX644.  
1
3
5
7
8
9
2
4
6
)
1 [AC IN] Connector  
STEREO INPUT Section  
Connect the supplied AC cable here.  
First connect the AC cable to the IMX644, then plug it into an  
appropriate AC outlet.  
5 L/R Connectors 1, 2, 3, 4A, and OPTICAL 4B  
The output from CD players and other stereo line-level sources  
can be connected to these stereo inputs.  
2 Earth Screw  
NOTE  
For maximum safety, please earth the unit properly. The sup-  
plied AC power cable is a 3-wire type, so if the AC outlet used  
is properly earthed the IMX644 will be earthed as well. Hum and  
interference may by further reduced in some cases by also con-  
necting the earth screw to an earth point.  
The 4A (L/R) connectors and 4B (OPTICAL) connector can-  
not be used simultaneously.  
REC OUT Section  
6 L/R Connectors A and OPTICAL B  
3 [REMOTE] Connector  
A CD recorder or other stereo recorder can be connected here.  
This RS-232C connector allows communication with a comput-  
er running the IMX644 Manager application or external control-  
lers.  
The [REMOTE] connector cannot be used simultaneously with  
the front-panel [USB] connector. If both connectors are connect-  
ed, the front-panel [USB] connector takes priority.  
NOTE  
A feedback loop can occur if a CD recorder or similar device  
is connected to both a STEREO INPUT and the REC OUT  
connectors. In such cases use the IMX644 Manager applica-  
tion MATRIX controls to turn the OUTPUT channel to REC  
OUT connector assignment off.  
4 [GPI] Connector  
MONO INPUT Section  
This 25-pin D-sub GPI (General Purpose Interface) connector  
provides eight input ports and eight output ports for a variety of  
control signals, plus one dedicated output port that indicates the  
unit’s power ON/OFF status.  
7 Euroblock Connectors  
Microphones and similar mono sources can be connected to  
these balanced input connectors. High-quality head amplifiers  
Euroblock connectors.  
8 [PAD] Switches  
When ON, input to the corresponding mono channel is attenuat-  
ed by 34 dB. The pads are ideal for matching input sensitivity to  
the output from wireless microphone tuners and similar high-  
output source devices.  
10 IMX644 Owner’s Manual  
 
 
Controls and Functions  
9 [+48V] Switch  
When ON, 48V phantom power is applied to the corresponding  
mono input. Turn the [+48V] switch ON for channels to which  
phantom-powered condenser microphones or other devices that  
require phantom power are connected.  
CAUTION  
Make sure that phantom power is turned OFF unless it is  
needed.  
When turning phantom power ON, make sure that no  
equipment other than phantom-powered devices such  
condenser microphones are connected to the corresponding  
MONO INPUT connectors. Applying phantom power to a  
device that does not require phantom power can damage the  
device.  
Do not connect or disconnect a device to a MONO INPUT  
while phantom power is applied. Doing so can damage the  
connected device and/or the unit itself.  
Make sure that the system’s power amplifiers and/or powered  
speakers are turned OFF while turning phantom power ON  
or OFF to prevent damage to the speakers. We also  
recommend setting all level controls to minimum level. If  
these measures are not observed sudden high-level noise  
bursts can potentially damage equipment and even the  
hearing of people in the area.  
OUTPUT Section  
) Euroblock Connectors  
These balanced output connectors are for connection to power  
amplifiers and other output devices.  
OUTPUT 1 and 2 are stereo outputs. The A connector outputs  
the left-channel signal, and the B connector outputs the right-  
channel signal. OUTPUT 1 and 2 can also be assigned for mono  
output via the IMX644 Manager application.  
tions on connecting to the Euroblock connectors.  
IMX644 Owner’s Manual 11  
 
Connections  
System Example  
Computer  
Cassette deck  
Microphone  
MD player  
Wireless microphone  
CD recorder  
Wireless tuner  
AMX or similar external  
controller  
1
5
2
6
3
7
4
8
Power amplifier  
External control input/  
output device  
Zone 1  
speakers  
Power amplifier  
Zone 3 speakers  
Zone 2  
speakers  
Zone 4 speakers  
12 IMX644 Owner’s Manual  
 
   
Connections  
Euroblock Plug Connection  
Use the included Euroblock plug (3P) to make connections to the  
[MONO INPUT] and [OUTPUT] connectors.  
Connectors and Cables  
[MONO INPUT] and [OUTPUT] Con-  
Cable preparation  
nectors (3-pin Euroblock)  
To prepare the cable for  
attachment to a Eurob-  
lock connector, strip the  
wire as shown in the  
illustration, and use  
approx. 7 mm  
Connect external microphones, amplifiers and other devices to  
the rear-panel [MONO INPUT] and [OUTPUT] connectors via  
cables fitted with the supplied 3-pin Euroblock plugs.  
Follow the procedure outlined in this section to attach the Eurob-  
lock plugs to the appropriate cables.  
stranded wire to make  
connections. With a Euroblock connection, the stranded  
wire may be prone to breakage because of metal fatigue  
due to the weight of the cable or due to vibration. When  
rack-mounting your equipment, use a lacing bar when  
possible to bundle and fasten the cables.  
Euroblock Pin Assignments  
Signal  
name  
Pin No.  
1
2
3
HOT  
COLD  
GND  
1
2
3
If cables will be fre-  
quently connected and  
disconnected, as in the  
case of a portable instal-  
lation, we recommend  
that you use ferrules with  
insulation sleeves. Use a  
ferrule whose conductor  
1.6 mm or less  
approx. 7 mm  
Use balanced lines to connect microphones and similar sources  
to the [MONO INPUT] connectors. Wire balanced cables as  
shown in the diagram below.  
XLR-3-11C (or equivalent)  
portion has an external diameter of 1.6 mm or less, and a  
length of approximately 7 mm (such as the AI0,5-6WH  
made by the Phoenix Contact corporation).  
1
2
1
3
2
CAUTION  
3
If you use stranded wire, do not tin (plate with solder) the  
exposed end.  
When an amplifier to be connected to the OUTPUT connector  
has balanced XLR type inputs, wire the connection cable as  
shown in the diagram below.  
1
Loosen the terminal screws.  
NOTE  
XLR-3-12C (or equivalent)  
A “minus” type screwdriver with a blade width of approxi-  
mately 3 millimeters is recommended for Euroblock connec-  
tor attachment.  
1
2
1
3
3mm  
2
3
Loosen  
Slotted screwdriver  
Terminal screw  
Euroblock plug  
2
Insert the cables.  
IMX644 Owner’s Manual 13  
 
   
Connections  
[GPI] Connector (25-pin D-sub)  
External GPI (General Purpose Interface) control devices can be  
connected to this connector to allow input and output of remote  
control signals.  
The IMX644 GPI port has eight inputs and eight outputs, plus a  
dedicated “POWER MONITOR” output that indicates the unit’s  
ON/OFF status.  
3
4
Securely tighten the terminal screws.  
Pull the cables (not too strongly) to confirm that they are  
securely connected.  
Connect the Euroblock plug to the IMX644  
Euroblock connector.  
The input pins are normally left open. Shorting an input pin to  
ground (GND) recalls the corresponding memory number.  
The output pins are open-collector outputs that deliver a maxi-  
mum output of +35 volts, with a maximum current capability of  
30 mA per port.  
For the POWER MONITOR outputs, pins 24 and 25 are  
“closed” (shorted) when the power is ON. The POWER MONI-  
TOR COLD pin (pin 25) is internally connected to the GND  
pins.  
The IMX644 Manager application can be used for parameter as-  
signment.  
Connector Pin Assignments  
13121110 9  
8
7
6
5
4
3
2
1
[REMOTE] Connector (RS-232C)  
Connect to this connector when controlling the IMX644 from  
the IMX644 Manager application or an external AMX/Crestron  
controller. Use an RS-232C cross cable for connection.  
252423222120191817161514  
Pin No.  
Signal name  
GND  
Pin No.  
Signal name  
Unused  
RxD  
Connector Pin  
Assignments  
1
1
2
3
4
5
6
7
8
9
2
GND  
1
2
3
4
5
3
INPUT 1  
TxD  
4
INPUT 2  
DTR  
5
INPUT 3  
GND  
6
7
8
9
6
INPUT 4  
DSR  
7
INPUT 5  
RTS  
8
INPUT 6  
CTS  
9
INPUT 7  
Unused  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
INPUT 8  
An external AMX or similar controller can be used to send com-  
mands to the IMX644 to recall memories and adjust the level of  
available remote control commands.  
GND  
GND  
GND  
OUTPUT 1  
OUTPUT 2  
OUTPUT 3  
OUTPUT 4  
OUTPUT 5  
OUTPUT 6  
OUTPUT 7  
OUTPUT 8  
GND  
GND  
POWER MONITOR HOT  
POWER MONITOR COLD  
14 IMX644 Owner’s Manual  
 
Mix Functions  
mix functions that can be controlled by the IMX644 Manager application are discussed in this section. For operating details refer to the  
IMX644 Manager Owner’s Manual.  
To enable communication with the IMX644 Manager application, press and hold the IMX644 MEMORY [D] button while turning the  
[POWER] switch ON.  
MATRIX  
The MATRIX allows individual input channels to be assigned to  
any of the mixer’s output channels. The assignments are shown  
Input Channels  
on the display. The initial default settings are: send assignments  
GAIN  
to all output channels are ON, with only OUT1 assigned to the  
The gain of the mono input channel head amplifiers can be indi-  
REC OUT channel. The send levels from individual mono input  
vidually adjusted and displayed.  
channels to the output channels can also be adjusted and dis-  
Parameter  
Range  
Initial value  
-35dB  
played.  
GAIN (PAD is off)  
GAIN (PAD is ON)  
-54dB – -30dB  
-20dB – +4dB  
Parameter  
SEND LEVEL  
Range  
Initial value  
-1dB  
-– 0dB  
0dB  
INPUT EQ  
The parameters of the input channel equalizers can be individu-  
ally adjusted and displayed. The parameters available for each  
channel are listed below.  
Temporary Matrix Assignment  
Changes  
The panel controls can be used to temporarily turn on the output  
assignments of individual input channels, as follows.  
MONO INPUT CHANNEL  
1
2
Set all OUTPUT channel level controls to “0”.  
Parameter  
Range  
Initial value  
0dB  
G
-15dB – +15dB  
2kHz – 18kHz  
-15dB – +15dB  
40Hz – 18kHz  
0.5 – 12.0  
Set the level of the INPUT channel to be  
assigned to “10”.  
HIGH  
MID  
F
G
F
10kHz  
0dB  
3
Press and hold the MEMORY button correspond-  
2kHz  
ing to the output channel you want to assign the  
input channel to for longer than 3 seconds while  
rotating the INPUT channel level control towards  
“0”.  
Q
G
F
0.7  
-15dB – +15dB  
40Hz – 2kHz  
0dB  
LOW  
100Hz  
Button  
Output channel  
OUTPUT 1  
OUTPUT 2  
OUTPUT 3  
OUTPUT 4  
STEREO INPUT CHANNEL  
A
B
C
D
Parameter  
Range  
Initial value  
0dB  
G
-15dB – +15dB  
2kHz – 18kHz  
-15dB – +15dB  
40Hz – 2kHz  
HIGH  
LOW  
F
G
F
10kHz  
0dB  
4
5
The corresponding MATRIX indicator will light.  
Repeat for other channels as required.  
100Hz  
NOTE  
Output assignments made in this way are only temporary and  
will not be saved to memory. If power to the unit is turned  
OFF and then ON again the memorized settings prior to  
making the changes as described above will be recalled.  
IMX644 Owner’s Manual 15  
 
   
Mix Functions  
Feedback Suppressor  
7
Simultaneously press and hold MEMORY but-  
The Feedback Suppressor effectively controls feedback by iden-  
tifying the feedback frequencies that will occur naturally as a re-  
sult of the combined acoustic and electrical characteristics of the  
sound system within the acoustic space in which it is used. The  
Feedback Suppressor includes static filters that provide mea-  
surement and filtering for specified channels, and dynamic fil-  
ters that monitor the condition of specified MONO INPUT  
channels and automatically suppress feedback as it occurs.  
Static filter measurements can be made either via the IMX644  
Manager application or the IMX644 unit itself. Measurement  
from the IMX644 itself is described in “Front Panel Static Filter  
Measurement” below.  
tons [A], [C], and [D] for longer than two sec-  
onds.The MEMORY [A], [C], and [D] button  
indicators will light and static filter measure-  
ment will begin.When the measurement process  
has finished the static filter will be set according  
to the results and the MEMORY button indica-  
tors will return to their status prior to the mea-  
surement.  
NOTE  
If all four MEMORY button indicators light – [A], [B], [C], and  
[D] – an error has occurred during measurement. To prevent  
damage to the equipment the measurement will be aborted  
and the erroneous data discarded. If this occurs try changing  
the orientation of the microphone and speakers, lower the  
amplifier output, then repeat the procedure from step 1  
above.  
Static filter measurement may not be successful if the overall  
level is too high or the microphone is too close to one of the  
speakers.  
With the initial default settings the static filters are inactive,  
while the dynamic filters are ON for all MONO INPUT chan-  
nels.  
NOTE  
The initial default setting is Feedback Suppressor ON. Even  
though the static filters are inactive, the dynamic filters are  
still operational so be sure to turn the Feedback Suppressor  
OFF before using sine waves or test tones to test or calibrate  
the system.  
Priority Ducker  
When a signal is applied to the specified MONO INPUT channel  
the level of all STEREO INPUT signals assigned to the same  
output are reduced to allow announcements made via the MONO  
INPUT channel to stand out clearly from background music or  
other program material, for example. When input to the specified  
MONO INPUT channel ceases the level of the other “ducked”  
channels returns to normal.  
Feedback Suppressor settings can be stored in the unit’s 16  
memories.  
Front Panel Static Filter Measurement  
To ensure optimum feedback suppression be sure to perform the  
measurements under the same conditions that will prevail during  
actual operation (microphone and speaker positions, etc.).  
The initial default setting is OFF for all channels.  
Both the amount of attenuation and the time it takes to return to  
normal level can be programmed as required.  
1
2
Set the OUTPUT channel 1 through 4 level con-  
trols to 3 o’clock.  
Set the level control of the MONO INPUT to  
Parameter  
Mute Level  
Release Time  
Range  
Initial value  
-20dB  
which the microphone that is to be used for  
measurement is connected to 3 o’clock.  
-30.2dB – 0dB  
0.0 – 6.0sec  
2.0sec  
3
4
Set up the microphone at least 5 meters away  
from the speakers.  
Music Override  
When a signal is applied to the specified STEREO INPUT chan-  
nel all other STEREO INPUT channels assigned to the same out-  
put are automatically faded out and muted. When input to the  
specified STEREO INPUT channel ceases the level of the other  
muted channels fades in and returns to normal.  
The initial default setting is OFF for all channels.  
The time it takes to fade-in to normal level can be programmed  
as required.  
Adjust the output level of the power amplifier.  
While speaking or singing into the microphone gradually  
raise the output level of the power amplifier to the level  
that will be used in actual operation. Also clap your hands  
near the microphone to make sure that feedback does not  
occur.  
NOTE  
5
6
Set the level control of the MONO INPUT channel  
If Music Override is ON for more than one channel, the low-  
est-numbered channel takes priority.  
to which the microphone that is to be used for  
measurement is connected to “0”.  
Parameter  
Range  
Initial value  
Make sure the area being measured is silent.  
Release Time  
0.0 – 6.0sec  
4.0sec  
16 IMX644 Owner’s Manual  
 
Mix Functions  
BALANCE  
Adjusts the A/B level balance for OUTPUT channels 1 and 2.  
Output Channels  
Parameter  
BALANCE  
Range  
Initial value  
OUTPUT EQ  
0dB – 20.1dB  
0dB  
The parameters of the independent 6-band parametric equalizers  
provided for OUTPUT channels 1 through 4 can be adjusted and  
displayed. The following EQ types can be specified for each  
band.  
Output Format (STEREO/MONO)  
Specifies whether OUTPUT channels 1 and 2 deliver a STEREO  
or MONO output signal. When [STEREO] is selected the left  
channel signal is delivered via the A connector and the right-  
channel signal is delivered via the B connector. The initial de-  
fault setting is [STEREO].  
Type  
Parameter  
Range  
F
G
40Hz – 18kHz  
-15dB – +15dB  
0.5 – 12.0  
PEQ (Peaking EQ)  
Q
F
40Hz – 18kHz  
12dB/oct (Fixed)  
0.7 (Fixed)  
HPF (High Pass Filter)  
LPF (Low Pass Filter)  
Slope  
Q
Others  
F
40Hz – 18kHz  
12dB/oct (Fixed)  
0.7 (Fixed)  
Slope  
Q
GPI (General Purpose Interface)  
GPI Input  
F
40Hz – 18kHz  
-15dB – +15dB  
40Hz – 18kHz  
-15dB – +15dB  
Applying an appropriate input to one of the rear-panel GPI  
input ports recalls the assigned memory. Individual assign-  
ments can be made for each input port.  
L. Shelf (Low Shelving EQ)  
H.Shelf (High Shelving EQ)  
G
F
G
GPI Output  
Recalling a memory causes a pre-assigned combination of  
ON and OFF outputs to appear at the GPI output ports. The  
ON/OFF combinations can be independently assigned for  
each memory.  
The initial default settings when the P.EQ type is selected are as  
follows.  
Parameter  
Initial value  
The initial default assignments for all memories are all out-  
puts OFF.  
Q
0.7 (for all frequency parameters)  
F1  
F2  
F3  
F4  
F5  
F6  
40Hz  
100Hz  
500Hz  
2kHz  
MEMORY  
Up to 16 sets of parameters can be memorized. Of those, four  
can be assigned for direct recall from the front-panel MEMORY  
[A] through [D] buttons. For access to five or more memories at  
a time either use the IMX644 Manager application, or a suitable  
external controller connected to the GPI interface.  
5kHz  
10kHz  
NOTE  
DELAY  
Sets the output channel delay time.  
One of the main uses for this feature is to delay the output to sub  
speakers slightly compared to the main speakers, to create a solid  
frontal sonic image.  
MEMORY buttons [A] through [D] are initially set up to recall  
the same data.  
Since the level settings for each channel are stored in the  
IMX644 unit itself, be sure that the IMX644 Manager  
application is online when setting up the memories.  
Parameter  
DELAY  
Range  
Initial value  
0 – 300msec  
0msec  
IMX644 Owner’s Manual 17  
 
   
Appendix  
Troubleshooting  
Symptom  
Possible Cause  
Solution  
The power cable is not prop-  
erly connected.  
After connecting the power cable to the connector on the rear panel  
of the IMX644, plug the cable into an appropriate AC outlet.  
The power won’t turn on.  
The audio cables are not  
properly connected.  
Check all audio connections.  
Connected devices are not  
turned ON.  
Check to make sure that the power to all connected devices is turned ON.  
Check the matrix indicators to make sure that the input and output  
assignments are correct. If the matrix settings are not appropriate  
use the IMX644 Manager application to set them as required. Also  
check the matrix send levels.  
No sound.  
Wrong matrix settings.  
Level settings too low.  
Make sure that the panel level controls are set appropriately. If this  
doesn’t produce the desired output check the settings via the IMX644  
manager application.  
Sound levels don’t change  
when the level knobs are  
operated.  
or disengage LOCK for a specific knob via the IMX644 Manager  
application.  
The LOCK function may be  
engaged.  
The MEMORY button is not  
being held long enough.  
Press and hold the MEMORY button for longer than two seconds.  
Pressing a MEMORY button  
results in no change to the  
settings.  
No settings have been  
saved in memory.  
Make the required settings via the IMX644 Manager application, and  
then save them to the appropriate memory.  
The appropriate memory-to-  
button assignment has not  
been made.  
Use the IMX644 Manager application to assign the desired memory  
to the button.  
The [LOCK] switch hasn’t  
been properly pressed. The  
LOCK indicator will be off if  
the controls aren’t locked.  
Press the [LOCK] switch (page 8).The LOCK indicator will light when  
the controls are locked.  
The IMX644 cannot be locked.  
The IMX644 has been  
locked via the IMX644 Man-  
ager application.  
Make sure that the [LOCK] buttons in the IMX644 Manager BLOCK  
or INPUT screen are turned on (pages 21 and 24 of the IMX644  
Manager owner’s manual).  
The [LOCK] switch doesn  
work.  
t  
Memory cannot be recalled  
via the GPI interface.  
A memory is not assigned to  
the GPI input.  
Use the IMX644 Manager application to assign the desired memory  
to the GPI Input Terminal.  
The IMX644 cannot be oper-  
ated from an external con-  
troller (AMX/Crestron).  
Turn the IMX644 power OFF, and then after waiting for at least six  
seconds turn the power ON again (without holding the MEMORY [D]  
button) to start the IMX644 in “normal” mode.  
The IMX644 is operating in  
IMX644 Manager mode.  
The IMX644 cannot be oper-  
ated from the IMX644 Man-  
ager application.  
Turn the IMX644 power OFF, and then after waiting for at least six  
seconds turn the power ON again while holding the MEMORY [D]  
button to start the IMX644 in “IMX644 Manager” mode.  
The IMX644 is operating in  
normal mode.  
The Parameter Edit screen  
will not open when the pass-  
word is entered via the  
IMX644 Manager.  
Initialize the internal IMX644 memory if the password has been lost  
or forgotten.  
The password is incorrect.  
Memory Initialization  
The following procedure initializes the IMX644 memory.  
CAUTION  
All data stored in memory will be erased when the memory is initialized. Perform the following procedure with caution.  
1
2
Turn the IMX644 power OFF.  
Turn the power back ON while simultaneously holding the MEM-  
ORY [A] and [D] buttons.  
Initialization will take about one second.  
When initialization is complete the odd-numbered matrix input channel indica-  
tors will light.  
18 IMX644 Owner’s Manual  
 
     
Appendix  
3
To recall the initial memory data press a MEMORY button for longer than two seconds.  
NOTE  
Initialization erases the password required to connect the IMX644 Manager application to the IMX644 unit. After initialization it will be  
necessary to set a new password to bring the IMX644 online.  
IMX644 Status List  
The chart below shows the panel and memory recall operations that are effective with various combinations of modes, panel LOCK  
settings, and IMX644 Manager LOCK/LINK settings, and whether the panel or memorized level settings are applied when a memory  
is recalled.  
Individual  
Channel Settings  
(IMX644  
Operations that Affect Actual  
Level  
IMX644 Settings  
Operations that Recall Memories  
Manager)  
IMX644  
Manager  
Control  
IMX644  
Manager  
Control  
[LOCK]  
indicator button  
[LOCK] [LINK]  
Level  
Knobs  
External MEMORY  
Controller buttons  
External  
Controller  
Level  
Setting  
GPI  
button  
Level Knob  
Setting  
unlit  
unlit  
unlit  
unlit  
lit  
ON  
ON  
ON  
Effective  
Effective  
Effective  
Effective  
Invalid  
Memory  
Setting  
OFF  
ON  
Effective  
Effective  
Level Knob  
Setting  
OFF  
OFF  
ON  
Memory  
Setting  
OFF  
ON  
Offline  
Memory  
Setting  
Memory  
Setting  
lit  
ON  
OFF  
ON  
Invalid  
IMX644  
Manager  
Mode  
Effective  
Effective  
Level Knob  
Setting  
lit  
OFF  
OFF  
ON  
Effective  
Effective  
Effective  
Invalid  
Memory  
Setting  
lit  
OFF  
ON  
Level Knob  
Setting  
unlit  
unlit  
unlit  
unlit  
unlit  
unlit  
unlit  
unlit  
lit  
Invalid  
Memory  
Setting  
ON  
OFF  
ON  
Effective  
Online*  
Effective  
Effective Effective  
Level Knob  
Setting  
OFF  
OFF  
ON  
Effective  
Invalid  
Invalid  
Memory  
Setting  
OFF  
ON  
Effective  
Level Knob  
Setting  
Effective  
Effective  
Effective  
Effective  
Invalid  
Effective  
Memory  
Setting  
ON  
OFF  
ON  
Effective  
Effective  
Effective  
Effective  
Effective  
Level Knob  
Setting  
OFF  
OFF  
ON  
Memory  
Setting  
OFF  
ON  
Effective  
Effective  
Normal Mode  
Memory  
Setting  
Memory  
Setting  
lit  
ON  
OFF  
ON  
Invalid  
Effective  
Effective  
Effective  
Effective  
Effective  
Level Knob  
Setting  
lit  
OFF  
OFF  
Effective  
Effective  
Memory  
Setting  
lit  
OFF  
Effective  
*
When the IMX644 is online in the IMX644 Manager mode, LOCK is temporarily disengaged and the panel [LOCK] indicator will go  
out. Do not operate the panel [LOCK] switch in this condition.  
NOTE  
Since the level settings for each channel are stored in the IMX644 unit itself, be sure that the IMX644 Manager application is online  
when setting up the memories.  
IMX644 Owner’s Manual 19  
 
 
Appendix  
Remote Control Protocol Specifications  
The commands that can be transferred between the IMX644 and a remote controller are as follows.  
<Command> <Option 1> <Option 2> … <Option n> <Line Feed>  
A line feed (LF = 0x0A) is necessary at then end of every command line.  
At least one character space is required between the command name and first option, and between options.  
Communication Specifications  
Baud Rate : 38400 bps  
Data : 8bit  
Parity : none  
Stop Bit : 1bit  
Flow Control : none  
Memory Recall  
Individual Channel Level Control  
Communication Direction  
Command  
Communication Direction  
Command  
RSC 0 m  
RSC OK  
SVL 0 c x  
SVL OK  
External Controller  
External Controller  
External Controller  
IMX644  
IMX644  
IMX644  
External Controller  
External Controller  
External Controller  
IMX644  
IMX644  
IMX644  
SCN 0 m  
VOL 0 c x  
VOL 0 0 x  
VOL 0 1 x  
External Controller  
External Controller  
IMX644  
IMX644  
External Controller  
IMX644  
VOL 0 13 x  
m: memory number (1–16)  
c: channel number (0–13)  
x: level value (0–127)  
0
1
MONO 1  
MONO 2  
127  
126  
125  
124  
123  
122  
121  
120  
119  
118  
117  
116  
115  
114  
113  
112  
111  
110  
109  
108  
107  
106  
105  
104  
103  
102  
-  
101  
100  
99  
98  
97  
96  
95  
94  
93  
92  
91  
90  
89  
88  
87  
86  
85  
84  
83  
82  
81  
80  
79  
78  
77  
76  
-37.9  
-36.7  
-35.6  
-34.5  
-33.6  
-32.7  
-31.8  
-31.0  
-30.2  
-29.4  
-28.7  
-28.0  
-27.3  
-26.7  
-26.1  
-25.5  
-24.9  
-24.4  
-23.9  
-23.4  
-22.9  
-22.4  
-22.0  
-21.6  
-21.2  
-20.8  
75  
74  
73  
72  
71  
70  
69  
68  
67  
66  
65  
64  
63  
62  
61  
60  
59  
58  
57  
56  
55  
54  
53  
52  
51  
50  
-20.4  
49  
48  
47  
46  
45  
44  
43  
42  
41  
40  
39  
38  
37  
36  
35  
34  
33  
32  
31  
30  
29  
28  
27  
26  
25  
24  
-10.0  
-9.6  
-9.2  
-8.8  
-8.4  
-8.0  
-7.6  
-7.2  
-6.8  
-6.4  
-6.0  
-5.6  
-5.2  
-4.8  
-4.4  
-4.0  
-3.6  
-3.2  
-2.8  
-2.4  
-2.0  
-1.6  
-1.2  
-0.8  
-0.4  
0.0  
23  
22  
21  
20  
19  
18  
17  
16  
15  
14  
13  
12  
11  
10  
9
0.4  
0.8  
-∞  
-20.0  
-19.6  
-19.2  
-18.8  
-18.4  
-18.0  
-17.6  
-17.2  
-16.8  
-16.4  
-16.0  
-15.6  
-15.2  
-14.8  
-14.4  
-14.0  
-13.6  
-13.2  
-12.8  
-12.4  
-12.0  
-11.6  
-11.2  
-10.8  
-10.4  
2
MONO 3  
-∞  
1.2  
3
MONO 4  
-111.4  
-102.4  
-94.4  
-88.4  
-83.4  
-78.4  
-74.4  
-70.4  
-66.4  
-63.8  
-60.6  
-57.6  
-55.1  
-52.9  
-50.9  
-49.1  
-47.5  
-46.0  
-44.5  
-43.1  
-41.7  
-40.4  
-39.1  
1.6  
4
MONO 5  
2.0  
5
MONO 6  
2.4  
6
STEREO 1  
STEREO 2  
STEREO 3  
STEREO 4  
OUTPUT1  
OUTPUT2  
OUTPUT3  
OUTPUT4  
2.8  
7
3.2  
8
3.7  
9
4.2  
10  
11  
12  
13  
4.7  
5.2  
5.8  
6.5  
7.3  
8
8.1  
7
9.0  
6
10.0  
10.0  
10.0  
10.0  
10.0  
10.0  
10.0  
5
4
3
2
1
0
20 IMX644 Owner’s Manual  
 
 
Appendix  
General Specifications  
Signal Delay  
2.5ms (MONO INPUT [1-6] to OUTPUT[1-4])  
Dimensions (W x H x D)  
Net Weight  
480 x 88 x 364.5 mm  
5.5kg  
U.S/Canada: 120V, 60Hz  
Korea:  
China:  
Other:  
220V, 60Hz  
220V, 50Hz  
110V-240V, 50/60Hz  
Power Requirements  
Power Consumption  
Heat Dissipation  
21W  
18.06 kcal/h  
Operating: 0 to +40˚C  
Temperature range  
Storage: -20 to +60˚C  
Included Accessories  
AC Power Cord Length  
Owner’s Manual, AC Power Cord, Rubber feet x 4, 3-pin Euroblock plug x 12  
200 cm  
Conditions  
Min.  
39.69  
Typ.  
Max.  
50.88  
Unit  
kHz  
kHz  
Sampling Frequency External Clock  
Sampling Frequency Internal Clock  
Frequency Range  
Frequency  
word clock : int 48kHz  
48  
Input/output Characteristics  
ANALOG INPUT CHARACTERISTICS  
Input level  
PAD  
34dB  
Actual Load  
Impedance  
For Use With  
Nominal  
Input Terminals  
GAIN  
Connector  
Nominal  
-54dBu (1.55mV)  
-30dBu (24.5mV)  
-20dBu (77.5mV)  
+4dBu (1.23V)  
Max. before clip  
-40dBu (7.75mV)  
-16dBu (123mV)  
-6dBu (387mV)  
MAX  
MIN  
MAX  
MIN  
OFF  
ON  
4.2kΩ  
20kΩ  
20kΩ  
EUROBLOCK  
(Balanced)  
(5.08mm pitch)  
50-600Mics  
& 600Lines  
MONO INPUT [1-6]  
+18dBu (6.16V)  
STEREO INPUT [1L/R,  
2L/R, 3L/R, 4A L/R]  
RCA Pin Jack  
(Unbalanced)  
600Lines  
-4dBV (0.631V)  
+10dBV (3.16V)  
*
*
*
0dBu = 0.775 Vrms. , 0dBV = 1.00 Vrms.  
+48V DC( phantom power ) is supplied to MONO INPUT[1-6] EUROBLOCK connectors via each individual switch.  
All AD converters are 24 bit linear, 64times oversampling.  
ANALOG OUTPUT CHARACTERISTICS  
Output level  
Actual Source  
Output Terminals  
For Use With  
Nominal  
Connector  
Impedance  
Nominal  
Max. before clip  
EUROBLOCK  
(Balanced)  
(5.08mm pitch)  
OUTPUT [1A/B, 2A/B, 3, 4]  
900Ω  
450Ω  
10kLines  
10kLines  
+4dBu (1.23V)  
+18dBu (6.16V)  
RCA Pin Jack  
(Unbalanced)  
REC OUT [L, R]  
-4dBV (0.631V)  
+10dBV (3.16V)  
*
*
0dBu = 0.775 Vrms. , 0dBV = 1.00 Vrms.  
All DA converters are 24 bit linear,128times oversampling.  
DIGITAL INPUT CHARACTERISTICS  
DIGITAL OUTPUT CHARACTERISTICS  
Data  
length  
Data  
length  
Terminal  
Format  
Level  
Connector  
Terminal  
Format  
JEITA  
Level  
Connector  
STEREO  
INPUT [4B]  
JEITA  
CP-1212  
OPTICAL  
Square  
OPTICAL  
Square  
24bit  
-24 to –14.5dBm *1  
REC OUT  
24bit  
-21 to –15dBm *1  
CP-1212  
*1 0dBm = 1mW  
*1 0dBm = 1mW  
CONTROL I/O CHARACTERISTICS  
Terminal  
Format  
Level  
Connector  
IN  
Mechanical “make” contact  
Compatible with open collector output  
GPI *1  
OUT  
Open Collector  
Open Collector  
RS-232C  
D-SUB 25P (Female)  
POWER MONITOR OUTPUT  
REMOTE  
USB  
RS-232C  
D-SUB 9P (Male)  
Type B  
USB 1.1 Function  
*1 INPUT: 8 ports, OUTPUT: 8 ports  
OUTPUT: Withstanding Voltage Vmax = 35V (OFF)  
OUTPUT: Sink Current Imax = 30mA/1 port, Imax = 240mA/8 ports (ON)  
OUTPUT: Shorted to GND when ON  
POWER MONITOR: OPEN (POWER OFF), SHORT (POWER ON)  
POWER MONITOR: Withstanding Voltage Vmax = 35V (POWER OFF)  
POWER MONITOR: Sink Current Imax = 30mA (POWER ON)  
IMX644 Owner’s Manual 21  
 
   
Appendix  
Electrical Characteristics  
Output impedance of signal generator : 150 ohms  
Frequency Response  
20Hz-20kHz, reference to the nominal output level @1kHz  
Input  
MONO INPUT [1-6]  
STEREO INPUT [1L/R-4L/R]  
STEREO INPUT [1L/R-4L/R]  
OPTICAL IN  
Output  
RL  
Conditions  
Min.  
-1.5  
-1  
Typ.  
0.0  
0.0  
0.0  
0.0  
0.0  
Max.  
0.5  
0.5  
0.5  
0.5  
0.5  
Unit  
dB  
dB  
dB  
dB  
dB  
OUTPUT [1-4]  
OUTPUT [1-4]  
REC OUT [L, R]  
OUTPUT [1-4]  
REC OUT [L, R]  
10KΩ  
10KΩ  
10KΩ  
10KΩ  
10KΩ  
-1  
-1  
OPTICAL IN  
-1  
Total Harmonic Distortion  
@1kHz  
Input  
MONO INPUT [1-6]  
Output  
RL  
Conditions  
+4dBu@1kHz, GAIN: MAX, PAD: OFF  
+4dBu@1kHz, GAIN: MIN, PAD: ON  
+4dBu@1kHz  
Min.  
Typ.  
Max.  
0.1  
Unit  
%
OUTPUT [1-4]  
OUTPUT [1-4]  
OUTPUT [1-4]  
REC OUT [L, R]  
10KΩ  
10KΩ  
10KΩ  
10KΩ  
MONO INPUT [1-6]  
0.08  
0.1  
%
STEREO INPUT [1L/R-4L/R]  
STEREO INPUT [1L/R-4L/R]  
%
-4dBV@1kHz  
0.1  
%
*
Total Harmonic Distortion are measured with a 22kHz low pass filter  
EIN (EIN=Equivalent Input Noise)  
Input  
Output  
RL  
Conditions  
Min.  
Typ.  
Max.  
Unit  
Rs=150, GAIN:MAX, PAD: OFF  
OUTPUT level control at nominal level and one  
INPUT level control at nominal level.  
MONO INPUT [1-6]  
OUTPUT [1-4]  
10KΩ  
-120  
dBu  
* EIN are measured with a IHF-A filter  
Hum & Noise  
Input  
Output  
OUTPUT [1-4]  
REC OUT [L, R]  
RL  
10KΩ  
10KΩ  
Conditions  
all level control at minimum level  
all level control at minimum level  
Min.  
Typ.  
Max.  
-82  
Unit  
dBu  
dBV  
-90  
* Hum & Noise are measured with a DIN AUDIO filter  
Crosstalk  
@1kHz  
from/to  
to/from  
CH (N-1) or (N+1)  
CH (N-1) or (N+1)  
Conditions  
all adjacent inputs  
Min.  
Typ.  
Max.  
-70  
Unit  
dB  
CH N  
CH N  
all adjacent outputs  
-70  
dB  
Maximum voltage gain  
@1kHz  
Input  
MONO INPUT [1-6]  
MONO INPUT [1-6]  
Output  
OUTPUT [1-4]  
REC OUT [L, R]  
RL  
10KΩ  
10KΩ  
Conditions  
Rs=150, GAIN: MAX, PAD: OFF  
Rs=150, GAIN: MAX, PAD: OFF  
Min.  
Typ.  
58  
Max.  
Unit  
dB  
52.2  
dB  
Phantom Voltage  
Output  
Conditions  
Min.  
Typ.  
Max.  
Unit  
MONO INPUT [1-6]  
hot & cold: No load  
46  
48  
50  
V
Indicator turn on level  
Input  
Output  
Conditions  
red LED:  
Min.  
Typ.  
-2  
Max.  
0
Unit  
dBFs  
dBFs  
dBFs  
dBFs  
PEAK  
ON  
-4  
-42  
-4  
MONO INPUT [1-6]  
STEREO INPUT [1L/R-4L/R]  
SIGNAL green LED: ON  
PEAK red LED: ON  
-38  
-2  
-34  
0
OUTPUT [3, 4]  
SIGNAL green LED: ON  
-48  
-44  
-40  
Level Meter turn on level  
Input  
Output  
Conditions  
PEAK red LED:  
Min.  
-4  
Typ.  
-2  
Max.  
0
Unit  
dBFs  
dBFs  
dBFs  
dBFs  
dBFs  
dBFs  
ON  
ON  
ON  
ON  
ON  
ON  
-8  
orange LED:  
-10  
-16  
-22  
-34  
-48  
-8  
-6  
-14  
-20  
-32  
-44  
orange LED:  
green LED:  
green LED:  
green LED:  
-14  
-20  
-32  
-44  
-12  
-18  
-30  
-40  
OUTPUT [1,2]  
22 IMX644 Owner’s Manual  
 
 
Appendix  
GPI Circuit Example  
Example: Controlling the IMX644 from a switch  
IMX644  
+5V  
1K  
INPUT  
GND  
47K  
CPU  
22K  
Example: Lighting the LED of an external device from the IMX644  
IMX644  
Max.30mA  
110  
OUTPUT  
GND  
Lit  
Max. +35V  
CPU  
Example: Lighting the LED of an external device while the IMX644 power is ON.  
IMX644  
POWER  
Max.30mA  
Lit  
MONITOR  
HOT  
110  
POWER  
MONITOR  
COLD  
Max. +35V  
Power ON  
IMX644 Owner’s Manual 23  
 
 
Appendix  
Dimensions  
480  
Unit: mm  
* Specifications and descriptions in this owner’s manual are for information purposes only. Yamaha Corp. reserves the right to change  
or modify products or specifications at any time without prior notice. Since specifications, equipment or options may not be the same  
in every locale, please check with your Yamaha dealer.  
24 IMX644 Owner’s Manual  
 
 
Appendix  
Block Diagram  
4 B U O S U T  
3 B U O S U T  
2 B ( R O ) U B T U S  
2 A ( L O ) U B T U S  
1 B ( R O ) U B T U S  
1 A ( L O ) U B T U S  
IMX644 Owner’s Manual 25  
 
 
Information for Users on Collection and Disposal of Old Equipment  
This symbol on the products, packaging, and/or accompanying documents means that used  
electrical and electronic products should not be mixed with general household waste.  
For proper treatment, recovery and recycling of old products, please take them to applicable col-  
lection points, in accordance with your national legislation and the Directives 2002/96/EC.  
By disposing of these products correctly, you will help to save valuable resources and prevent  
any potential negative effects on human health and the environment which could otherwise arise  
from inappropriate waste handling.  
For more information about collection and recycling of old products, please contact your local  
municipality, your waste disposal service or the point of sale where you purchased the items.  
[For business users in the European Union]  
If you wish to discard electrical and electronic equipment, please contact your dealer or supplier  
for further information.  
[Information on Disposal in other Countries outside the European Union]  
This symbol is only valid in the European Union. If you wish to discard these items, please con-  
tact your local authorities or dealer and ask for the correct method of disposal.  
 
For details of products, please contact your nearest Yamaha representative or the authorized distributor listed below.  
POLAND  
NORTH AMERICA  
ASIA  
Yamaha Music Europe GmbH  
Branch Sp.z o.o. Oddzial w Polsce  
ul. 17 Stycznia 56, PL-02-146 Warszawa, Poland  
Tel: 022-868-07-57  
CANADA  
THE PEOPLE’S REPUBLIC OF CHINA  
Yamaha Canada Music Ltd.  
135 Milner Avenue, Scarborough, Ontario,  
M1S 3R1, Canada  
Yamaha Music & Electronics (China) Co.,Ltd.  
2F, Yunhedasha, 1818 Xinzha-lu, Jingan-qu,  
Shanghai, China  
Tel: 416-298-1311  
THE NETHERLANDS/  
Tel: 021-6247-2211  
BELGIUM/LUXEMBOURG  
U.S.A.  
INDIA  
Yamaha Music India Pvt. Ltd.  
5F Ambience Corporate Tower Ambience Mall Complex  
Ambience Island, NH-8, Gurgaon-122001, Haryana, India  
Tel: 0124-466-5551  
Yamaha Music Europe Branch Benelux  
Clarissenhof 5-b, 4133 AB Vianen, The Netherlands  
Tel: 0347-358 040  
Yamaha Corporation of America  
6600 Orangethorpe Ave., Buena Park, Calif. 90620,  
U.S.A.  
Tel: 714-522-9011  
FRANCE  
Yamaha Musique France  
BP 70-77312 Marne-la-Vallée Cedex 2, France  
Tel: 01-64-61-4000  
INDONESIA  
PT. Yamaha Music Indonesia (Distributor)  
PT. Nusantik  
Gedung Yamaha Music Center, Jalan Jend. Gatot  
Subroto Kav. 4, Jakarta 12930, Indonesia  
Tel: 21-520-2577  
CENTRAL & SOUTH AMERICA  
MEXICO  
Yamaha de México S.A. de C.V.  
Calz. Javier Rojo Gómez #1149,  
Col. Guadalupe del Moral  
C.P. 09300, México, D.F., México  
Tel: 55-5804-0600  
ITALY  
Yamaha Musica Italia S.P.A.  
Combo Division  
Viale Italia 88, 20020 Lainate (Milano), Italy  
Tel: 02-935-771  
KOREA  
Yamaha Music Korea Ltd.  
8F, 9F, Dongsung Bldg. 158-9 Samsung-Dong,  
Kangnam-Gu, Seoul, Korea  
Tel: 080-004-0022  
SPAIN/PORTUGAL  
BRAZIL  
Yamaha Música Ibérica, S.A.  
Ctra. de la Coruna km. 17, 200, 28230  
Las Rozas (Madrid), Spain  
Tel: 91-639-8888  
Yamaha Musical do Brasil Ltda.  
Rua Joaquim Floriano, 913 - 4' andar, Itaim Bibi,  
CEP 04534-013 Sao Paulo, SP. BRAZIL  
Tel: 011-3704-1377  
MALAYSIA  
Yamaha Music Malaysia, Sdn., Bhd.  
Lot 8, Jalan Perbandaran, 47301 Kelana Jaya,  
Petaling Jaya, Selangor, Malaysia  
Tel: 3-78030900  
SWEDEN  
ARGENTINA  
Yamaha Music Latin America, S.A.  
Sucursal de Argentina  
Olga Cossettini 1553, Piso 4 Norte  
Madero Este-C1107CEK  
Buenos Aires, Argentina  
Yamaha Scandinavia AB  
J. A. Wettergrens Gata 1, Box 30053  
S-400 43 Göteborg, Sweden  
Tel: 031 89 34 00  
SINGAPORE  
Yamaha Music Asia Pte., Ltd.  
#03-11 A-Z Building  
DENMARK  
YS Copenhagen Liaison Office  
Generatorvej 6A, DK-2730 Herlev, Denmark  
Tel: 44 92 49 00  
140 Paya Lebor Road, Singapore 409015  
Tel: 747-4374  
Tel: 011-4119-7000  
PANAMA AND OTHER LATIN  
AMERICAN COUNTRIES/  
CARIBBEAN COUNTRIES  
Yamaha Music Latin America, S.A.  
Torre Banco General, Piso 7, Urbanización Marbella,  
Calle 47 y Aquilino de la Guardia,  
Ciudad de Panamá, Panamá  
TAIWAN  
Yamaha KHS Music Co., Ltd.  
3F, #6, Sec.2, Nan Jing E. Rd. Taipei.  
Taiwan 104, R.O.C.  
NORWAY  
Norsk filial av Yamaha Scandinavia AB  
Grini Næringspark 1, N-1345 Østerås, Norway  
Tel: 67 16 77 70  
Tel: 02-2511-8688  
THAILAND  
RUSSIA  
Tel: +507-269-5311  
Siam Music Yamaha Co., Ltd.  
4, 6, 15 and 16th floor, Siam Motors Building,  
891/1 Rama 1 Road, Wangmai,  
Pathumwan, Bangkok 10330, Thailand  
Tel: 02-215-2626  
Yamaha Music (Russia)  
Room 37, bld. 7, Kievskaya street, Moscow, 121059,  
Russia  
Tel: 495 626 5005  
EUROPE  
THE UNITED KINGDOM  
Yamaha Music U.K. Ltd.  
Sherbourne Drive, Tilbrook, Milton Keynes,  
MK7 8BL, England  
OTHER EUROPEAN COUNTRIES  
Yamaha Music Europe GmbH  
Siemensstraße 22-34, 25462 Rellingen, Germany  
Tel: +49-4101-3030  
OTHER ASIAN COUNTRIES  
Yamaha Corporation,  
Asia-Pacific Sales & Marketing Group  
Nakazawa-cho 10-1, Naka-ku, Hamamatsu,  
Japan 430-8650  
Tel: 01908-366700  
GERMANY  
Yamaha Music Europe GmbH  
Siemensstraße 22-34, 25462 Rellingen, Germany  
Tel: 04101-3030  
Tel: +81-53-460-2303  
AFRICA  
Yamaha Corporation,  
Asia-Pacific Sales & Marketing Group  
Nakazawa-cho 10-1, Naka-ku, Hamamatsu,  
Japan 430-8650  
OCEANIA  
SWITZERLAND/LIECHTENSTEIN  
AUSTRALIA  
Yamaha Music Europe GmbH  
Branch Switzerland in Zürich  
Seefeldstrasse 94, 8008 Zürich, Switzerland  
Tel: 01-383 3990  
Yamaha Music Australia Pty. Ltd.  
Level 1, 99 Queensbridge Street, Southbank,  
Victoria 3006, Australia  
Tel: +81-53-460-2303  
MIDDLE EAST  
TURKEY/CYPRUS  
Yamaha Music Europe GmbH  
Siemensstraße 22-34, 25462 Rellingen, Germany  
Tel: 04101-3030  
Tel: 3-9693-5111  
AUSTRIA  
Yamaha Music Europe GmbH Branch Austria  
Schleiergasse 20, A-1100 Wien, Austria  
Tel: 01-60203900  
COUNTRIES AND TRUST  
TERRITORIES IN PACIFIC OCEAN  
Yamaha Corporation,  
Asia-Pacific Sales & Marketing Group  
Nakazawa-cho 10-1, Naka-ku, Hamamatsu,  
Japan 430-8650  
CZECH REPUBLIC/SLOVAKIA/  
HUNGARY/SLOVENIA  
Yamaha Music Europe GmbH Branch Austria  
Schleiergasse 20, A-1100 Wien, Austria  
Tel: 01-602039025  
OTHER COUNTRIES  
Yamaha Music Gulf FZE  
LOB 16-513, P.O.Box 17328, Jubel Ali,  
Dubai, United Arab Emirates  
Tel: +971-4-881-5868  
Tel: +81-53-460-2303  
HEAD OFFICE Yamaha Corporation, Pro Audio Division  
Nakazawa-cho 10-1, Naka-ku, Hamamatsu, Japan 430-8650  
Tel: +81-53-460-2441  
PA26  
 

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